Description and working
|For some time tighter safety regulations
in industrialized countries have ensured stricter enforcement of rules regarding the
safeguarding of silos and bins against positive and negative pressure. There is no
question that other countries will have to follow this example.
Pressure Relief Valves by WAMŪ are the last safety net when abnormal pressure conditions
endanger the silo structure. This is why sudden excess or suction pressure inside the silo
must be dealt with instantly. Even though ideally a pressure relief valve should never
have to go into action, it must be efficient and reliable if needed.
In the VCP Pressure Relief Valve, helical springs keep the valve lids closed when the
pressure value remains within the preset limits. The three outside spring rods keep the
external ring-shaped lid firmly closed as long as the force generated by the pressure
inside the silo does not overcome the spring force. Once the pressure exceeds the preset
value the lid is pushed up and the pressure can escape. The smaller lid covers the central
circular opening of the external lid from below. It is held in the middle by a single
spring rod and is pressed on to the external lid by the normal air pressure inside the
silo. In the event of suction pressure, the spring is compressed and allows the lid to
drop. The air entering the silo from outside ensures rapid pressure balance and pushes the
central lid back up into the "closed" position.
|The VCP range includes:
- VCP2731B made from carbon steel
- VCP2732B made from 304 stainless steel
Both versions are preset for a maximum negative pressure of - 0.002 bar (0.03 psi) and a
maximum excess pressure of + 0.05 bar (0.72 psi).
Should the customers requirements be different, the valves can be set within a range
of suction pressure from - 0.002 bar (0.03 psi) to - 0.012 bar (0.17 psi) and for excess
pressure ranging from + 0.028 bar (0.4 psi) to + 0.1 bar (1.45 psi).
Weight: 9.5 kg (21 lbs)
|Lightweight design and reduced overall
dimensions make fitting an easier job.