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21234-851-1 — PISTON,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

21234-851-1: PISTON,VALVE.

The PISTON,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, end_item_identification: SEAWOLF CLASS SSN, valve_design_control_activity: 78062, valve_type_for_which_designed: DIRECTIONAL CONTROL LINEAR, valve_model_number_for_which_designed: 21234. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-422-0298, 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
21234-851-1
NSN: 4820-01-422-0298
FSC: 4820 — Valves, Nonpowered
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL
end_item_identificationSEAWOLF CLASS SSN
valve_design_control_activity78062
valve_type_for_which_designedDIRECTIONAL CONTROL LINEAR
valve_model_number_for_which_designed21234
NSN4820-01-422-0298
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21234-851-1 · 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
KEY FEATURES
•
VALVE TYPE FOR WHICH DESIGNED: DIRECTIONAL CONTROL LINEAR
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: 21234
•
VALVE DESIGN CONTROL ACTIVITY: 78062
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
VALVE TYPE FOR WHICH DESIGNEDDIRECTIONAL CONTROL LINEAR
VALVE MODEL NUMBER FOR WHICH DESIGNED21234
VALVE DESIGN CONTROL ACTIVITY78062
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 2
21234Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
21234-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21234-851-1?
21234-851-1 is a PISTON,VALVE.
What parts can replace 21234-851-1?
There are 2 known substitutes for 21234-851-1: 21234, 21234-12. Substitute compatibility should be verified for your specific system.
What is the NSN for 21234-851-1?
21234-851-1 is cataloged in the U.S. Government catalog under NSN 4820-01-422-0298. 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.