{
  "$type": "site.standard.document",
  "description": "A force-balanced gas control valve assembly having an integral cylindrical actuator housing and tubular valve body. A mounting flange attached to the housing has a central aperture through which the valve body projects. An annular valve seat is provided in the valve body. A pintle shaft within the…",
  "path": "/patents/1097895",
  "publishedAt": "2003-03-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M26/11",
    "DELPHI TECH INC [US]"
  ],
  "textContent": "A force-balanced gas control valve assembly having an integral cylindrical actuator housing and tubular valve body. A mounting flange attached to the housing has a central aperture through which the valve body projects. An annular valve seat is provided in the valve body. A pintle shaft within the valve body has a valve head matable with the valve seat, a force-balancing piston, an interstem separating the valve head from the piston, and an armature extending into a solenoid actuator subassembly disposed within the actuator housing. The pintle is formed of a ferromagnetic material such as a magnetic stainless steel. In a flow chamber within the valve body, pressure is exerted equally on both the piston, in a direction tending to open the valve, and the valve head, in a direction tending to close the valve. Thus the valve is force-balanced, and the solenoid need operate against only the frictional forces within the valve itself. Preferably, the valve assembly includes a low-friction composite guiding sleeve between the armature and the polepieces of the solenoid.",
  "title": "Force-balanced gas control valve"
}