AccessoriesValves and fittings314 Safety Relief Valve

SKU: A314437 CST

6.44 ex. VAT

Safety relief valve with ½“ male iron threads and a blank pressure gauge port set to 3 bar.

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  • Description
  • Specifications
  • Technical Documentation


314 Safety relief valves for heating and hot water systems

Safety relief valves are typically used for controlling pressure on boilers in heating systems, on stored hot water cylinders in domestic hot water systems and in water systems generally. When the calibrated pressure is reached, the valve opens, and, by means of the discharge to atmosphere, prevents the pressure of the system from reaching levels which would be dangerous for the boiler and the components in the system itself.

Our 314 series safety relief valve is set to 3 bar and comes with ½“ male iron threads and a blank pressure gauge port. The pressure gauge port can be used to easily attach our WI-557 pressure gauge if required.

The video below is for the 311 and 312 series which is the same as the 314 but without the pressure gauge port:



Component Material
Body brass EN 12165 CW617N
Cover brass EN 12165 CW617N
Control Spindle brass EN 12164 CW614N
Obturator Seal EPDM
Diaphram EPDM
Spring steel UNI 3823
Control Knob ABS



Nominal Pressure PN 10
Temperature Range 5-110 °C
Max Opening Pressure Pset + 20%·Pset
Min Closing Differenctial Pset – 20%·Pset
Medium water, air
PED Category IV
Calibration 3 Bar

Technical Documentation

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