Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1983-08-19
1985-02-26
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
251 634, F16K 1706
Patent
active
045012911
ABSTRACT:
Relief valve arrangement comprising a pressure limiting relief valve, the pressure setting thereof can be switched by an auxiliary piston between two or more ranges so that the control pressure, which is obtained by a pilot valve, can be within a region, which can be controlled accurately.
REFERENCES:
patent: 2944564 (1960-07-01), Pettey
patent: 3017897 (1962-01-01), Seguenot
patent: 4019713 (1977-04-01), Kalb
Nilson Robert G.
Vickers Incorporated
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