Fluid flow valve with variable flow rate

Details Fluid flow valve with variable flow rate Fluid flow valve with variable flow rate

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/122 (2006.01) B60C 23/00 (2006.01) F16K 15/20 (2006.01) F16K 17/18 (2006.01) F16K 17/196 (2006.01) G05D 7/01 (2006.01)

Patent

CA 2298377

An improved fluid flow valve (10) for a fluid flow control system. The flow valve (10) includes a flow-regulating assembly (40) having a housing (44) having a piston bore (15) within which is slideably disposed a piston-like member (42). The piston-like member (42) has a primary flow passage (52) and at least one secondary flow passage (54) formed therein. A first portion (42a) of the piston--like member (42) is configured for mating with a seat (46) of the housing (44), and a resilient member (48) biases the piston-like member (42) away from the seat (46). When at least a predetermined fluid pressure differential exists, the first portion (42a) mates with the seat (46) and causes the at least one secondary flow passage (54) to be at least substantially closed such that fluid can substantially flow only through the primary flow passage (52).

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