The walls of a cold room are constantly subjected to strains caused by pressure variations, either from inside or outside.
The patented valves of FERMOD make it possible to balance internal and external pressures through venting.
DESCRIPTION OF THE VALVE:
It is a heating, mechanically operated valve with two airtight mobile flaps, one for admission and the other for exhaust.
It is adjusted to operate over a given pressure of about 10 mm water column. It consists of two elements:
A – THE MECHANICAL ELEMENT outside the room.
It is composed of:
– 1 main case made of reinforced composite,
– 1 cover made of composite,
– 1 anodized dural plate with gasket,
– 2 mobile flaps consisting of plates with an EPDM diaphragm placed to ensure tightness,
– Ref 2230 Wall mounting: 3 stainless steel springs hold each of the two flaps in the closed position,
– 1 composite tube with a gasket goes through the wall and is attached to the case by a tight fixture.
B – THE HEATING ELEMENT is fixed inside the tube with a tightening band.
IT PREVENTS FROSTING and consists of:
– 1 heating element NF, IP55, 40 watt/220 V for valves 2230, 25 watt/220 V for valves 2231 for ceiling mounting, 220 V supply with earth connection,
– 1 Thermal contact will control the heating element’s temperature.
