UK Freight only 8.75
W L Hamilton, Pressure Relief Valve, Adjustable 0-13.75 & 0-27.50 Bar, Bronze Bodied, 1/2
  • Click to enlarge

W L Hamilton, Bronze Bodied, Adjustable Pressure-Relief Valves

Popular for use on ring mains for heating oil burners where a line pressure needs to be maintained upstream of Pressure Regulating Valves at the burner entry points. The valves are adjustable from zero up to 13.75 or 27.50 Bar, though we recommend a minimum line pressure requirement of 0.5 Bar or greater, as the valve will oscillate (make noise) at very low pressures when the spring becomes "wobbly", when the spring is under tension the oscillation will not occur.

Specification of the valves we offer differs from the standard product specification on the W.L.Hamilton datasheet attached.

A quality product manufactured in the U.S.A

Model 1/2" 3/4"
Inlet Thread 1/2" NPT Male 3/4" NPT Male (Will fit a 3/4"BSP Parallel Female)
Outlet Thread 1/2" NPT Female 3/4" NPT Female (Will accept a 3/4"BSP Taper Male Fitting)
Max Working Temp 80 Celcius 80 Celcius
Max Pressure 13.5 Bar / 200 PSI 27 Bar / 400 PSI
Pressure Range 0-13.5 Bar / 0-200 PSI 0-27.5 Bar /400 PSI
Wetted components
Body Bronze
Valve Ball 316 Stainless Steel
Valve Stem Brass
Spring 316 Stainless Steel
Seal NBR (External on adjustment shaft, easily replaceable with Viton or Other material)

Download W.L.Hamilton Pressure Relief Valve - Technical Spec PDFDownload W.L.Hamilton Pressure Relief Valve - Technical Spec PDF

Product Options


Product Code VA004
Condition New

This field is required.
This item has been added to your cart...