Control valve

Details Control valve Control valve

1992-08-26

1994-01-25

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137906, G05D 701

Patent

active

052808041

ABSTRACT:
This invention is intended to control the flow rate and pressure in a valve body by operating a throttling valve connected to the opening of the valve body by a remote pipe. The construction of the control valve is as follows: A spool type pressure compensated control valve 3 is installed on the upstream side of a flow passage of the valve body having an inlet 2 and an outlet 5, and a variable orifice 3' is formed on the pressure compensated control valve 3. On the downstream of the pressure compensated control valve 3 is installed a flow control throttling valve 4, which is urged by a spring 7 in the direction of closing the flow passage. The spring chamber 12' of the flow control throttling valve 4 is connected to the outlet 5 through a central passage 12 in the throttling valve 4. A chamber 20 at the other end of the flow control throttling valve 4 is connected to the inlet 2 via a variable throttle 16, and is also open to the outside of the valve body. A pressure setting valve 22 and an external variable throttling valve 23 are connected to this opening.

REFERENCES:
patent: 3017897 (1962-01-01), Seguenot
patent: 3554222 (1971-01-01), Kihara
patent: 3556135 (1971-01-01), Koyama

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