Part Number: 2A33687
Release Date: 8/27/2015
Revision: B
19
Maintenance Requirements:
The SPM
®
3” EXL Back Pressure Relief Valve is a well-designed, dependable valve that provides long term
reliable performance. Like any device, however, it requires routine inspection and servicing to maintain its
functionality. Due to the harsh field environment where this relief valve will be used, it is imperative that
maintenance of this valve be HIGH Priority to ensure repeatability.
Weir Oil & Gas recommends that the valve be serviced during the following:
Preventative Maintenance (After 20 Fracturing Stages, or 1 Complete Frac Job)
Any time the valve is sequenced in operation as a result of overpressure (other than routine calibration with
clean water prior to pumping operations), it must undergo a teardown and the primary seal surfaces be
inspected. If no over-pressure event occurs, the valve shall be serviced after every 20 stages or 1 frac job,
whichever comes first. This should be done immediately following the completion of the current job.
Not properly servicing the valve once it has discharged frac media (including frac sand) is a dangerous
practice and increases the risk of leakage during the next operation. Disassembly, repairs, and reassembly
should be done in accordance with service manual instructions.
The valve’s design allows for a quick and easy inspection of its internal components. The components
that require inspecting are listed below and are referenced on the bill of materials on page 24. (Illustrated on
pages 25-27)
The components that must be replaced during a re-kitting are highlighted in yellow below.
Valve Gate
Nozzle Assembly
O-Ring Seal (under Nozzle Assembly)
Spring
Gate
Bushing
Spider
Disassembly/Inspection guidelines are on pages 24 through 32.
The following kits can be ordered separately through Weir Oil & Gas Service centers:
P33637 Cartridge
2P39528 Spider
4L28050 Metal Seal Kit (Nozzle Assembly, Valve Gate)
2A37213 Full Kit
Annual Inspection
An annual inspection is required to ensure that all internal components of the valve are working properly
and are to Weir Oil & Gas Engineering’s specifications. It is imperative that a qualified Weir Oil & Gas
Technician follow the assembly/disassembly/inspection instructions illustrated on pages 33 through 36.
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