After mixing station DN-250A pressure relief valve mixing station DN-250A pressure relief valve is to achieve the maximum pressure allowed by the system, it will automatically turn off the part of the media to vent the pressure back to normal, it is a security device, According to the internal structure can be divided into spring, heavy hammer and lever type. Pressure control valve can provide pressure protection, the pressure reaches the maximum pressure value, the safety valve automatically opens, to ease pressure on cement silo, cement silo roof dust prevent failure. Pressure relief valve is generally closed pressure system will have a maximum working pressure of the system is not inferior to the normal operating pressure exceeds this value, it will install a pressure relief valve, once the system pressure exceeds the internal media has opened the sealed portion of the diaphragm discharge medium , vent off pressure, when pressure is normal, the diaphragm spring force in the seat next time. So the factory warehouse roof ESP requires a pressure control valve must be installed, our multi-channel processes through pressure relief valve test pressure, material quality has reached the factory requirements. To avoid dust explosion warehouse roof, please use the unit to install a pressure relief valve in the use of warehouse roof ESP. In order to avoid the risk of accidents. Pressure relief valve play a security role in the system. When the system pressure exceeds a predetermined value, the safety valve open Ting, the system part of the gas into the atmosphere, so that the system pressure does not exceed the allowable value, in order to ensure that the system pressure is too high due to an accident does not occur. Also known as a safety valve relief. Several typical structure is illustrated as a safety valve. Figure A is a piston valve, the valve is a flat. Air pressure acting on the piston A, when the pressure exceeds a safe value determined by the spring force, piston A is top open, a portion of the compressed air that is discharged into the atmosphere from the valve port; when the air pressure falls below the safety value, the drive spring piston down, closes the valve port. Pressure relief valve when the pressure of work within a certain range of the pressure inside the device, the internal medium acting on the valve on top of the force is less than the force applied to the valve top loading mechanism between the valves and valve seat constitutes the difference between the sealing force, so that the valve seat is pressed against the media, the device can not be discharged. When the pressure inside the device exceeds the pressure of work and reach safety valve opening pressure, the internal role of the media in trouble flap above loading mechanism force is greater than the force exerted on it, and then leave the valve seat and valve open, equipment i.e. within the medium is discharged through the valve seat. Pressure relief valve play a security role in the system. When the system pressure exceeds a predetermined value, the safety valve opens, the system part of the gas / fluid is discharged into the atmosphere / outside the pipeline, so that the system pressure does not exceed the allowable value, in order to ensure that the system pressure is too high and not because of the accident. Control valve, also known as relief, or relief valve, but there are some differences between it and the pressure relief valve. Several typical structure is illustrated as a safety valve. Figure A is a piston valve, the valve is a flat. Air pressure acting on the piston A, when the pressure exceeds a safe value determined by the spring force, piston A is top open, a portion of the compressed air that is discharged into the atmosphere from the valve port; when the air pressure falls below the safety value, the drive spring piston down, closes the valve port. This valve sealing surface is clean. Once the pressure relief valve pressure exceeds a preset range, the valve cover on the last push to relieve pressure. Smaller valve cover covering the outside of the valve cover from the bottom center of the circular opening. Smaller valve cover by a single spring rod fixed to the outside and covered with pressurized air through a standard valve inside the silo. Safety valve will automatically open, to ensure the absolute safety of the silo system. After the pressure is back to normal, the valve will automatically recover. Silo system pressure relief valve means essential. Pressure relief valve is a safety valve, its opening and closing pieces by the external force is normally closed state, when the equipment or pipeline of medium pressure rises automatically turn exceeds a predetermined value, through the medium outside the system discharge prevent the medium pressure pipe or equipment exceeds the specified value. Safety valves are automatic valves, mainly for boilers, pressure vessels and piping, control pressure does not exceed the value of personal safety and equipment operation plays an important protective role. When mixing station cement silo valve when abnormal pressure endanger the silo structure, safety pressure valve is the last line of defense. This is why, when suddenly the pressure is too large or too large pumping pressure inside the silo must be dealt with immediately. Efficient and reliable pressure relief valve silo system is essential equipment. When the pressure value is within the preset range, the coil spring so that the valve cover closed. Three external spring bar so that the external annular bonnet to maintain tight closure until the pressure generated within the silo is less than the spring force. When the pressure is too high or too low in the warehouse, the pressure relief valve when the pressure exceeds a preset range, the valve cover on the last push to relieve pressure. Smaller valve cover covering the outside of the valve cover from the bottom center of the circular opening. Smaller valve cover by a single spring rod fixed to the outside and covered with pressurized air through a standard valve inside the silo. When the pump pressure, the pressure relief valve spring compression and valve cover decreased. Air from the outside into the silo, then ensure the rapid pressure balance valve cover and push the center of the closed position. The entire work process without manual operation. Widely used in storage material cylinder, top hopper, usually with a warehouse roof dust machine used in conjunction. Mixing station cement silo valve technical parameters carbon steel body, body diameter = 273mm maximum air volume 9.000m3 / h maximum preset negative value - 0.002 bar; maximum pressure + 0.05 bar Weight: 9.5 kg lightweight design, reducing the overall size, ease of handling highly resistant to pressure interference