Combination valve

Details Combination valve Combination valve

1994-02-28

1995-02-21

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

60307, 137852, 251 613, 251 82, F16K 1514

Patent

active

053906977

ABSTRACT:
A combination valve has a pneumatically actuated shut-off valve integrated in a valve housing and operative for blocking and releasing a flow between a valve inlet and a valve outlet. The shut-off valve has a valve member which is spring loaded in a valve closing direction. A check valve is integrated in the valve housing, provides blocking of the flow from the valve outlet to the valve inlet and has a closing member formed by a flat spring. A stroke guard limits an opening stroke of the closing member. The valve member of the shut-off valve is arranged at a side of the flat spring which faces the valve outlet and forming the stroke guard of the check valve. A valve plunger is axially guided in the valve housing and centrally extending through the flat spring, and control piston with which the valve member is connected through the valve plunger is loaded with a suction pressure for opening the shut-off valve and ventilated for closing the shut-off valve.

REFERENCES:
patent: 5203872 (1993-04-01), Naffziger
patent: 5301504 (1994-04-01), Bertling

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