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NMP-477 PIECE 1 — SEAT AND SPRING ASS

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

NMP-477 PIECE 1: SEAT AND SPRING ASS.

The SEAT AND SPRING ASS is a the manufacturer industrial component. Key specifications include special_features: END ITEM APPLICATION RELIEF VALVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-258-2762, 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
NMP-477 PIECE 1
NSN: 4820-01-258-2762
FSC: 4820 — Valves, Nonpowered
CAGE: 75954 — KUNKLE INDUSTRIES INC LONERGAN VALVE DIV (USA)
SPECIFICATIONS
special_featuresEND ITEM APPLICATION RELIEF VALVE
NSN4820-01-258-2762
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NMP-477 PIECE 1 · 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
SUBSTITUTES & CROSS-REFERENCES 4
NMP-970 PIECE 18 AND 19Reference document
Same NSN cross-reference
Reference document — Secondary reference
NMP-477Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
NMP-970Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
NMP-477 PIECE 11,13 AND 15Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NMP-477 PIECE 1?
NMP-477 PIECE 1 is a SEAT AND SPRING ASS.
What parts can replace NMP-477 PIECE 1?
There are 4 known substitutes for NMP-477 PIECE 1: NMP-970 PIECE 18 AND 19, NMP-477, NMP-970 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NMP-477 PIECE 1?
NMP-477 PIECE 1 is cataloged in the U.S. Government catalog under NSN 4820-01-258-2762. This indicates validated use in U.S. government and defense supply chains.
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