External relief valves

  • “Pop-action” = max. protection, min. product loss
  • Automatic reseating of relief valves after discharging
  • ‘Bubble tight’ seal
  • Available in configurations that permit direct attachment of vent piping when required
  • Optional pipeaway adapters

External pressure relief valves are designed to be primary relief valves on LPG/NH3 tanks, ASME containers above and below ground, bulk plant installations and skid tanks, as well as their connecting piping. They provide an added security for people and equipment where overpressure can accumulate and cause disasters.

Body:
Aluminium rod, Brass, Lower ductile iron, Upper cold rolled steel
Liner:
Stainless steel
Spring guide:
Aluminium, Brass, Coated steel, Stainless steel
Spring:
Coated steel, Corrosion resistant steel, Stainless steel
Seat disc:
PTFE
Gas types:
LPG (Propane, Butane)
Connections:
Thread
Type:
NPT
Pressure range:
Max. 27 bar (391 psi)
Series available:
3135, A3149, AA3135, W3132G and many others
Sizes and range:
1/4" to 2½"
Standards:
ASME, CE, PED, UL listed

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application.

Body:
Aluminium rod, Brass, Lower ductile iron, Upper cold rolled steel
Liner:
Stainless steel
Spring guide:
Aluminium, Brass, Coated steel, Stainless steel
Spring:
Coated steel, Corrosion resistant steel, Stainless steel
Seat disc:
PTFE
Gas types:
LPG (Propane, Butane)
Connections:
Thread
Type:
NPT
Pressure range:
Max. 27 bar (391 psi)
Series available:
3135, A3149, AA3135, W3132G and many others
Sizes and range:
1/4" to 2½"
Standards:
ASME, CE, PED, UL listed

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application.

Alternative products

No related products were found.

Did you know?

If used on manifolds, placement of the clapper disc in an intermediate position could restrict flow through one of the relief valves, causing it to destroy the resilient seat disc

Some relief valves incorporate integral pipeaway adapter with break off groove that protects the valve from piping stress damage

Weep hole deflectors are included in some relief valves to guard against flame impingement on adjacent containers

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