Segmentation and differences introduction valve

A safety valve is a closed system with the valve opening and closing parts of its external force is normally closed by the state, when the medium pressure closed system has increased beyond the safety valve automatically open when a predetermined value, through to the outside of the system medium pressure to reduce emissions system to prevent damage in the system of high pressure medium system. Safety valves are automatic valves, mainly used in boilers, pressure vessels and air conditioning, solar pipes, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role.
Safety valve terminology:
(1) safety valve. An automatic Safety Valve Burner Valve . It does not use any force, but the use of the medium itself to discharge the grip of a nominal amount of fluid in order to prevent the system pressure exceeds a predetermined safety value; when the pressure is back to normal, the valve closed again and prevent the media continue to flow.
(2) direct loaded Gas Control Valve. A direct effect of the mechanical loads, such as hammer, lever and weight or spring to overcome the force of the valve under medium pressure relief valve produced.
(3) driving force assist device safety valve. The safety valve by means of a power assist device can be turned under pressure to open at lower than normal. Even if the auxiliary device failure, such valve can still meet the standards.