Safety Relief Valve
The purpose of safety Relief units is to protect pipeline networks, measuring and regulating installations against too high a pipeline pressure. The cause of rising pipeline pressure may be that the gas pressure regulator lets gas through by not closing completely when there is no demand. The pressure may also increase if the regulator fails completely. Or when there is no demand the pressure in the pipeline increases due to the ambient temperature. A safety Relief then ensures that the overpressure is blown off above a set value. This prevents that the safety shut-off is addressed which would in turn shut down the entire installation.
Safety relief valve type 10L
The model 10L is designed with the specific property that the Relief pressure will rise minimal during the Relief. The Relief curve indicates a pressure drop at the moment of Relief, after which the Relief capacity will slowly increase as the Relief valve comes to a fully open position. The safety Relief unit can be mounted in all directions. The Relief is applicable for industry and distribution. The spring range runs from 25 t/m 500 mbarg.
Safety Relief Valve type 121
The Sensus safety Relief unit type 121 is suitable for large capacities. The safety Relief is available in connection sizes ranging from 3/4 ” up to 4″. The spring range is 12 – 700 mbarg.
Safety Relief Valve type J48K and J48KC
The J48K pressure relief valve guards against excess pressure. The valve is fully automatic in operation and resets when the pressure falls below the pre-set value.
The J48KC creep relief valve is normally fitted on a skid or modular units. It prevents the build-up of pressure on the downstream side during periods of zero demand in the event of main stream valves not locking up. The units are sized so that their maximum capacity is less than 1% of the full fault capacity of the skid or modular unit (British Gas Specification BGC/PS/E26).