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0-639E — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

0-639E: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL SEAT, special_features: FOR SAFETY RELIEF VALVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-232-2461, 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
0-639E
NSN: 4820-01-232-2461
FSC: 4820 — Valves, Nonpowered
CAGE: 16497 — DRESSER, INC. DBA DRESSER EQUIPMENT GROUP DIV INDUSTRIAL VALVE OPERATIONS, DRESSE (USA)
SPECIFICATIONS
materialSTEEL SEAT
special_featuresFOR SAFETY RELIEF VALVE
NSN4820-01-232-2461
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 0-639E · 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
•
MATERIAL: STEEL SEAT
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESFOR SAFETY RELIEF VALVE
MATERIALSTEEL SEAT
SUBSTITUTES & CROSS-REFERENCES 2
1900Q-1905QT-18,19Reference document
Same NSN cross-reference
Reference document — Secondary reference
1900QReference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 0-639E?
0-639E is a SEAT,VALVE.
What parts can replace 0-639E?
There are 2 known substitutes for 0-639E: 1900Q-1905QT-18,19, 1900Q. Substitute compatibility should be verified for your specific system.
What is the NSN for 0-639E?
0-639E is cataloged in the U.S. Government catalog under NSN 4820-01-232-2461. 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.