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Technical Data Sheet
PartsTable / COMPONENT / 21270-001
21270-001 ✓ 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

The VALVE ASSEMBLY,MANIFOLD is a the manufacturer industrial component. Key specifications include body_material: ALUMINUM ALLOY 6061, overall_width: 5.000 INCHES NOMINAL IN, overall_length: 8.870 INCHES MAXIMUM IN, valve_operation_method: HYDRAULIC AND MANUAL, end_item_identification: SEAWOLF CLASS SSN, part_name_assigned_by_controlling_agency: RESTRICTOR VALVE ASSY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-503-2497, 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
21270-001
NSN: 4820-01-503-2497
FSC: 4820
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
body_materialALUMINUM ALLOY 6061
overall_width5.000 INCHES NOMINAL IN
overall_length8.870 INCHES MAXIMUM IN
valve_quantity2
valve_operation_methodHYDRAULIC AND MANUAL
end_item_identificationSEAWOLF CLASS SSN
part_name_assigned_by_controlling_agencyRESTRICTOR VALVE ASSY
NSN4820-01-503-2497
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21270-001 · 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
•
VALVE QUANTITY: 2
•
BODY MATERIAL: ALUMINUM ALLOY 6061
•
VALVE OPERATION METHOD: HYDRAULIC AND MANUAL
TECHNICAL CHARACTERISTICS (FLIS)
VALVE QUANTITY2
PART NAME ASSIGNED BY CONTROLLING AGENCYRESTRICTOR VALVE ASSY
OVERALL LENGTH8.870 INCHES MAXIMUM IN
BODY MATERIALALUMINUM ALLOY 6061
SPECIAL FEATURESTHIS QUIET VARIABLE RESTRICTOR VALVE ASSEMBLY HAS 2 VALVES: A RESTRICTOR VALVE AND A CHECK VALVE;OPERATING PRESSURE IS 3000 PSIG; FLOW IS 0.1 TO 5 GPM AT 75 PSID MIN AND 3300 PSID MAX WITH FLUID VISCOSITY AT ATMOSPHERIC PRESSURE BETWEEN 73 AND 77 CENTISTOKES; MANUALLY CLOSE ASSEMBLY BY TURNING ADJUST SCREW COUNTERCLOCKWISE; HAS 4 HELICAL COIL INSERTS IN BODY IAW MS124699 (.4375-20UNF-3B) AND 2 HELICAL COIL INSERTS IN END CAP IAW MS124696 (.250-28UNF-3B); ASSEMBLY MAY BE MOUNTED IN ANY POSITION W/O ADVERSELY AFFECTING OPERATION; MEDIA IS HYDRAULIC FLUID; KEY COMPONENT OF THIS VALVE ASSEMBLY IS P/N 21270-801-1 QUIET ELEMENT WHICH PROVIDES FOR EXTREMELY QUIET OPERATION
VALVE OPERATION METHODHYDRAULIC AND MANUAL
OVERALL WIDTH5.000 INCHES NOMINAL IN
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
389.05096Interchangeable
interchangeable cross-reference
interchangeable
SCC 105 391Interchangeable
interchangeable cross-reference
interchangeable
11055Interchangeable
interchangeable cross-reference
interchangeable
21270Interchangeable
interchangeable cross-reference
interchangeable
10440MRInterchangeable
interchangeable cross-reference
interchangeable
5082-2240-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21270-001?
21270-001 is a VALVE ASSEMBLY,MANIFOLD.
What parts can replace 21270-001?
There are 21 known substitutes for 21270-001: 389.05096, SCC 105 391, 11055 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21270-001?
21270-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-503-2497. 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