Pneumatic pneumatic - valve what are the general term

Pneumatic pneumatic - valve 1 > what are the general term put device is a kind of pneumatic control valve used in pressure vessel or abnormal condition of emergency to prevent its internal medium pressure exceeds a high pressure device. 2 > action performance and batch test used to determine the action of the pneumatic pneumatic - valve to put device performance and actual discharge capacity test. 3 > with test when the pneumatic control valve of pneumatic device installed on the system is to enforce the protection system, using the system pressure alone or combined with auxiliary open the device or other pressure source to determine some or all of the work characteristics of 24 > constant pressure test bench test to determine the setting of pneumatic pneumatic - valve to put device pressure and closing a sealing and the experiment was carried out on a pressurized system.