PartsTable
Technical Data Sheet
21320-850-1 ✓ Verified by PartsTable
· GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

SLEEVE AND SLIDE,DIRECTIONAL CON. Key specifications include slide_material: STEEL, sleeve_material: STEEL, special_features: NITRIDING STEEL PER MIL-S-6709, end_item_identification: FOR USE IN A SPECIAL DIRECTIONAL CONTROL VALVE, WEAPONS SYSTEM JG, SEAWOLF CLASS SSN, valve_design_control_activity: 78062, valve_model_number_for_which_designed: 21320 VALVE ASSY, SIZE SPECIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-01-419-2634, 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
21320-850-1
NSN: 4810-01-419-2634
FSC: 4810
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
slide_materialSTEEL
sleeve_materialSTEEL
special_featuresNITRIDING STEEL PER MIL-S-6709
end_item_identificationFOR USE IN A SPECIAL DIRECTIONAL CONTROL VALVE, WEAPONS SYSTEM JG, SEAWOLF CLASS SSN
valve_design_control_activity78062
valve_model_number_for_which_designed21320 VALVE ASSY, SIZE SPECIAL
NSN4810-01-419-2634
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 21320-850-1 · 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
SLEEVE MATERIAL: STEEL
VALVE DESIGN CONTROL ACTIVITY: 78062
VALVE MODEL NUMBER FOR WHICH DESIGNED: 21320 VALVE ASSY, SIZE SPECIAL
SLIDE MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
SLEEVE MATERIALSTEEL
SPECIAL FEATURESNITRIDING STEEL PER MIL-S-6709
VALVE DESIGN CONTROL ACTIVITY78062
END ITEM IDENTIFICATIONFOR USE IN A SPECIAL DIRECTIONAL CONTROL VALVE, WEAPONS SYSTEM JG, SEAWOLF CLASS SSN
VALVE MODEL NUMBER FOR WHICH DESIGNED21320 VALVE ASSY, SIZE SPECIAL
SLIDE MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
21320Interchangeable
interchangeable cross-reference
interchangeable
21620BInterchangeable
interchangeable cross-reference
interchangeable
7576992Interchangeable
interchangeable cross-reference
interchangeable
3167Interchangeable
interchangeable cross-reference
interchangeable
10134-2404Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21320-850-1?
21320-850-1 is a SLEEVE AND SLIDE,DIRECTIONAL CON.
What parts can replace 21320-850-1?
There are 14 known substitutes for 21320-850-1: 21320, 21620B, 7576992 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21320-850-1?
21320-850-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-01-419-2634. This indicates validated use in U.S. government and defense supply chains.
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