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W135231D — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

W135231D: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include special_features: SPRING TYPE, valve_operation_method: AUTOMATIC, end_item_identification: AIR-COMPRESSOR, media_for_which_designed: AIR SINGLE RESPONSE, opening_pressure_setting: 3550.0 POUNDS PER SQUARE INCH LBS, nominal_pipe_size_accommodated: 0.500 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-337-3879, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
W135231D
NSN: 4820-01-337-3879
FSC: 4820 — Valves, Nonpowered
CAGE: 8FGX3 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORP DBA STEAM & AIR SOLUTIONS DIV CURTISS-WRIGHT STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
special_featuresSPRING TYPE
valve_operation_methodAUTOMATIC
end_item_identificationAIR-COMPRESSOR
media_for_which_designedAIR SINGLE RESPONSE
opening_pressure_setting3550.0 POUNDS PER SQUARE INCH LBS
nominal_pipe_size_accommodated0.500 INCHES ALL ENDS IN
NSN4820-01-337-3879
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: W135231D · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.500 INCHES ALL ENDS IN
•
MEDIA FOR WHICH DESIGNED: AIR SINGLE RESPONSE
•
OPENING PRESSURE SETTING: 3550.0 POUNDS PER SQUARE INCH LBS
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES ALL ENDS IN
SPECIAL FEATURESSPRING TYPE
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
END ITEM IDENTIFICATIONAIR-COMPRESSOR
OPENING PRESSURE SETTING3550.0 POUNDS PER SQUARE INCH LBS
VALVE OPERATION METHODAUTOMATIC
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is W135231D?
W135231D is a VALVE,SAFETY RELIEF.
What is the NSN for W135231D?
W135231D is cataloged in the U.S. Government catalog under NSN 4820-01-337-3879. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.