{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "instrument-air-package",
  "type": "registry:component",
  "title": "Instrument air package",
  "description": "Oil-free screw compressor in an acoustic enclosure (louvres, roof fan, controller), pre-filter and coalescer with auto drains, a twin-tower heatless desiccant dryer with switching valves, purge silencers and controller, an after-filter with dew-point transmitter and a vertical dry-air receiver with PSV, gauge, transmitter, inspection opening and auto drain. Enclosure scales with `kw`; the receiver wall comes from UG-27 for `pressure`.",
  "dependencies": [
    "three",
    "@react-three/fiber",
    "@react-three/drei"
  ],
  "registryDependencies": [
    "https://deck-twin-library.demoareeb.workers.dev/r/core.json"
  ],
  "files": [
    {
      "path": "packages/instrument-air-package.tsx",
      "type": "registry:file",
      "target": "components/deck-twin/packages/instrument-air-package.tsx",
      "content": "// Instrument air package: oil-free screw compressor in an acoustic enclosure, pre / after filters, twin-tower desiccant dryer and air receiver on one skid. ISO 8573-1, ASME VIII-1.\nimport { useEffect, useMemo } from 'react'\nimport * as THREE from 'three'\nimport { Kit, mat4, uvScale, type MatKey, type V3 } from '../lib/kit'\nimport { KitMesh, type GroupProps } from '../lib/mesh'\nimport { paint } from '../lib/materials'\nimport { gauge, manway, nozzle, pipeRun, skid, tagPlate } from '../lib/parts'\nimport { port, type Port } from '../lib/ports'\nimport { Rotors, fanRotor, type RotorSpec } from '../lib/rotors'\nimport { SECTIONS, flange as flangeDims, pipeOD, shellThickness, type Rating } from '../lib/standards'\nimport { fanGuardMaterial, lcdMaterial, louvreMaterial, textMaterial } from '../lib/textures'\nimport { addv, blFlange, mateFlange, padeyeShackles, spoolJoint, cableTray, dripPan, earthBoss, localPanel, pipeSupport, shellLabel, smallPsv, smallValve, transmitter, valve, valveSpan, vVessel, vesselLegs } from './_skid'\n\nexport interface InstrumentAirPackageProps {\n  /** compressor motor, kW */\n  kw?: number\n  /** receiver inside diameter, m */\n  receiverDiameter?: number\n  /** receiver tangent-to-tangent height, m */\n  receiverHeight?: number\n  /** receiver design pressure, barg */\n  pressure?: number\n  outletNps?: number\n  tag?: string\n  running?: boolean\n}\n\nexport const defaults = {\n  kw: 55,\n  receiverDiameter: 1.0,\n  receiverHeight: 2.2,\n  pressure: 13,\n  outletNps: 2,\n  tag: 'K-4600',\n  running: true,\n}\n\ntype P = typeof defaults\n\nconst SKID = 'HEB 160'\nconst RATING: Rating = 150\nconst ENC: MatKey = paint('#d9dcd8', { metalness: 0.2, roughness: 0.5 })\nconst TRIM: MatKey = paint('#1f5fa0', { metalness: 0.25, roughness: 0.45 })\nconst TOWER: MatKey = paint('#3a6ea5', { metalness: 0.25, roughness: 0.45 })\n\nfunction layout(p: P) {\n  const kw = THREE.MathUtils.clamp(p.kw, 11, 250)\n  const encL = 1.3 + kw * 0.006\n  const encW = 0.95 + kw * 0.0028\n  const encH = 1.45 + kw * 0.003\n  const W = Math.max(2.0, encW + 0.9, p.receiverDiameter + 1.0)\n  const y0 = SECTIONS[SKID].d + 0.008\n  const x0 = 0.2\n  const xe1 = x0 + encL\n  const xF1 = xe1 + 0.45\n  const xF2 = xF1 + 0.38\n  const xD0 = xF2 + 0.5\n  const xD1 = xD0 + 0.62\n  const xF3 = xD1 + 0.5\n  const wall = shellThickness(p.pressure, p.receiverDiameter)\n  const Ro = p.receiverDiameter / 2 + wall\n  const xR = xF3 + 0.45 + Ro\n  const Sv = valveSpan('ball', p.outletNps, RATING)\n  const fo = flangeDims(p.outletNps, RATING)\n  const xFace = xR + Ro + 0.22 + Sv + 0.25 + fo.hubLength + fo.raisedFaceHeight\n  const L = xFace + 0.05\n  const sh = -L / 2\n  const yTL = y0 + 0.45 + p.receiverDiameter / 4 + wall\n  const yo = yTL + p.receiverHeight * 0.78\n  return { kw, encL, encW, encH, W, L, y0, x0: sh + x0, xe1: sh + xe1, xF1: sh + xF1, xF2: sh + xF2, xD0: sh + xD0, xD1: sh + xD1, xF3: sh + xF3, xR: sh + xR, Ro, wall, yTL, yo, Sv, yp: y0 + 1.25, zP: -0.2 }\n}\n\nexport function ports(props: InstrumentAirPackageProps = {}): Port[] {\n  const p = { ...defaults, ...props }\n  const g = layout(p)\n  return [port('outlet', 'Dry instrument air', [g.L / 2, g.yo, 0], [1, 0, 0], p.outletNps, RATING, 'utility')]\n}\n\nexport function InstrumentAirPackage(props: InstrumentAirPackageProps & GroupProps) {\n  const { kw, receiverDiameter, receiverHeight, pressure, outletNps, tag, running, ...group } = { ...defaults, ...props }\n  const p = { kw, receiverDiameter, receiverHeight, pressure, outletNps, tag, running }\n  const { built, rotors } = useMemo(() => build(p), [kw, receiverDiameter, receiverHeight, pressure, outletNps, tag]) // eslint-disable-line react-hooks/exhaustive-deps\n  useEffect(() => () => [built, ...rotors.map((r) => r.built)].forEach((b) => b.geometry.dispose()), [built, rotors])\n  return (\n    <group {...group}>\n      <KitMesh data={built} />\n      <Rotors rotors={rotors} running={running} />\n    </group>\n  )\n}\n\nexport default InstrumentAirPackage\n\nfunction louvre(k: Kit, w: number, h: number, pos: V3, n: V3) {\n  const g = new THREE.PlaneGeometry(w, h)\n  uvScale(g, 1, h / 0.06)\n  k.add(louvreMaterial('#c9ccc8'), g, mat4(pos, undefined).multiply(new THREE.Matrix4().makeRotationFromQuaternion(new THREE.Quaternion().setFromUnitVectors(new THREE.Vector3(0, 0, 1), new THREE.Vector3(...n)))))\n}\n\nfunction build(p: P) {\n  const k = new Kit()\n  const g = layout(p)\n  const { L, W, y0, encL, encW, encH, yp, zP } = g\n  const np = 2 // interconnecting piping, NPS\n  const od = pipeOD(np)\n  skid(k, L, W, SKID)\n  padeyeShackles(k, L, W, y0)\n  tagPlate(k, p.tag, [-L / 2 + 0.8, SECTIONS[SKID].d * 0.5, W / 2 + 0.002], 'z', 0.3)\n  earthBoss(k, [L / 2 - 0.4, SECTIONS[SKID].d * 0.5, W / 2], [0, 0, 1])\n  const rotors: RotorSpec[] = []\n\n  // ---------------------------------------------------------------- compressor enclosure\n  const ex = g.x0 + encL / 2\n  const ez = 0\n  k.box('equipmentPaintDark', [encL + 0.04, 0.12, encW + 0.04], [ex, y0 + 0.06, ez])\n  for (const s of [-1, 1]) k.box('rubberBlack', [0.25, 0.07, encW - 0.1], [ex + s * encL * 0.28, y0 + 0.06, ez])\n  const yb = y0 + 0.12\n  k.rbox(ENC, [encL, encH, encW], 0.02, [ex, yb + encH / 2, ez])\n  k.box(TRIM, [encL + 0.004, 0.08, encW + 0.004], [ex, yb + encH - 0.18, ez])\n  // door panels with seams, handles, hinges on the front (+Z) and back\n  const nd = Math.max(2, Math.round(encL / 0.75))\n  for (const s of [-1, 1]) {\n    const zf = ez + s * (encW / 2 + 0.002)\n    for (let i = 0; i < nd; i++) {\n      const dx = ex - encL / 2 + (encL * (i + 0.5)) / nd\n      const dw = encL / nd - 0.03\n      k.box('equipmentPaintDark', [0.008, encH - 0.32, 0.004], [ex - encL / 2 + (encL * i) / nd + 0.01, yb + (encH - 0.25) / 2, zf])\n      k.box('nut', [0.02, 0.12, 0.025], [dx + dw / 2 - 0.06, yb + encH * 0.5, zf + s * 0.012])\n      for (const hy of [0.25, encH - 0.45]) k.cyl('nut', 0.01, 0.06, [dx - dw / 2 + 0.02, yb + hy, zf + s * 0.006], 'y', 8)\n      if (i < nd - 1 || s < 0) louvre(k, dw * 0.8, 0.45, [dx, yb + 0.35, zf + s * 0.002], [0, 0, s])\n    }\n  }\n  louvre(k, encW * 0.7, encH * 0.45, [ex - encL / 2 - 0.002, yb + encH * 0.4, ez], [-1, 0, 0])\n  // controller display and e-stop on the front door\n  const dxC = ex + encL / 2 - encL / nd / 2\n  const zf = ez + encW / 2 + 0.004\n  k.box('rubberBlack', [0.3, 0.22, 0.01], [dxC, yb + encH * 0.68, zf])\n  k.plane(lcdMaterial(), 0.24, 0.15, [dxC, yb + encH * 0.68, zf + 0.0055])\n  k.cyl('actuatorYellow', 0.045, 0.006, [dxC + 0.2, yb + encH * 0.68, zf], 'z', 20)\n  k.dome('actuatorRed', 0.03, [dxC + 0.2, yb + encH * 0.68, zf + 0.004], 'z', Math.PI / 2, 0.7, 16)\n  k.plane(textMaterial('OIL-FREE SCREW', '#1f5fa0', '#ffffff', 512, 64), encL * 0.5, encL * 0.0625, [ex - encL * 0.15, yb + encH - 0.18, zf + 0.002])\n  // roof cooling-air outlet: raised hood with grille and the fan below\n  const hx = ex - encL * 0.18\n  const hw = Math.min(encW * 0.75, encL * 0.45)\n  k.box(ENC, [hw + 0.08, 0.2, hw + 0.08], [hx, yb + encH + 0.1, ez])\n  k.disc('rubberBlack', hw * 0.45, [hx, yb + encH + 0.17, ez], 'y', 32)\n  k.disc(fanGuardMaterial(), hw * 0.46, [hx, yb + encH + 0.205, ez], 'y', 32)\n  rotors.push(fanRotor('flangeSteel', hw * 0.42, [hx, yb + encH + 0.18, ez], 'y', 600, { blades: 7, pitch: 0.3 }))\n  // lifting points on the roof\n  for (const sx of [-1, 1]) for (const sz of [-1, 1]) k.torus('nut', 0.04, 0.01, [ex + sx * (encL / 2 - 0.12), yb + encH + 0.03, ez + sz * (encW / 2 - 0.12)], sz > 0 ? 'z' : 'z', 6, 14, Math.PI)\n\n  // discharge out of the enclosure end (+X), along the pipe rack line\n  const dOut: V3 = [ex + encL / 2, yp, zP]\n  k.box('equipmentPaintDark', [0.01, 0.22, 0.22], [dOut[0] + 0.005, yp, zP])\n  const ff = flangeDims(np, RATING)\n  const fj = ff.hubLength + ff.raisedFaceHeight + 0.00225\n  k.pipe('pipePaint', [dOut[0], yp, zP], [dOut[0] + 0.12 - fj, yp, zP], od, 0.004)\n  spoolJoint(k, [dOut[0] + 0.12, yp, zP], [1, 0, 0], np, RATING)\n  // power cable from the enclosure gland box to the LCP tray\n  k.rbox('stainless', [0.25, 0.25, 0.12], 0.01, [ex + encL * 0.3, yb + 0.5, ez - encW / 2 - 0.06])\n\n  // ---------------------------------------------------------------- filters (pre, coalescing, after)\n  const filter = (x: number, label: string) => {\n    const hy = yp\n    k.rbox('aluminium', [0.2, 0.14, 0.14], 0.02, [x, hy, zP])\n    k.cyl('aluminium', 0.075, 0.42, [x, hy - 0.29, zP], 'y', 24)\n    k.cyl('aluminium', 0.08, 0.04, [x, hy - 0.09, zP], 'y', 24)\n    k.cyl('stainless', 0.012, 0.08, [x, hy - 0.54, zP], 'y', 10)\n    k.rbox('rubberBlack', [0.05, 0.06, 0.05], 0.008, [x, hy - 0.6, zP])\n    k.tube('tubing', [[x, hy - 0.63, zP], [x, y0 + 0.08, zP], [x, y0 + 0.08, zP + 0.3]], 0.005, 6, 0.04)\n    gauge(k, [x, hy + 0.12, zP + 0.02], 'z', 0.06, 'bar', 1)\n    k.rod('stainless', [x, hy + 0.07, zP], [x, hy + 0.12, zP], 0.006, 6)\n    k.plane(textMaterial(label, '#1f5fa0', '#fff', 256, 64), 0.12, 0.03, [x, hy - 0.25, zP + 0.076])\n    k.box('galvanised', [0.06, hy - 0.2 - y0, 0.06], [x, (hy - 0.2 + y0) / 2, zP - 0.16])\n    k.box('galvanised', [0.06, 0.06, 0.12], [x, hy - 0.05, zP - 0.1])\n    k.box('galvanised', [0.14, 0.012, 0.14], [x, y0 + 0.006, zP - 0.16])\n  }\n  filter(g.xF1, 'PRE-FILTER')\n  filter(g.xF2, 'COALESCER')\n  pipeRun(k, [[dOut[0] + 0.12 + fj, yp, zP], [g.xF1 - 0.1, yp, zP]], np)\n  k.pipe('pipePaint', [g.xF1 + 0.1, yp, zP], [g.xF2 - 0.1, yp, zP], od, 0.004)\n  // condensate drain header to the drip pan\n  dripPan(k, (g.xF1 + g.xD1) / 2, zP + 0.35, g.xD1 - g.xF1 + 0.6, 0.3, y0, 0.05)\n\n  // ---------------------------------------------------------------- twin-tower desiccant dryer\n  const tId = 0.3\n  const tWall = shellThickness(p.pressure, tId)\n  const tTT = 1.45\n  const tTL = y0 + 0.55\n  const xm = (g.xD0 + g.xD1) / 2\n  for (const x of [g.xD0, g.xD1]) {\n    const T = vVessel(k, x, 0, tTL, tId, tTT, tWall, TOWER, 32)\n    k.box('structSteel', [0.25, 0.012, 0.25], [x, tTL - T.hd - 0.12, 0])\n    k.cyl(TOWER, 0.05, 0.1, [x, tTL - T.hd - 0.06, 0], 'y', 16)\n    k.cyl(TOWER, 0.05, 0.12, [x, T.yTop + 0.04, 0], 'y', 16)\n    gauge(k, [x, T.yTop + 0.06, 0.12], 'z', 0.08, 'bar', 16)\n    k.rod('stainless', [x, T.yTop + 0.06, 0.05], [x, T.yTop + 0.06, 0.1], 0.006, 6)\n    for (const y of [tTL + 0.3, tTL + tTT - 0.3]) k.torus('structSteel', T.Ro + 0.012, 0.01, [x, y, 0], 'y', 6, 32)\n    k.plane(textMaterial('DESICCANT', '#3a6ea5', '#ffffff', 256, 64), 0.18, 0.045, [x, tTL + tTT * 0.55, T.Ro + 0.003])\n  }\n  // dryer frame\n  for (const sx of [-1, 1])\n    for (const sz of [-1, 1]) {\n      k.box('structSteel', [0.06, tTT + 0.5, 0.06], [xm + sx * 0.55, y0 + (tTT + 0.5) / 2, sz * 0.3])\n      k.box('structSteel', [0.12, 0.012, 0.12], [xm + sx * 0.55, y0 + 0.006, sz * 0.3])\n    }\n  for (const y of [tTL + 0.3, tTL + tTT - 0.3]) for (const sz of [-1, 1]) k.box('structSteel', [1.16, 0.05, 0.03], [xm, y, sz * 0.3])\n  for (const y of [tTL + 0.3, tTL + tTT - 0.3]) for (const x of [g.xD0, g.xD1]) k.box('structSteel', [0.03, 0.05, 0.6], [x, y, 0])\n  // inlet / exhaust manifold with switching valves and purge silencers\n  const yBm = tTL - 0.4\n  pipeRun(k, [[g.xF2 + 0.1, yp, zP], [g.xF2 + 0.25, yp, zP], [g.xF2 + 0.25, yBm, zP], [xm, yBm, zP], [xm, yBm, 0]], np)\n  k.pipe('pipePaint', [g.xD0, yBm, 0], [g.xD1, yBm, 0], od, 0.004)\n  for (const x of [g.xD0, g.xD1]) k.pipe('pipePaint', [x, yBm, 0], [x, tTL - 0.25, 0], od, 0.004)\n  for (const [i, x] of [g.xD0 + 0.16, g.xD1 - 0.16].entries()) {\n    k.rbox('valveBody', [0.1, 0.1, 0.1], 0.01, [x, yBm, 0])\n    k.rbox('actuatorYellow', [0.2, 0.09, 0.1], 0.015, [x, yBm + 0.12, 0])\n    k.rbox('valveBody', [0.1, 0.1, 0.1], 0.01, [x, yBm, 0.14])\n    k.pipe('pipePaint', [x, yBm, 0.03], [x, yBm, 0.14], od * 0.6, 0.003)\n    k.cyl('stainless', 0.07, 0.3, [x, yBm - 0.2, 0.14], 'y', 18)\n    k.dome('stainless', 0.07, [x, yBm - 0.35, 0.14], '-y', Math.PI / 2, 0.5, 18)\n    k.rbox('actuatorYellow', [0.16, 0.08, 0.08], 0.012, [x, yBm + 0.1, 0.14])\n    void i\n  }\n  // top manifold with check valves, purge line and outlet\n  const yTm = tTL + tTT + tId / 4 + 0.35\n  for (const x of [g.xD0, g.xD1]) k.pipe('pipePaint', [x, yTm, 0], [x, tTL + tTT + tId / 4 + 0.08, 0], od * 0.8, 0.004)\n  k.pipe('pipePaint', [g.xD0 - 0.04, yTm, 0], [g.xD1 + 0.04, yTm, 0], od, 0.004)\n  for (const x of [g.xD0 + 0.18, g.xD1 - 0.18]) k.rbox('valveBody', [0.12, 0.09, 0.09], 0.01, [x, yTm, 0])\n  k.tube('tubing', [[g.xD0 + 0.05, yTm + 0.05, 0], [g.xD0 + 0.05, yTm + 0.14, 0], [g.xD1 - 0.05, yTm + 0.14, 0], [g.xD1 - 0.05, yTm + 0.05, 0]], 0.008, 8, 0.03)\n  smallValve(k, 'needle', [xm, yTm + 0.14, 0], [1, 0, 0], 0.007, [0, 1, 0])\n  // dryer controller with cable to the tray\n  k.rbox('stainless', [0.35, 0.4, 0.15], 0.012, [xm, tTL + 0.45, 0.42])\n  k.plane(lcdMaterial(), 0.16, 0.08, [xm, tTL + 0.55, 0.496])\n  k.cyl('safetyGreen', 0.012, 0.01, [xm - 0.08, tTL + 0.35, 0.5], 'z', 10)\n  k.cyl('actuatorRed', 0.012, 0.01, [xm + 0.08, tTL + 0.35, 0.5], 'z', 10)\n  for (const sx of [-1, 1]) k.box('structSteel', [0.04, 0.5, 0.04], [xm + sx * 0.12, tTL + 0.45, 0.33])\n  // after-filter and dry-air line to the receiver\n  filter(g.xF3, 'AFTER-FILTER')\n  pipeRun(k, [[xm, yTm, 0], [xm, yTm + 0.0, 0], [g.xD1 + 0.04, yTm, 0]], np)\n  pipeRun(k, [[g.xD1 + 0.04, yTm, 0], [g.xD1 + 0.28, yTm, 0], [g.xD1 + 0.28, yp, 0], [g.xD1 + 0.28, yp, zP], [g.xF3 - 0.1, yp, zP]], np)\n  transmitter(k, [g.xD1 + 0.28 + od / 2, (yTm + yp) / 2, 0], [1, 0, 0], 0.06)\n  transmitter(k, [(g.xD1 + 0.28 + g.xF3) / 2, yp + od / 2, zP], [0, 1, 0], 0.08, 'aluminium') // dew-point transmitter\n  k.box('stainless', [0.08, 0.05, 0.05], [g.xD1 + 0.28, (yTm + yp) / 2 - 0.25, od / 2 + 0.03])\n\n  // ---------------------------------------------------------------- air receiver\n  const R = vVessel(k, g.xR, 0, g.yTL, p.receiverDiameter, p.receiverHeight, g.wall, 'equipmentPaint')\n  vesselLegs(k, g.xR, 0, g.Ro, g.yTL + 0.15, y0, 3, 'equipmentPaint', Math.PI / 2)\n  const yIn = g.yTL + p.receiverHeight * 0.3\n  const inFace = nozzle(k, { base: [g.xR - g.Ro, yIn, 0], dir: [-1, 0, 0], nps: np, rating: RATING, standout: 0.2, mat: 'equipmentPaint', studs: false })\n  const inWeld = mateFlange(k, inFace, [-1, 0, 0], np, RATING)\n  pipeRun(k, [[g.xF3 + 0.1, yp, zP], [g.xF3 + 0.25, yp, zP], [g.xF3 + 0.25, yIn, zP], [g.xF3 + 0.25, yIn, 0], inWeld], np)\n  pipeSupport(k, [g.xF3 + 0.25, yIn, zP * 0.5], od, y0, 'z')\n  // outlet: nozzle neck, ball valve, battery limit\n  const xo0 = g.xR + g.Ro - 0.02\n  const xo1 = g.xR + g.Ro + 0.22\n  k.pipe('equipmentPaint', [xo0, g.yo, 0], [xo1, g.yo, 0], pipeOD(p.outletNps), 0.005)\n  valve(k, 'ball', [xo1 + g.Sv / 2, g.yo, 0], [1, 0, 0], p.outletNps, RATING)\n  const w = blFlange(k, [L / 2, g.yo, 0], [1, 0, 0], p.outletNps, RATING)\n  pipeRun(k, [[xo1 + g.Sv, g.yo, 0], w], p.outletNps)\n  // relief valve, gauge, transmitter, inspection opening, auto drain\n  const top = R.yTop\n  k.pipe('equipmentPaint', [g.xR, top - 0.02, 0], [g.xR, top + 0.08, 0], 0.06, 0.005)\n  const po = smallPsv(k, [g.xR, top + 0.08, 0], [0, 0, 1], 0.03)\n  k.tube('pipePaint', [po, addv(po, [0, 0, 1], 0.08), addv(addv(po, [0, 0, 1], 0.08), [0, 1, 0], 0.12)], 0.02, 10, 0.05)\n  k.tube('pipePaint', [[g.xR + 0.25, top - 0.08, 0], [g.xR + 0.25, top + 0.12, 0]], 0.012, 8)\n  gauge(k, [g.xR + 0.25, top + 0.18, 0.02], 'z', 0.12, 'bar', 16)\n  transmitter(k, [g.xR - g.Ro * 0.7, g.yTL + p.receiverHeight * 0.7, g.Ro * 0.7], [-0.7, 0, 0.7], 0.12)\n  manway(k, [g.xR, g.yTL + 0.45, g.Ro], [0, 0, 1], 0.15, 12, RATING)\n  k.tube('pipePaint', [[g.xR, R.yBot + 0.01, 0], [g.xR, y0 + 0.2, 0], [g.xR, y0 + 0.2, -g.Ro - 0.1]], 0.012, 8, 0.04)\n  smallValve(k, 'ball', [g.xR, y0 + 0.2, -g.Ro * 0.5], [0, 0, -1], 0.01)\n  k.rbox('rubberBlack', [0.12, 0.14, 0.1], 0.015, [g.xR, y0 + 0.2, -g.Ro - 0.16])\n  tagPlate(k, 'ASME VIII-1', [g.xR - g.Ro * 0.5, g.yTL + p.receiverHeight * 0.45, g.Ro * 0.87 + 0.002], [-0.5, 0, 0.87], 0.16)\n  shellLabel(k, 'INSTRUMENT AIR', g.xR, g.yTL + p.receiverHeight * 0.6, 0, g.Ro, g.Ro * 0.22)\n\n  // ---------------------------------------------------------------- LCP and cable tray along the back\n  const zb = -W / 2 + 0.15\n  const gl = localPanel(k, [g.xD0 - 0.1, y0, -W / 2 + 0.42], [0, 0, -1], { w: 0.5, h: 0.6, top: 1.8, title: 'IA PACKAGE LCP', buttons: 4 })\n  cableTray(k, [[g.xD0 - 0.1, gl[1] - 0.04, gl[2]], [g.xD0 - 0.1, y0 + 0.2, gl[2]], [g.xD0 - 0.1, y0 + 0.2, zb], [ex + encL * 0.3, y0 + 0.2, zb]], [1, 0, 0], 0.15, 2)\n  k.spline('cable', [[ex + encL * 0.3, y0 + 0.22, zb], [ex + encL * 0.3, y0 + 0.4, ez - encW / 2 - 0.08], [ex + encL * 0.3, yb + 0.37, ez - encW / 2 - 0.06]], 0.012, 6, 16)\n  k.spline('cable', [[g.xD0 - 0.05, y0 + 0.22, zb], [xm, y0 + 0.4, 0.1], [xm, tTL + 0.25, 0.42]], 0.008, 6, 16)\n  return { built: k.build(), rotors }\n}\n"
    },
    {
      "path": "packages/_skid.ts",
      "type": "registry:file",
      "target": "components/deck-twin/packages/_skid.ts",
      "content": "// Shared package-skid parts: battery-limit flanges, in-kit valves, instruments, local panels, cable tray, supports, vessels, drip pans.\nimport * as THREE from 'three'\nimport { Kit, type MatKey, type V3 } from '../lib/kit'\nimport { flange, flangedJoint, gasket, gauge, member } from '../lib/parts'\nimport { faceToFace, flange as flangeDims, handwheelDia, headDepth, pipeOD, pipeWall, type Rating } from '../lib/standards'\nimport { lcdMaterial, textMaterial } from '../lib/textures'\n\nconst V = (v: V3) => new THREE.Vector3(...v)\nconst arr = (v: THREE.Vector3) => v.toArray() as V3\nexport const addv = (a: V3, d: V3, s = 1): V3 => [a[0] + d[0] * s, a[1] + d[1] * s, a[2] + d[2] * s]\n\n/** Local frame with +X along `dir` and +Y as close to `up` as possible, origin at `pos`. */\nexport function frame(pos: V3, dir: V3, up: V3 = [0, 1, 0]) {\n  const x = V(dir).normalize()\n  let u = V(up).normalize()\n  if (Math.abs(u.dot(x)) > 0.99) u = Math.abs(x.y) > 0.9 ? new THREE.Vector3(0, 0, 1) : new THREE.Vector3(0, 1, 0)\n  const z = new THREE.Vector3().crossVectors(x, u).normalize()\n  const y = new THREE.Vector3().crossVectors(z, x).normalize()\n  return new THREE.Matrix4().makeBasis(x, y, z).setPosition(V(pos))\n}\n\n/** Battery-limit weld-neck flange with studs, face at `face` pointing along `dir`. Returns the weld end for the neck pipe. */\nexport function blFlange(k: Kit, face: V3, dir: V3, nps: number, rating: Rating, studs = true): V3 {\n  const L = flange(k, nps, rating, face, dir, studs)\n  liner(k, nps, face, dir, L)\n  return addv(face, dir, -L)\n}\n\n/** Bore lining through a weld-neck flange (face to weld end) so a flange reads hollow when looked into. */\nexport function liner(k: Kit, nps: number, face: V3, dir: V3, len: number) {\n  const ro = pipeOD(nps) / 2\n  const ri = ro - pipeWall(nps, 'STD')\n  k.lathe('machined', [[ro * 0.88, 0], [ri, 0]], face, dir, 24)\n  k.lathe('pipeBore', [[ri, 0], [ri, -len]], face, dir, 24)\n}\n\nexport type ValveKind = 'ball' | 'gate' | 'globe' | 'check'\n\n/** Overall length of an in-kit flanged valve including both mating pipe flanges (weld end to weld end). */\nexport function valveSpan(kind: ValveKind, nps: number, rating: Rating) {\n  const f = flangeDims(nps, rating)\n  const fam = kind === 'ball' ? 'ball-full' : kind === 'check' ? 'swing-check' : kind\n  return faceToFace(fam, nps, rating) + 2 * (0.0045 + f.hubLength + f.raisedFaceHeight)\n}\n\n/**\n * Flanged valve centred at `pos` on a line along `dir`, operator towards `up`. Both mating pipe flanges, gaskets\n * and studs are included, so the line pipe stops at pos ± dir·valveSpan/2.\n */\nexport function valve(k: Kit, kind: ValveKind, pos: V3, dir: V3, nps: number, rating: Rating, up: V3 = [0, 1, 0], body: MatKey = 'valveBody', open = 1, op: 'manual' | 'mov' | 'diaphragm' = 'manual') {\n  const fam = kind === 'ball' ? 'ball-full' : kind === 'check' ? 'swing-check' : kind\n  const L = faceToFace(fam, nps, rating)\n  const f = flangeDims(nps, rating)\n  const D = pipeOD(nps)\n  const fl = f.thickness + f.raisedFaceHeight\n  k.with(frame(pos, dir, up), () => {\n    spoolJoint(k, [L / 2 + 0.00225, 0, 0], [1, 0, 0], nps, rating)\n    spoolJoint(k, [-L / 2 - 0.00225, 0, 0], [-1, 0, 0], nps, rating)\n    const inner = L / 2 - fl\n    const ri = D / 2 - pipeWall(nps, 'STD')\n    k.pipe(body, [-inner - 0.002, 0, 0], [inner + 0.002, 0, 0], D * 1.24, D * 0.62 - ri + 0.003, 28)\n    if (kind === 'ball') {\n      k.sphere(body, D * 0.82, [0, 0, 0], [1.05, 1, 1], 28)\n      for (const s of [-1, 1]) k.cyl(body, D * 0.78, 0.012, [s * D * 0.55, 0, 0], 'x', 28)\n      k.around(8, D * 0.7, [D * 0.55, 0, 0], 'x', (p) => k.hex('nut', 0.016, 0.01, addv(p, [0.008, 0, 0])))\n      const yTop = D * 0.95\n      k.cyl(body, D * 0.3, yTop - D * 0.6, [0, (yTop + D * 0.6) / 2, 0], 'y', 16)\n      k.cyl(body, D * 0.36, 0.012, [0, yTop, 0], 'y', 16)\n      if (op === 'mov') movActuator(k, yTop, D, body)\n      else if (nps <= 4) {\n        const lever = Math.max(0.15, handwheelDia('ball-full', nps, rating))\n        const a = (1 - open) * (Math.PI / 2)\n        k.cyl('nut', D * 0.12, 0.04, [0, yTop + 0.02, 0], 'y', 10)\n        k.box('actuatorRed', [lever, 0.012, 0.03], [(Math.cos(a) * lever) / 2 - Math.cos(a) * 0.02, yTop + 0.045, (-Math.sin(a) * lever) / 2], new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0, 1, 0), a))\n      } else {\n        const gb = Math.max(0.12, D * 0.7)\n        k.rbox(body, [gb, gb * 0.6, gb * 0.8], gb * 0.08, [0, yTop + gb * 0.3, 0])\n        k.cyl(body, gb * 0.15, gb * 0.5, [0, yTop + gb * 0.3, gb * 0.6], 'z', 12)\n        k.handwheel('handwheel', Math.max(0.3, gb * 1.8), [0, yTop + gb * 0.3, gb * 0.85], 'z', 5)\n      }\n    } else if (kind === 'check') {\n      k.sphere(body, D * 0.78, [0, 0, 0], [1.25, 1, 0.95], 24)\n      const yc = D * 0.72\n      k.cyl(body, D * 0.62, 0.04, [0, yc, 0], 'y', 24)\n      k.cyl(body, D * 0.66, 0.025, [0, yc + 0.032, 0], 'y', 24)\n      k.around(8, D * 0.58, [0, yc + 0.045, 0], 'y', (p) => k.hex('nut', 0.018, 0.012, p))\n      k.box('stainless', [D * 0.5, 0.002, D * 0.25], [0, 0, D * 0.79])\n    } else {\n      // gate / globe: bolted bonnet, yoke, rising stem, handwheel\n      if (kind === 'globe') k.sphere(body, D * 0.85, [0, 0, 0], [1.2, 1, 0.95], 24)\n      else k.add(body, new THREE.CylinderGeometry(1, 1, D * 1.5, 28), new THREE.Matrix4().compose(new THREE.Vector3(0, D * 0.15, 0), new THREE.Quaternion(), new THREE.Vector3(D * 0.62, 1, D * 0.72)))\n      const yb = kind === 'globe' ? D * 0.8 : D * 0.9\n      k.cyl(body, D * 0.62, 0.03, [0, yb, 0], 'y', 24)\n      k.around(8, D * 0.55, [0, yb + 0.02, 0], 'y', (p) => k.hex('nut', 0.018, 0.012, p))\n      const hB = Math.max(0.08, D * 0.9)\n      k.cyl(body, D * 0.3, hB, [0, yb + hB / 2, 0], 'y', 16, D * 0.22)\n      const yoke = Math.max(0.12, D * 1.3)\n      const y0 = yb + hB\n      for (const s of [-1, 1]) k.box(body, [Math.max(0.012, D * 0.12), yoke, Math.max(0.012, D * 0.1)], [s * D * 0.28, y0 + yoke / 2, 0])\n      k.box(body, [D * 0.7, Math.max(0.016, D * 0.12), D * 0.2], [0, y0 + yoke, 0])\n      if (op === 'diaphragm') {\n        // spring-opposed diaphragm actuator with positioner\n        const Ra = THREE.MathUtils.clamp(D * 1.6, 0.14, 0.3)\n        const ya = y0 + yoke + 0.02\n        k.cyl('stainless', Math.max(0.006, D * 0.05), yoke * 0.8, [0, y0 + yoke * 0.5, 0], 'y', 10)\n        k.lathe('actuatorBlue', [[0.02, 0], [Ra * 0.9, 0], [Ra, Ra * 0.12], [Ra, Ra * 0.18], [Ra * 0.9, Ra * 0.2]], [0, ya, 0], 'y', 32)\n        k.lathe('actuatorBlue', [[Ra * 0.9, Ra * 0.2], [Ra, Ra * 0.22], [Ra, Ra * 0.28], [Ra * 0.7, Ra * 0.55], [0.02, Ra * 0.6]], [0, ya, 0], 'y', 32)\n        k.around(12, Ra * 0.95, [0, ya + Ra * 0.2, 0], 'y', (p) => k.hex('nut', 0.014, 0.012, p))\n        k.rbox('aluminium', [0.1, 0.12, 0.06], 0.01, [D * 0.35 + 0.05, y0 + yoke * 0.5, 0.04])\n        k.tube('tubing', [[D * 0.35 + 0.05, y0 + yoke * 0.5 + 0.06, 0.04], [D * 0.35 + 0.05, ya + Ra * 0.4, 0.04], [0.02, ya + Ra * 0.62, 0.04]], 0.004, 6, 0.02)\n      } else {\n        const stemTop = y0 + yoke + 0.04 + open * D * 0.6\n        k.cyl('stainless', Math.max(0.006, D * 0.05), stemTop - y0, [0, (stemTop + y0) / 2, 0], 'y', 10)\n        k.handwheel('handwheel', Math.max(0.16, handwheelDia(kind, nps, rating)), [0, y0 + yoke + 0.04, 0], 'y', 4)\n      }\n    }\n    k.box('stainless', [D * 0.45, D * 0.2, 0.002], [0, -D * 0.2, D * 0.63])\n  })\n  return valveSpan(kind, nps, rating)\n}\n\n/** Electric multi-turn actuator on a gearbox (valve-local frame, stem +Y from `y`). */\nfunction movActuator(k: Kit, y: number, D: number, body: MatKey) {\n  const s = THREE.MathUtils.clamp(D * 1.8, 0.45, 1.2)\n  k.cyl(body, D * 0.36, 0.06 * s, [0, y + 0.03 * s, 0], 'y', 20)\n  k.rbox(body, [0.24 * s, 0.2 * s, 0.26 * s], 0.02 * s, [0, y + 0.16 * s, 0])\n  k.rbox('actuatorBlue', [0.2 * s, 0.26 * s, 0.22 * s], 0.025 * s, [0, y + 0.39 * s, 0])\n  k.cyl('actuatorBlue', 0.08 * s, 0.28 * s, [0, y + 0.37 * s, 0.24 * s], 'z', 20)\n  k.cyl('actuatorBlue', 0.085 * s, 0.03 * s, [0, y + 0.37 * s, 0.38 * s], 'z', 20)\n  k.rbox('actuatorBlue', [0.16 * s, 0.1 * s, 0.14 * s], 0.015 * s, [0, y + 0.57 * s, 0])\n  k.disc('glass', 0.035 * s, [0, y + 0.39 * s, 0.111 * s], 'z', 18)\n  k.handwheel('handwheel', 0.3 * s, [-0.16 * s, y + 0.39 * s, 0], '-x', 4)\n  for (const dx of [-0.05, 0.05]) k.cyl('brass', 0.012 * s, 0.04 * s, [dx * s, y + 0.25 * s, -0.12 * s], 'z', 8)\n}\n\n/** Small-bore instrument / tubing valve (needle or ball) on a line along `dir`, handle towards `up`. Body length ≈ 8 r. */\nexport function smallValve(k: Kit, kind: 'needle' | 'ball', pos: V3, dir: V3, r: number, up: V3 = [0, 1, 0], mat: MatKey = 'stainless') {\n  const b = Math.max(0.012, r * 2.2)\n  k.with(frame(pos, dir, up), () => {\n    k.box(mat, [b * 2.6, b * 1.4, b * 1.4], [0, 0, 0])\n    for (const s of [-1, 1]) k.hex(mat, b * 1.25, b * 0.8, [s * b * 1.6, 0, 0], 'x')\n    if (kind === 'needle') {\n      k.cyl(mat, b * 0.45, b * 1.6, [0, b * 1.4, 0], 'y', 10)\n      k.hex(mat, b * 1.1, b * 0.5, [0, b * 1.1, 0], 'y')\n      k.box('handwheel', [b * 2.2, b * 0.35, b * 0.4], [0, b * 2.25, 0])\n    } else {\n      k.cyl(mat, b * 0.35, b * 0.8, [0, b * 1.0, 0], 'y', 10)\n      k.box('actuatorRed', [b * 4, b * 0.25, b * 0.6], [b * 1.6, b * 1.45, 0])\n    }\n  })\n}\n\n/** Small conventional relief valve: inlet at `inlet` going up (+Y), outlet towards `out`. Returns the outlet connection point. */\nexport function smallPsv(k: Kit, inlet: V3, out: V3, size = 0.025, body: MatKey = 'stainless', bonnet: MatKey = 'actuatorRed') {\n  const s = size\n  const o = V(out).normalize()\n  const c = addv(inlet, [0, 1, 0], s * 2.2)\n  k.hex(body, s * 1.6, s * 0.9, addv(inlet, [0, 1, 0], s * 0.45))\n  k.cyl(body, s * 1.0, s * 2.4, addv(c, [0, -1, 0], s * 0.3), 'y', 16)\n  k.sphere(body, s * 1.15, c, undefined, 14)\n  const oc = addv(c, arr(o), s * 1.4)\n  k.rod(body, c, oc, s * 0.7, 12)\n  k.hex(body, s * 1.6, s * 0.9, addv(c, arr(o), s * 1.9), arr(o))\n  k.cyl(bonnet, s * 0.75, s * 3.2, addv(c, [0, 1, 0], s * 2.4), 'y', 14, s * 0.55)\n  k.cyl(bonnet, s * 0.6, s * 0.9, addv(c, [0, 1, 0], s * 4.4), 'y', 12, s * 0.4)\n  k.box('nut', [s * 2.2, s * 0.2, s * 0.35], addv(c, [0, 1, 0], s * 4.2))\n  k.box('stainless', [s * 0.03 + 0.012, s * 1.2, 0.0015], addv(addv(c, [0, 1, 0], s * 2.4), [0, 0, 1], s * 0.8))\n  return addv(c, arr(o), s * 2.35)\n}\n\n/** Pressure transmitter (coplanar, 2-valve manifold) on an impulse stub from `tap` along `n`; dual-compartment head with LCD. */\nexport function transmitter(k: Kit, tap: V3, n: V3, standoff = 0.1, housing: MatKey = 'actuatorBlue') {\n  const d = V(n).normalize()\n  const m = addv(tap, arr(d), standoff)\n  k.rod('tubing', tap, m, 0.007, 8)\n  k.with(frame(m, arr(d)), () => {\n    k.box('stainless', [0.05, 0.05, 0.07], [0.025, 0, 0])\n    for (const s of [-1, 1]) k.cyl('handwheel', 0.006, 0.04, [0.025, 0, s * 0.055], 'z', 6)\n    k.box('stainless', [0.03, 0.06, 0.06], [0.065, 0.01, 0])\n    k.cyl('stainless', 0.03, 0.07, [0.07, 0.075, 0], 'y', 16)\n    k.cyl(housing, 0.042, 0.1, [0.07, 0.15, 0], 'x', 20)\n    for (const s of [-1, 1]) k.cyl(housing, 0.046, 0.022, [0.07 + s * 0.06, 0.15, 0], 'x', 20)\n    k.disc(lcdMaterial(), 0.03, [0.132, 0.15, 0], 'x', 20)\n    k.disc('glass', 0.034, [0.133, 0.15, 0], 'x', 20)\n    k.cyl('brass', 0.011, 0.03, [0.07, 0.15, 0.055], 'z', 8)\n  })\n}\n\n/** Thermowell with transmitter head, inserted at `at` on a pipe, head out along `n`. */\nexport function tempElement(k: Kit, at: V3, n: V3, od: number) {\n  const d = V(n).normalize()\n  const base = addv(at, arr(d), od / 2)\n  k.with(frame(base, arr(d)), () => {\n    k.cyl('stainless', 0.02, 0.04, [0.02, 0, 0], 'x', 12)\n    k.hex('stainless', 0.032, 0.02, [0.05, 0, 0], 'x')\n    k.cyl('stainless', 0.008, 0.06, [0.09, 0, 0], 'x', 8)\n    k.cyl('aluminium', 0.04, 0.06, [0.15, 0, 0], 'x', 18)\n    k.cyl('aluminium', 0.043, 0.015, [0.185, 0, 0], 'x', 18)\n    k.cyl('brass', 0.009, 0.025, [0.15, -0.045, 0], 'y', 8)\n  })\n}\n\n/** Instrument tapping with root valve and pressure gauge, from `tap` along `n`. */\nexport function gaugeTap(k: Kit, tap: V3, n: V3, max = 100, d = 0.1, unit: 'bar' | '°C' = 'bar') {\n  const v = V(n).normalize()\n  const a = addv(tap, arr(v), 0.05)\n  k.rod('tubing', tap, addv(tap, arr(v), 0.12), 0.007, 8)\n  smallValve(k, 'needle', a, arr(v), 0.006, Math.abs(v.y) > 0.9 ? [0, 0, 1] : [0, 1, 0])\n  const g = addv(tap, arr(v), 0.12 + d * 0.16)\n  const face: V3 = Math.abs(v.y) > 0.9 ? [0, 0, 1] : arr(v)\n  if (Math.abs(v.y) > 0.9) {\n    k.rod('tubing', addv(tap, arr(v), 0.12), addv(addv(tap, arr(v), 0.12), [0, 0, 1], 0.001), 0.007, 8)\n    gauge(k, addv(tap, arr(v), 0.12 + d / 2), face, d, unit, max)\n  } else gauge(k, g, face, d, unit, max)\n}\n\n/** Ladder cable tray along a polyline. Horizontal runs lie flat; vertical runs use `side` (horizontal) as the width direction. */\nexport function cableTray(k: Kit, pts: V3[], side: V3, w = 0.15, cables = 3) {\n  const sv = V(side).normalize()\n  const UP = new THREE.Vector3(0, 1, 0)\n  const sideOf = (d: THREE.Vector3) => (Math.abs(d.y) > 0.9 ? sv.clone() : new THREE.Vector3().crossVectors(UP, d).normalize())\n  const segs: { a: THREE.Vector3; d: THREE.Vector3; L: number; s: THREE.Vector3; n: THREE.Vector3 }[] = []\n  for (let i = 0; i < pts.length - 1; i++) {\n    const a = V(pts[i])\n    const d = V(pts[i + 1]).sub(a)\n    const L = d.length()\n    if (L < 1e-4) continue\n    d.normalize()\n    const s = sideOf(d)\n    let n = new THREE.Vector3().crossVectors(s, d).normalize()\n    if (Math.abs(d.y) < 0.9 && n.y < 0) n = n.negate()\n    segs.push({ a, d, L, s, n })\n  }\n  for (const { a, d, L, s, n } of segs) {\n    const q = new THREE.Quaternion().setFromRotationMatrix(new THREE.Matrix4().makeBasis(d, n, new THREE.Vector3().crossVectors(d, n)))\n    const mid = a.clone().addScaledVector(d, L / 2)\n    for (const sg of [-1, 1]) k.box('cableTray', [L + 0.01, 0.05, 0.003], arr(mid.clone().addScaledVector(s, (sg * w) / 2).addScaledVector(n, 0.02)), q)\n    const nr = Math.max(1, Math.floor(L / 0.25))\n    for (let j = 0; j <= nr; j++) k.box('cableTray', [0.02, 0.006, w], arr(a.clone().addScaledVector(d, (j / nr) * L).addScaledVector(n, 0.003)), q)\n  }\n  for (let c = 0; c < cables; c++) {\n    const off = ((c + 0.5) / cables - 0.5) * w * 0.7\n    const P: V3[] = []\n    segs.forEach(({ a, d, L, s, n }, i) => {\n      if (i === 0) P.push(arr(a.clone().addScaledVector(s, off).addScaledVector(n, 0.014)))\n      P.push(arr(a.clone().addScaledVector(d, L).addScaledVector(s, off).addScaledVector(n, 0.014)))\n    })\n    k.tube('cable', P, 0.008, 6, 0.08)\n  }\n}\n\n/**\n * Local control panel on two posts, door facing `n` (±X or ±Z), standing on the deck at `base`.\n * Returns the cable-gland point under the enclosure (for a tray run).\n */\nexport function localPanel(k: Kit, base: V3, n: V3, opts: { w?: number; h?: number; top?: number; title?: string; screen?: boolean; buttons?: number } = {}) {\n  const w = opts.w ?? 0.6\n  const h = opts.h ?? 0.7\n  const top = opts.top ?? 1.75\n  const dep = 0.25\n  const nn = V(n).normalize()\n  const side = new THREE.Vector3(0, 1, 0).cross(nn).normalize()\n  const q = new THREE.Quaternion().setFromUnitVectors(new THREE.Vector3(0, 0, 1), nn)\n  const at = (x: number, y: number, z: number) => arr(V(base).addScaledVector(side, x).add(new THREE.Vector3(0, y, 0)).addScaledVector(nn, z))\n  for (const s of [-1, 1]) {\n    member(k, at(s * (w / 2 - 0.05), 0, -0.05), at(s * (w / 2 - 0.05), top + 0.15, -0.05), 'UPN 80', 'galvanised', arr(nn))\n    k.box('galvanised', [0.16, 0.012, 0.16], at(s * (w / 2 - 0.05), 0.006, -0.05), q)\n  }\n  for (const y of [0.35, top - h - 0.05]) member(k, at(-w / 2, y, -0.03), at(w / 2, y, -0.03), 'L50x50x5', 'galvanised', [0, 1, 0])\n  const yc = top - h / 2\n  k.rbox('stainless', [w, h, dep], 0.015, at(0, yc, dep / 2), q)\n  k.rbox('stainless', [w - 0.03, h - 0.03, 0.012], 0.006, at(0, yc, dep + 0.006), q)\n  for (const s of [-0.3, 0.3]) k.box('nut', [0.02, 0.06, 0.012], at(w / 2 - 0.04, yc + s * h, dep + 0.016), q)\n  k.box('stainless', [w + 0.12, 0.01, dep + 0.2], at(0, top + 0.1, dep / 2 + 0.03), new THREE.Quaternion().setFromUnitVectors(new THREE.Vector3(0, 0, 1), nn).multiply(new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(1, 0, 0), 0.12)))\n  const fz = dep + 0.013\n  if (opts.screen !== false) {\n    k.box('rubberBlack', [w * 0.5, h * 0.3, 0.006], at(0, yc + h * 0.18, fz), q)\n    k.plane(lcdMaterial(), w * 0.45, h * 0.26, at(0, yc + h * 0.18, fz + 0.0035), q)\n  }\n  const nb = opts.buttons ?? 3\n  const mats: MatKey[] = ['safetyGreen', 'actuatorRed', 'actuatorYellow', 'lampLens', 'safetyGreen', 'actuatorRed']\n  for (let i = 0; i < nb; i++) k.cyl(mats[i % mats.length], 0.016, 0.02, at(-w * 0.3 + (i * w * 0.6) / Math.max(1, nb - 1), yc - h * 0.18, fz + 0.01), arr(nn), 14)\n  k.cyl('actuatorYellow', 0.04, 0.004, at(w * 0.3, yc - h * 0.36, fz), arr(nn), 20)\n  k.dome('actuatorRed', 0.025, at(w * 0.3, yc - h * 0.36, fz + 0.01), arr(nn), Math.PI / 2, 0.7, 16)\n  if (opts.title) k.plane(textMaterial(opts.title, '#f2f2ee', '#111', 512, 96), w * 0.7, w * 0.13, at(0, yc + h * 0.42, fz + 0.001), q)\n  for (let i = 0; i < 4; i++) k.cyl('brass', 0.012, 0.035, at(-w * 0.3 + i * w * 0.2, top - h - 0.015, dep / 2), 'y', 8)\n  return at(0, top - h - 0.04, dep / 2)\n}\n\n/** Pipe stanchion from the deck to under a pipe centred at `at`, with saddle plate and U-bolt. Pipe runs along `along`. */\nexport function pipeSupport(k: Kit, at: V3, od: number, deckY: number, along: 'x' | 'z', mat: MatKey = 'galvanised') {\n  const top = at[1] - od / 2 - 0.006\n  if (top - deckY < 0.05) return\n  const big = od > 0.12\n  const sec = big ? 'HEB 100' : 'L50x50x5'\n  member(k, [at[0], deckY, at[2]], [at[0], top - 0.01, at[2]], sec, mat, along === 'x' ? [1, 0, 0] : [0, 0, 1])\n  const w = Math.max(0.1, od + 0.06)\n  k.box(mat, along === 'x' ? [0.1, 0.012, w] : [w, 0.012, 0.1], [at[0], top - 0.004, at[2]])\n  k.box(mat, [0.16, 0.012, 0.16], [at[0], deckY + 0.006, at[2]])\n  k.torus('boltXylan', od / 2 + 0.006, Math.max(0.004, od * 0.03), [at[0], at[1], at[2]], along === 'x' ? 'x' : 'z', 6, 20, Math.PI)\n  for (const s of [-1, 1]) {\n    const p: V3 = along === 'x' ? [at[0], top + 0.004, at[2] + s * (od / 2 + 0.006)] : [at[0] + s * (od / 2 + 0.006), top + 0.004, at[2]]\n    k.hex('nut', Math.max(0.014, od * 0.12), 0.01, p)\n  }\n}\n\nexport interface VesselDims {\n  Ro: number\n  hd: number\n  /** bottom of the lower head */\n  yBot: number\n  /** top of the upper head */\n  yTop: number\n}\n\n/** Vertical 2:1 ellipsoidal-head vessel, bottom tangent line at `yTL`, with girth seams. */\nexport function vVessel(k: Kit, x: number, z: number, yTL: number, id: number, tt: number, wall: number, mat: MatKey = 'equipmentPaint', seg = 48): VesselDims {\n  const Ro = id / 2 + wall\n  const hd = headDepth('2:1-ellipsoidal', id) + wall\n  const prof: [number, number][] = [[0, -hd]]\n  for (let i = 1; i <= 12; i++) {\n    const t = (i / 12) * (Math.PI / 2)\n    prof.push([Ro * Math.sin(t), -hd * Math.cos(t)])\n  }\n  for (let i = 0; i <= 12; i++) {\n    const t = (i / 12) * (Math.PI / 2)\n    prof.push([Ro * Math.cos(t), tt + hd * Math.sin(t)])\n  }\n  k.lathe(mat, prof, [x, yTL, z], 'y', seg)\n  for (const y of [0, tt]) k.torus(mat, Ro + 0.0008, Math.max(0.003, Ro * 0.008), [x, yTL + y, z], 'y', 6, seg)\n  return { Ro, hd, yBot: yTL - hd, yTop: yTL + tt + hd }\n}\n\n/** Angle or pipe legs welded to a vertical shell, with base plates and anchor nuts. */\nexport function vesselLegs(k: Kit, x: number, z: number, Ro: number, yAttach: number, deckY: number, n = 4, mat: MatKey = 'equipmentPaint', phase = Math.PI / 4) {\n  const lr = Math.max(0.03, Ro * 0.12)\n  for (let i = 0; i < n; i++) {\n    const a = phase + (i / n) * Math.PI * 2\n    const px = x + Math.cos(a) * (Ro + lr * 0.6)\n    const pz = z + Math.sin(a) * (Ro + lr * 0.6)\n    k.cyl(mat, lr, yAttach - deckY, [px, (yAttach + deckY) / 2, pz], 'y', 12)\n    k.box(mat, [0.01, Math.min(0.3, (yAttach - deckY) * 0.3), lr * 2.4], [x + Math.cos(a) * (Ro + 0.005), yAttach - 0.1, z + Math.sin(a) * (Ro + 0.005)], new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0, 1, 0), -a))\n    const bp = lr * 3.2\n    k.box(mat, [bp, 0.014, bp], [px, deckY + 0.007, pz])\n    for (const s of [-1, 1]) k.hex('nut', 0.026, 0.016, [px + s * bp * 0.32, deckY + 0.022, pz + s * bp * 0.32])\n  }\n}\n\n/** Bunded drip tray: floor plate, upstand rim and a drain coupling on the -X end. */\nexport function dripPan(k: Kit, cx: number, cz: number, sx: number, sz: number, y: number, rim = 0.06, mat: MatKey = 'stainless') {\n  k.box(mat, [sx, 0.005, sz], [cx, y + 0.0025, cz])\n  for (const s of [-1, 1]) {\n    k.box(mat, [sx, rim, 0.004], [cx, y + rim / 2, cz + s * (sz / 2 - 0.002)])\n    k.box(mat, [0.004, rim, sz], [cx + s * (sx / 2 - 0.002), y + rim / 2, cz])\n  }\n  k.cyl(mat, 0.016, 0.06, [cx - sx / 2 - 0.02, y + 0.02, cz], 'x', 10)\n  k.hex('nut', 0.03, 0.02, [cx - sx / 2 - 0.05, y + 0.02, cz], 'x')\n}\n\n/** Brass earth boss on a steel face. */\nexport function earthBoss(k: Kit, pos: V3, n: V3) {\n  k.cyl('brass', 0.014, 0.025, pos, n, 10)\n  k.hex('brass', 0.024, 0.008, addv(pos, n, 0.012), n)\n}\n\n/** Flanged spool joint inside the skid piping (both flanges, gasket, studs), centred at `pos` along `dir`. */\nexport function spoolJoint(k: Kit, pos: V3, dir: V3, nps: number, rating: Rating) {\n  flangedJoint(k, nps, rating, pos, dir)\n  const f = flangeDims(nps, rating)\n  const L = f.hubLength + f.raisedFaceHeight\n  liner(k, nps, addv(pos, dir, -0.00225), dir, L)\n  liner(k, nps, addv(pos, dir, 0.00225), [-dir[0], -dir[1], -dir[2]], L)\n}\n\n/** Curved painted label band on a vertical shell (axis +Y at x, z), centred on the +Z side, `h` tall over `arc` radians. */\nexport function shellLabel(k: Kit, text: string, x: number, y: number, z: number, Ro: number, h: number, arc = 1.1, bg = '#1f5fa0', fg = '#ffffff') {\n  k.add(textMaterial(text, bg, fg, 512, Math.round((512 * h) / (Ro * arc))), new THREE.CylinderGeometry(Ro + 0.003, Ro + 0.003, h, 24, 1, true, -arc / 2, arc), new THREE.Matrix4().makeTranslation(x, y, z))\n}\n\n/** Open mouth where a branch meets a run or shell: dark bore disc on the surface at `at` facing `dir`, plus the fillet weld. */\nexport function branchMouth(k: Kit, at: V3, dir: V3, nps: number, wall = 0.006) {\n  const r = pipeOD(nps) / 2\n  k.disc('pipeBore', r - wall, addv(at, dir, 0.0012), dir, 24)\n  k.torus('flangeSteel', r + 0.001, Math.max(0.003, r * 0.06), addv(at, dir, 0.002), dir, 6, 24)\n}\n\n/** Bow shackles with screw pins through the four lib `skid()` padeyes (skid of length L, width W, deck top `deckY`). */\nexport function padeyeShackles(k: Kit, L: number, W: number, deckY: number) {\n  for (const sx of [-1, 1])\n    for (const sz of [-1, 1]) {\n      const x = sx * (L / 2 - 0.25)\n      const z = sz * (W / 2 - 0.03)\n      const hy = deckY + 0.078\n      k.rod('galvanised', [x, hy, z - 0.05], [x, hy, z + 0.05], 0.011, 10)\n      k.hex('nut', 0.03, 0.016, [x, hy, z - 0.055], 'z')\n      k.cyl('galvanised', 0.02, 0.012, [x, hy, z + 0.055], 'z', 12)\n      k.tube('actuatorRed', [[x, hy, z - 0.042], [x, hy + 0.11, z - 0.042], [x, hy + 0.11, z + 0.042], [x, hy, z + 0.042]], 0.011, 8, 0.04)\n    }\n}\n\n/** Basket strainer on a line along +X centred at `pos` (flanged ends are spool joints at ±len/2), with pot, cover, drain and DP gauge. */\nexport function basketStrainer(k: Kit, pos: V3, nps: number, rating: Rating, len: number, mat: MatKey = 'valveBody') {\n  const D = pipeOD(nps)\n  const f = flangeDims(nps, rating)\n  const fl = f.hubLength + f.raisedFaceHeight\n  const [x, y, z] = pos\n  for (const s of [-1, 1]) spoolJoint(k, [x + (s * len) / 2, y, z], [s, 0, 0], nps, rating)\n  const inner = len / 2 - fl\n  k.pipe(mat, [x - inner - 0.002, y, z], [x + inner + 0.002, y, z], D * 1.1, D * 0.05 + 0.004, 28)\n  const R = D * 0.85\n  k.cyl(mat, R, D * 1.9, [x, y + D * 0.15, z], 'y', 32)\n  k.dome(mat, R, [x, y - D * 0.8, z], '-y', Math.PI / 2, 0.6, 32)\n  const yc = y + D * 1.1\n  k.cyl(mat, R + 0.05, 0.05, [x, yc, z], 'y', 32)\n  k.cyl(mat, R + 0.05, 0.04, [x, yc + 0.045, z], 'y', 32)\n  k.around(12, R + 0.025, [x, yc + 0.07, z], 'y', (p) => k.hex('nut', 0.03, 0.02, p))\n  k.box('handwheel', [R * 1.2, 0.025, 0.03], [x, yc + 0.08, z])\n  k.cyl('stainless', 0.012, 0.08, [x, y - D * 0.8 - R * 0.6 - 0.03, z], 'y', 10)\n  k.hex('nut', 0.03, 0.02, [x, y - D * 0.8 - R * 0.6 - 0.08, z])\n  k.tube('tubing', [[x - R * 0.7, y + D * 0.3, z + R * 0.75], [x - R * 0.7, yc + 0.15, z + R + 0.08], [x + R * 0.7, yc + 0.15, z + R + 0.08], [x + R * 0.7, y + D * 0.3, z + R * 0.75]], 0.005, 6, 0.03)\n  gauge(k, [x, yc + 0.2, z + R + 0.1], 'z', 0.1, 'bar', 2)\n}\n\n/** Spring-loaded back-pressure / thermal relief valve body on a line point, bonnet towards `up`. */\nexport function reliefBody(k: Kit, pos: V3, up: V3, s = 0.02) {\n  k.sphere('valveBody', s * 1.2, pos, undefined, 14)\n  k.cyl('actuatorRed', s * 0.7, s * 3, addv(pos, up, s * 2.4), up, 12, s * 0.5)\n  k.cyl('actuatorRed', s * 0.5, s * 0.8, addv(pos, up, s * 4.2), up, 10)\n}\n\n/**\n * Mating pipe flange bolted to a nozzle face that points along `dir` (nozzle drawn with studs: false): gasket, flange\n * facing back, bore liner and through-studs with two nuts. Returns the weld end of the mating flange.\n */\nexport function mateFlange(k: Kit, face: V3, dir: V3, nps: number, rating: Rating): V3 {\n  const f = flangeDims(nps, rating)\n  const g = 0.0045\n  gasket(k, nps, rating, addv(face, dir, g / 2), dir, g)\n  const mf = addv(face, dir, g)\n  const back: V3 = [-dir[0], -dir[1], -dir[2]]\n  blFlange(k, mf, back, nps, rating, false)\n  const span = 2 * (f.thickness + f.raisedFaceHeight) + g\n  const studL = span + f.boltDia * 3\n  k.boltCircle('boltXylan', 'nut', f.bolts, f.boltCircle / 2, addv(addv(face, dir, g / 2), dir, -studL / 2), dir, f.boltDia, studL, [f.boltDia * 0.95, studL - f.boltDia * 0.95])\n  return addv(mf, dir, f.hubLength + f.raisedFaceHeight)\n}\n\n/** Weld-to-weld length of an in-kit wafer butterfly valve between two weld-neck flanges. */\nexport function butterflySpan(nps: number, rating: Rating) {\n  const f = flangeDims(nps, rating)\n  return faceToFace('butterfly-wafer', nps, rating) + 2 * (0.003 + f.hubLength + f.raisedFaceHeight)\n}\n\n/** Wafer butterfly valve clamped between two pipe flanges, centred at `pos` on a line along `dir`; lever, gear or pneumatic rack-and-pinion actuator towards `up`. */\nexport function butterflyValve(k: Kit, pos: V3, dir: V3, nps: number, rating: Rating, up: V3 = [0, 1, 0], op: 'lever' | 'gear' | 'pneumatic' = 'pneumatic') {\n  const f = flangeDims(nps, rating)\n  const w = faceToFace('butterfly-wafer', nps, rating)\n  const D = pipeOD(nps)\n  const fl = f.hubLength + f.raisedFaceHeight\n  k.with(frame(pos, dir, up), () => {\n    for (const s of [-1, 1]) {\n      const face: V3 = [s * (w / 2 + 0.003), 0, 0]\n      flange(k, nps, rating, face, [-s, 0, 0], false)\n      liner(k, nps, face, [-s, 0, 0], fl)\n      gasket(k, nps, rating, [s * (w / 2 + 0.0015), 0, 0], 'x', 0.003)\n    }\n    const ri = D / 2 - 0.004\n    k.lathe('valveBody', [[ri, -w / 2], [f.raisedFace / 2 + 0.01, -w / 2], [f.raisedFace / 2 + 0.01, w / 2], [ri, w / 2]], [0, 0, 0], 'x', 32)\n    k.lathe('pipeBore', [[ri, w / 2], [ri, -w / 2]], [0, 0, 0], 'x', 24)\n    k.box('stainless', [0.006, 2 * ri, 2 * ri * 0.15], [0, 0, 0]) // disc edge-on (open)\n    const studL = w + 2 * (f.thickness + f.raisedFaceHeight) + f.boltDia * 3.2\n    k.boltCircle('boltXylan', 'nut', f.bolts, f.boltCircle / 2, [-studL / 2, 0, 0], 'x', f.boltDia, studL, [f.boltDia * 0.95, studL - f.boltDia * 0.95])\n    const yN = f.raisedFace / 2 + 0.01\n    k.cyl('valveBody', Math.max(0.018, D * 0.14), 0.09 + D * 0.2, [0, yN + (0.09 + D * 0.2) / 2, 0], 'y', 16)\n    const yT = yN + 0.09 + D * 0.2\n    k.box('valveBody', [0.1 + D * 0.3, 0.012, 0.1 + D * 0.3], [0, yT, 0])\n    if (op === 'pneumatic') {\n      const s = THREE.MathUtils.clamp(D * 2.2, 0.18, 0.6)\n      k.rbox('actuatorYellow', [s * 0.45, s * 0.4, s * 1.2], s * 0.06, [0, yT + s * 0.2 + 0.006, 0])\n      for (const sz of [-1, 1]) k.cyl('actuatorYellow', s * 0.22, s * 0.03, [0, yT + s * 0.2 + 0.006, sz * s * 0.6], 'z', 18)\n      k.rbox('aluminium', [s * 0.3, s * 0.2, s * 0.3], s * 0.03, [0, yT + s * 0.5, 0]) // limit switch box\n      k.cyl('actuatorRed', s * 0.08, s * 0.05, [0, yT + s * 0.62, 0], 'y', 12)\n    } else if (op === 'gear') {\n      const gb = Math.max(0.1, D * 0.6)\n      k.rbox('valveBody', [gb, gb * 0.6, gb * 0.8], gb * 0.08, [0, yT + gb * 0.3, 0])\n      k.handwheel('handwheel', Math.max(0.25, gb * 1.8), [0, yT + gb * 0.3, gb * 0.7], 'z', 5)\n    } else k.box('actuatorRed', [0.04, 0.02, Math.max(0.2, D * 1.6)], [0, yT + 0.02, Math.max(0.1, D * 0.8) - 0.03])\n  })\n  return w + 2 * (0.003 + fl)\n}\n"
    }
  ],
  "categories": [
    "packages"
  ],
  "meta": {
    "export": "InstrumentAirPackage",
    "anchor": "base",
    "standards": [
      "ISO 8573-1",
      "ISO 1217",
      "ASME BPVC VIII-1",
      "ASME B16.5"
    ]
  }
}