Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1985-03-27
1986-04-15
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
137599, 251206, F16K 1718
Patent
active
045820848
ABSTRACT:
The positive flow control valve of this invention comprise an interchangeable rotary plug valve member having different outside diameters and a plurality of restrictive orifices leading into a common manifold thereon connecting the inlet bore to the outlet port. Said plug include means to adjustably select orifice function and to produce the desired cross-sectional change in the flow path individually for each said orifice. By rotating said plug to have a selected orifice coaxially aligned to the inlet bore a previously adjusted flow rate through the valve is re-established and maintained in position by a mechanical detent. A seal located at the inlet bore of the housing and the orifice of said plug providing leak proof connection therebetween. The outlet port of the housing having a check valve therein and said port is bypassably connected to the inlet port extention bore wherein another check valve maintains the desired direction of the return flow therethrough into the inlet port. An internally connected adjustable safety valve provides the means for setting maximum allowable internal pressure therein and to relieve the excess pressure therefrom through a relief port.
REFERENCES:
patent: 4148460 (1979-04-01), Kinsler
patent: 4195552 (1980-04-01), Neff
patent: 4366947 (1983-01-01), Voege
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