Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1987-11-04
1988-09-06
Schwadron, Martin P.
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137494, 137495, F16T 116
Patent
active
047685425
ABSTRACT:
A piston (36) divides the valve interior into a main chamber (38) and a sensing chamber (40). A fixed valve seat (26) sealingly engages the piston (36) to close communication between the chambers (38, 40). The seat (26) is carried by an axial stem (20) which extends through an opening (42) in the piston (36). The valve inlet (14) extends through a passageway (22) in the stem (20) into the main chamber (38). An outlet (28) is formed in the main chamber (38). A valve element (62) closes the outlet (28). When pressure is higher in the main chamber (38) than in the sensing chamber (40), the piston moves toward the sensing chamber (40) to open communication between the chambers (38, 40). When there is a pressure drop in the main chamber (38), the piston (36) moves toward the main chamber (38) to open communication between the chambers ( 38, 40) and move the valve element (62) into an open position. A flange (46) caried by the piston (36) engages a flange (80) formed on a hat-shaped retainer (72) to which the valve element (62) is attached. The valve (8) preferably has a manual drain lever (88).
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Pp. 5 and 6 of Jun. 1, 1977 parts catalogue of Wagner Electric Corporation, Parsippany, N.J.
Packing insert for "Speedaire".TM. valve, Model 2Z166, distributed by Dayton Electric Mfg. Co., Chicago, Illinois; distributed prior to Oct. 1984, exact date unknown.
GT Development Corporation
Hepperle Stephen M.
Pauly Joan H.
Schwadron Martin P.
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