Pressure switch

Explosion-proof pressure switch on a 1/2" weld-neck flange (port process, facing down) through a bar-stock block valve with bleed plug: a bolted diaphragm-sealed sensing element under a cast Ex d enclosure with a threaded round cover, set-point access cap and a gland on the conduit entry.

Installation

Copies instruments/pressure-switch.tsx and the shared lib/ into src/components/deck-twin/. Needs three, @react-three/fiber and @react-three/drei. See installation for the manual route.

Usage

import { Canvas } from '@react-three/fiber'
import { OrbitControls } from '@react-three/drei'
import { Stage } from './components/deck-twin/lib/stage'
import { PressureSwitch } from './components/deck-twin/instruments/pressure-switch'

export default function Scene() {
  return (
    <Canvas shadows camera={{ position: [8, 5, 9], fov: 35 }}>
      <Stage>
        <PressureSwitch />
      </Stage>
      <OrbitControls makeDefault />
    </Canvas>
  )
}

Props

P&ID

Field bubble with PS plus H / HH / L / LL (PSH, PSHH, PSL, PSLL) on a short process connection, usually feeding a trip.

ISA PSHISA PSHHISA PSLISA PSLLISA PSISA 5.1 (field-mounted instrument bubble)

Switches have S as the function letter and no T. A PSV is a relief valve, not a switch: PSV has V for valve. PDSH across a filter is a differential pressure switch.

Pressure switch specification form (ISA-TR20.00.01) fields and the props they set

Flange ratingrating

Housing material / finishhousing

Tag numbertag

Typical suppliers

Ashcroft. The geometry is generic and sized from public standards. It is not vendor CAD.

For agents

Machine-readable entry with props, ranges, defaults and ports:

Or fetch /r/pressure-switch.json, or copy a ready-made instruction:

Add the Deck Twin "Pressure switch" component to this project. Run `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add pressure-switch` (it copies the file and the shared lib into src/components/deck-twin/), then `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz info pressure-switch` for its props, ranges and ports. Render <PressureSwitch /> inside a React Three Fiber <Canvas shadows>, wrapped in <Stage> from src/components/deck-twin/lib/stage. Set props from my data (metres, NPS in inches, ASME class) and leave the rest at defaults. Install three, @react-three/fiber, @react-three/drei and @types/three if they're missing. Full guide: https://decktwin.com/skill/SKILL.md