Electric pneumatic control valve of heavy closed pressure relief devices are what type

Electric pneumatic control valve of heavy closed pressure relief devices are what types - In action again after closing pressure release of xian. A > - a kind of automatic valve, relief valve it without any external forces and use the medium itself to discharge a nominal amount of fluid, in order to prevent over the rated pressure of TVC. After the pressure back to normal, the valve closed and prevent any media continue to flow out. B > direct load type electric pneumatic regulator is a only by direct mechanical loading device such as a heavy hammer, lever aggravating hammer or spring to overcome force produced by the disc under medium pressure electric pneumatic control valve. C > motivating auxiliary device of electric pneumatic regulator the electric pneumatic regulator with the aid of a power aided device, can open when pressure is lower than the normal setting. D > with additional load electric pneumatic regulator the electric pneumatic regulator in the inlet pressure to always keep before setting pressure has an additional force used to enhance the seal. The additional force ( Supplementary load) Can be provided by the external energy, and the relief valve inlet pressure reach setting pressure should be released in a reliable way. The size of the added load should be set such that assumes that the load is not released, the relief valve can still be in its inlet pressure shall not exceed the national rules and regulations under the premise of setting pressure percentage reaches the rated capacity e > guiding type electric pneumatic regulator is a kind of rely on from a pilot valve to discharge medium to drive or control of electric pneumatic control valve. The pilot valve itself for direct load safety valve. F > vacuum electric pneumatic regulator is a container designed to complement the fluid to prevent excessive vacuum electric pneumatic control valve, after the recovery of the normal and heavy new closed and stop the medium flow.