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Nabic 542L Relief Valve

Nabic Pressure Relief Valves are intended for use where pressure tightness is required on the discharge side of the valve. They are ideal for pump relief, bypass relief, outside installations, and inflammable fluids. The valves are of gunmetal construction with top guided copper alloy parts, chrome vanadium spring and PTFE to metal seating. O-ring seals ensure pressure tightness at cover and cap joints. Available options are: stainless steel springs, high pressure versions and Viton seat design.

Nabic 542L Relief Valve

Sizes: 0.5", 0.75", 1", 1.25", 1.5", 2", 2.5", 3"
Connections: Female BSP Inlet x Female BSP Outlet
Materials: Gunmetal Body, Chrome Vanadium Spring, PTFE to metal Seating
Pressure: 10.5 Barg Max
Temperature: 195 degC Max

Nabic 542L Relief Valve Datasheet

To buy online please visit


If you buy valves on a regular basis please call 01482 601036 to discuss setting up an account with an agreed discount structure

If you do not find what you require please get intouch as we have a much larger range available

  Part Code Body Marking Size & Connections Delivery  
  N-542L-015 DN15 1/2" BSPP Female Inlet x 1/2" BSPP Female Outlet
On Stock  
  N-542L-020 DN20 3/4" BSPP Female Inlet x 3/4" BSPP Female Outlet On Stock  
  N-542L-025 DN25 1" BSPP Female Inlet x 1" BSPP Female Outlet On Stock  
  N-542L-032 DN32 1.1/4" BSPP Female Inlet x 1.1/4" BSPP Female Outlet On Stock  
  N-542L-040 DN40 1.1/2" BSPP Female Inlet x 1.1/2" BSPP Female Outlet On Stock  
  N-542L-050 DN50 2" BSPP Female Inlet x 2" BSPP Female Outlet On Stock  
  N-542L-065 DN65 2.1/2" BSPP Female Inlet x 2.1/2" BSPP Female Outlet On Stock  
  N-542L-080 DN80 3" BSPP Female Inlet x 3" BSPP Female Outlet On Stock  

Note: This service is unique to us.

If you pay for this service and then send in your valve we will check its condition and then test and recertify the valve. If it requires a spares kit fitting then we will contact you first. Should the valve be beyond economical repair then if you buy a new valve this cost will be deducted from the new valve cost. Note: We aim to complete this service within 24 hours of receiving the valve from you.

  Spares Kit - Contains a new diaphragm and 'O' rings.