Cement warehouse roof 273mm tank pressure relief valve when abnormal pressure endanger the silo structure, safety pressure valve is the last line of defense. That is why, when suddenly too large or too high pumping pressure pressurized silo must be dealt with immediately. Efficient and reliable pressure relief valve silo systems is essential equipment. When the pressure within a preset range, the coil spring to the valve cover closed. Three outside spring rods keep the external ring-shaped bonnet tightly closed until pressure generated inside the silo is less than the spring force. When inside the warehouse when the pressure is too high or too low, if the pressure exceeds a preset range, the valve cover on the last push to relieve pressure. Smaller bonnet covering the exterior of the valve cover from the bottom center of the circular opening. Smaller valve cover by a single spring rod fixed to the outside of the valve and covered by a standard pressurized atmosphere inside the silo. When the pump pressure, the compression spring and fall bonnet. Air from the outside into the silo, then ensures rapid pressure balance and center of the bonnet is pushed into the closed position. The entire work process without manual operation. Widely used in storage pot, top hopper, usually with a warehouse roof dust collector used in conjunction. Pressure relief valve is standard silo systems essential equipment, it can release too much pressure in the silo, but also can ease negative pressure. If the air pressure inside the silo and outside air pressure difference reaches an irregular situation. Pressure relief valve will open automatically to ensure the absolute safety of the silo system. After the pressure is back to normal, the valve will automatically recover. Under normal circumstances, resulting in an imbalance in the cabin air pressure (high-pressure or negative pressure) to the charging or discharging the silo will be, when the pressure inside the warehouse and the warehouse outside the difference is within a certain range over the silo can bear range, it will cause damage to the silo equipment, and even more explosive storage and other major accidents. Product Description: Pressure relief valve Body: Carbon steel surface spray (gray) valve plate: carbon steel, black special sealed connection: clamp connections, with a ring waterproof cover: FRP Technical parameters: Model: BPS250A positive pressure range : 280-1000mmH --- 2O ▲ negative pressure range: -20-120mmH --- 2O ▲ Weight: 9.5