When there is abnormal pressure endanger silo structure, the safety
pressure valve is the last line of defense. This is the reason that
when the silo is pressurized too large or too large pumping
pressure to be dealt immediately. Efficient and reliable pressure
safety valve is a essential equipment of silo system,. When the
pressure is within the preset range, the coil spring makes the
bonnet keep off. Three external spring rod makes the external
annular bonnet to maintain tightly closed until the silo pressure
is less than the spring force. When the silo pressure is too high or too low, once the pressure
exceeds preset range, bonnet will push up to release pressure. The
smaller bonnet covers external bonnet center circular opening from
the bottom. The smaller bonnet is fixed by a single spring rod, and
through the silo internal standard atmospheric pressure compress to
the external bonnet.when pumping pressure, the springs compress and
let bonnet down. Air enters from outside of the silo, to ensure
that a rapid pressure balance and push the bonnet into the closed
position. All the process is without manual operation. It is widely
used in material storage tanks, top of storage hopper, usually used
together with the warehouse roof duster.