The reason
Introduction
That's when a sudden excessive pressure inside the silo or too high pumping pressure must be dealt with immediately. Efficient and reliable pressure relief valve silo system is essential equipment. When the pressure value is within a preset range, the coil spring so that the lid remains closed valve state. Three external annular external lever spring holding the valve cover tightly closed until the pressure generated within the silo is less than the spring force. When the pressure is too high or too low the cartridge, once the pressure value exceeds a preset range, the valve cap to relieve pressure on the push-up. Smaller bonnet covering the center of the circular opening of the outer valve cover from below. Smaller valve cover secured by a single spring rod, to the outside of the bonnet and pressurized air within the silo by standard. When the pump pressure, the spring is compressed and the valve cover lowered. Air from outside the silo, then ensures rapid pressure equalization valve cover is pushed into the center and closed position. The entire work process without manual operation. Widely used in hopper tank, the top of the hopper, usually used in conjunction with the cartridge top Dust.
when the pressure within the device working in a certain pressure range, the valve flap inside the medium acting force is smaller than the above loading mechanism above the force applied to the valve, the difference between the valve and the valve configuration sealing force between the seat valve pressed against the valve seat medium, the device can not be discharged. When the pressure exceeds a predetermined operating pressure within the device and reaches the relief valve opening pressure of the medium acts on the inside upper flap trouble force greater than the force applied to the loading means thereon, whereupon the valve flap from the valve seat, the safety valve opens, the device i.e., the medium is discharged through the valve seat.
role
safety valve for protection in the system. When the system pressure exceeds a predetermined value, the valve opening Ting, the system portion of the gas into the atmosphere, so that the system pressure does not exceed the allowable value, thus ensuring no accident occurs due to excessive pressure. Also known as a safety valve relief. Several typical structure is illustrated as a safety valve. FIG piston a relief valve, the valve body is a flat plate. Air pressure acting on the piston A, when the pressure exceeds a safe value determined by the spring force, piston A is top open, i.e., a portion of the compressed air into the atmosphere from the valve port; when the air pressure falls below the safety value, the drive spring down piston, closes the valve port.