Gas valve for regulating pressure and blocking gas flow in gas line, regulates actuating pressure based on pressure upstream of actuators

摘要

The gas valve has two actuators (3a,3b) each having a closure body (7a,7b) cooperating with a seat (8a,8b). Each actuator includes a second closure body (7a',7b'), one of the two closure bodies of one actuator being loaded the gas flow in the closing direction and the other in the opening direction. The actuating pressure in two first chambers (13a,13b) is regulated based on the pressure upstream of the actuators (3a,3b). Two second chambers (14a,14b) are subjected to press of the gas flow between the two actuators.