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1. (WO2001031240) LOW NOISE PURGE VALVE

Pub. No.:    WO/2001/031240    International Application No.:    PCT/CA2000/001285
Publication Date: Fri May 04 01:59:59 CEST 2001 International Filing Date: Tue Oct 31 00:59:59 CET 2000
IPC: F16K 31/06
Applicants: SIEMENS CANADA LIMITED
Inventors: BALSDON, David, W.
Title: LOW NOISE PURGE VALVE
Abstract:
A valve assembly and method for regulating a fluid flow and attenuating noise. The valve assembly comprises a body having a passage extending between a first port (25) and a second port (26), a seat (27) defining a portion of the passage, a member (80) movable with respect to the seat, an actuator (42) moving the member from the first configuration to the second configuration, and a damper (84) movable with respect to the actuator and located at a radial gap between the member and the actuator. The member moves generally along an axis between a first configuration prohibiting fluid flow through the seat and a second configuration permitting fluid flow through the seat. The member includes a first portion adapted to sealingly engage the seat in the first configuration, and a second portion extending along the axis between a first section that is distal from the first portion and a second section that is fixed to the first portion. The actuator has an aperture extending along the axis and generally receiving the second portion. The aperture includes a first segment generally guiding movement of the first section, and a second segment generally guiding movement of the second section.