Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1995-02-21
1997-03-25
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Direct response valves
137517, F16K 1502
Patent
active
056135181
ABSTRACT:
A device (11) for restricting excess flow through a conduit (34) includes a unitary injection molded tubular body (12) having a bore (13) in which an annular valve seat (21) and a spring support shoulder (19) are formed. A poppet valve member (22) is positioned within the bore (13) and is biased away from the valve seat (21) by a compression spring (26). The inlet section of the tubular body (12) has a plurality of longitudinally extending arms (27) forming longitudinally extending fluid passageways (28) therebetween to provide bypasses around the poppet valve member (22) when the poppet valve member (22) is in its open position. The arms (27) are spaced apart about the outer periphery of the inlet section, and the distal end (27a) of each arm (27) has a radially inwardly projecting element (31) to retain the poppet valve member (22) in the bore (13). However, the arms (27) are flexible such that the distal ends (27a) can be moved radially outwardly sufficiently to permit the insertion of the poppet valve member (22) therebetween into the bore (13) during the fabrication of the device. A bleed passageway (29) can be provided for automatic reset of the device.
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"DRESSER.RTM. Style 488-XSF Excess Flow Device", Form No. XSF-1090, published prior to 1994.
Dresser Industries Inc.
Hepperle Stephen M.
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