Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1975-05-27
1976-08-03
Klinksiek, Henry T.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
F16K 3112
Patent
active
039723453
ABSTRACT:
A pilot operated fluid pressure relief valve has a main valve operable by opposed piston areas, both normally exposed to inlet pressure whenever that is below the maximum pressure setting of the valve. A pressure responsive pilot valve is exposed to inlet pressure through a restricted path and when open, exhausts fluid from the piston area which holds the main valve closed. The restricted pathway contains two laminar flow orifices one of which is between the inlet and the valve closing piston area and the other is between the valve closing piston area and the outlet through the pilot valve. This arrangement provides good damping of oscillations, while minimizing any changes in effective opening pressure which are otherwise caused by the use of a single laminar flow orifice for damping purposes.
Klinksiek Henry T.
Sperry Rand Corporation
Van Meter Theodore
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