Electrically actuated valve assembly

Details Electrically actuated valve assembly Electrically actuated valve assembly

F - Mech Eng,Light,Heat,Weapons

16

K

137/38

F16K 31/40 (2006.01)

Patent

CA 1216494

ABSTRACT A pilot operated solenoid actuated valve assembly having a differential pressure sensing diaphragm for opening the main valve in response to loss of pressure through a pilot flow valve from a control pressure chamber. The pilot valve-armature is housed in a non-magnetic guide which is sealed about the diaphragm to form the control pressure chamber. Tubular pole segments surround the guide and define a magnetic air gap. An auxiliary pole piece is loosely received in the guide and is spring biased away from the armature. The pole piece enables the armature to be held fully open at a substantially reduced level of voltage from the actuation or service voltage.

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