Pilot-controlled safety valve

摘要

The valve has a spring-loaded non-return valve plunger, and an annular plunger opening a passage to the low-pressure side when the safety valve operates. The annular plunger (8) has an end face (11) towards the non-return valve plunger (5) and contained in the low-pressure chamber (3).$This divides the end face of the non-return valve plunger into annular (12) and circular (13) faces on the low and high-pressure sides, respectively. The other end face (10) of the annular plunger is in the high-pressure chamber (2).$