Part Number:
2A33687
Release Date:
8/27/2015
Revision: B
7
Product Description:
The SPM
®
EXL Back Pressure Relief Valve provides increased efficiency during service/maintenance;
improved safety mechanism in the event of a blocked discharge port and increased longevity of service by
design.
The following components of the EXL Back Pressure Relief Valve have been re-designed from the Legacy Back
Pressure N2 valve:
Threaded
Body/Flange
Overhaul of both Upper/Lower inner components
Removable Packing Assembly & Nut
These modified components to the EXL will benefit in the following ways:
Eliminates the area of danger in the event the valve’s discharge port is blocked
Aids in a quicker re-kitting in the field
Reduces assembly time
The SPM
®
EXL Back Pressure Relief Valve provides over-pressure protection for reciprocating pumps, treating
lines, pressure vessels, and other equipment operating under high pressure, high flow conditions. Compact
and simple to operate, the valve is direct acting, relying on the system's hydraulic pressure to overcome a
preset nitrogen gas force to relieve. It is externally adjustable from zero pressure to maximum setting.
The SPM
®
valve will reseat once the system pressure reduces. Unlike many “High-Lift” Valves, which require a
substantial drop in pressure before they will reseat, the SPM
®
Relief Valve exhibits little blow down and will
reseat at or near the “cracking pressure.”
Manufactured to Weir Oil & Gas’s stringent Quality Assurance System, all pressure bearing components are
made from high quality material. The forged body features an integral wing union male inlet connection,
suitable for the pressure rating of the component.
The low-pressure outlet is available with an integral wing union connection. Conforming to conditions of design
and performance in API RP520, the SPM
®
EXL Back Pressure Relief Valve is intended for liquid service. It is
not intended for elevated temperatures or as a safety device in case of fire.
Available in 3”, this valve offers pressure ranges from 1,000 – 15,000 psi. The valve is best suited for over
pressure protection in a “slick water” medium.
DO NOT USE FOR H2S SERVICE! Contact your Weir Oil & Gas representative for advice about
sour gas service applications.
