Pressure-relief valve with stepped or double piston

Details Pressure-relief valve with stepped or double piston Pressure-relief valve with stepped or double piston

1992-05-28

1993-06-01

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137538, F16K 1704

Patent

active

052151166

ABSTRACT:
A pressure limiting valve having high flow rates, especially for use as a safety valve with mine props and the like, uses a tubular main valve member whose interior communicates with the valve inlet and has lateral bores opening into the valve outlet when the bores are shifted past a sealing ring in the valve housing. A pilot valve body is received in the tubular valve and the valve spring bears upon the tubular valve. The main valve is shifted by differential pressure.

REFERENCES:
patent: 3763882 (1973-10-01), Shoop
patent: 4552172 (1985-11-01), Krieger
patent: 4660595 (1987-04-01), Kuster

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