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Coldroom Pressure Release Valve 2227V

£36.00

Pressure release valve suitable for wall or ceiling. Suitable for panel thicknesses between 75mm and 150mm.

Valve with heating cord for negative temperature cold room down to -30°C.

 

SKU: A32227 Categories: ,

Description

FUNCTION
The walls of a cold room are constantly subjected to strains caused by pressure variations, either from inside or from
outside. Pressure release valves make it possible to balance internal and external pressures, through venting.
INTERNAL PRESSURES
Defrosting of evaporators, loading of goods, extended opening of doors entail WARMING UP of the air, hence
OVERPRESSURE risk of violent opening of the doors or yielding of the walls.
Likewise, COOLING DOWN of the air and consequently of the room, will result in UNDERPRESSURE and possibly collapse
of the walls.
FOR EXAMPLE, a rise or fall of temperature by 1 degree C creates a pressure of about 40 mm water column i.e. 40 kg/m2
for a 100 m2 ceiling, on evenly distributed load of 4 metric tons.
EXTERNAL PRESSURES
Another factor has to be considered : Atmospheric pressure.
Changes in weather (e.g. storms), may cause pressure variations acting on the outside of walls, with the same drawbacks
as internal pressures.

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