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Technical Data Sheet
PartsTable / COMPONENT / 21261-001
21261-001 ✓ 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,CHECK is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, style_designator: STRAIGHT THRU, mounting_position: HORIZONTAL OR VERTICAL, operating_pressure: 3300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, disk_loading_method: SPRING, flow_control_device: POPPET. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-417-2304, 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
21261-001
NSN: 4820-01-417-2304
FSC: 4820
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY BODY
style_designatorSTRAIGHT THRU
mounting_positionHORIZONTAL OR VERTICAL
operating_pressure3300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_devicePOPPET
valve_operation_methodAUTOMATIC
end_item_identificationSEAWOLF CLASS SSN
NSN4820-01-417-2304
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21261-001 · 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
•
FLOW CONTROL DEVICE: POPPET
•
VALVE OPERATION METHOD: AUTOMATIC
•
DISK LOADING METHOD: SPRING
•
OPERATING PRESSURE: 3300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
STYLE DESIGNATOR: STRAIGHT THRU
•
MOUNTING POSITION: HORIZONTAL OR VERTICAL
•
MATERIAL: ALUMINUM ALLOY BODY
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
FLOW CONTROL DEVICEPOPPET
VALVE OPERATION METHODAUTOMATIC
DISK LOADING METHODSPRING
OPERATING PRESSURE3300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
STYLE DESIGNATORSTRAIGHT THRU
MOUNTING POSITIONHORIZONTAL OR VERTICAL
MATERIALALUMINUM ALLOY BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
21261Interchangeable
interchangeable cross-reference
interchangeable
8501460Interchangeable
interchangeable cross-reference
interchangeable
MILB857TYPE1STYLEBInterchangeable
interchangeable cross-reference
interchangeable
110633Interchangeable
interchangeable cross-reference
interchangeable
695862Interchangeable
interchangeable cross-reference
interchangeable
37VInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21261-001?
21261-001 is a VALVE,CHECK.
What parts can replace 21261-001?
There are 17 known substitutes for 21261-001: 21261, 8501460, MILB857TYPE1STYLEB and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21261-001?
21261-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-417-2304. 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