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Technical Data Sheet
PartsTable / COMPONENT / 21221-001
21221-001 ✓ 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

VALVE,LINEAR,DIRECTIONAL CONTROL. Key specifications include body_material: ALUMINUM ALLOY, special_features: SZ 3, end_item_identification: SEAWOLF CLASS SSN, operating_pressure_and_type: 3000.0 POUNDS PER SQUARE INCH (PSI) HYDROCARBON FUEL OR OIL MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-416-4578, 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
21221-001
NSN: 4820-01-416-4578
FSC: 4820
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
body_materialALUMINUM ALLOY
spool_quantity1
special_featuresSZ 3
end_item_identificationSEAWOLF CLASS SSN
operating_pressure_and_type3000.0 POUNDS PER SQUARE INCH (PSI) HYDROCARBON FUEL OR OIL MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
NSN4820-01-416-4578
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21221-001 · 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
•
OPERATING PRESSURE AND TYPE: 3000.0 POUNDS PER SQUARE INCH (PSI) HYDROCARBON FUEL OR OIL MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
SPOOL QUANTITY: 1
•
BODY MATERIAL: ALUMINUM ALLOY
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
OPERATING PRESSURE AND TYPE3000.0 POUNDS PER SQUARE INCH (PSI) HYDROCARBON FUEL OR OIL MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
SPOOL QUANTITY1
BODY MATERIALALUMINUM ALLOY
SPECIAL FEATURESSZ 3
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
215Interchangeable
interchangeable cross-reference
interchangeable
21221Interchangeable
interchangeable cross-reference
interchangeable
500906-2Interchangeable
interchangeable cross-reference
interchangeable
402444Interchangeable
interchangeable cross-reference
interchangeable
153Interchangeable
interchangeable cross-reference
interchangeable
CL-2-SWA-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21221-001?
21221-001 is a VALVE,LINEAR,DIRECTIONAL CONTROL.
What parts can replace 21221-001?
There are 15 known substitutes for 21221-001: 215, 21221, 500906-2 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21221-001?
21221-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-416-4578. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026