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PartsTable / COMPONENT / 21107-77
21107-77 ✓ 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,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, connection_type: UNTHREADED CARTRIDGE ALL ENDS, style_designator: DROP-IN CARTRIDGE, valve_operation_method: AUTOMATIC, opening_pressure_setting: 700.0 POUNDS PER SQUARE INCH LBS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-370-5963, 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
21107-77
NSN: 4820-01-370-5963
FSC: 4820
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
connection_typeUNTHREADED CARTRIDGE ALL ENDS
style_designatorDROP-IN CARTRIDGE
valve_operation_methodAUTOMATIC
opening_pressure_setting700.0 POUNDS PER SQUARE INCH LBS
NSN4820-01-370-5963
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21107-77 · 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
•
STYLE DESIGNATOR: DROP-IN CARTRIDGE
•
CONNECTION TYPE: UNTHREADED CARTRIDGE ALL ENDS
•
OPENING PRESSURE SETTING: 700.0 POUNDS PER SQUARE INCH LBS
•
MATERIAL: STEEL CORROSION RESISTING BODY
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORDROP-IN CARTRIDGE
CONNECTION TYPEUNTHREADED CARTRIDGE ALL ENDS
OPENING PRESSURE SETTING700.0 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL CORROSION RESISTING BODY
VALVE OPERATION METHODAUTOMATIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
21107Interchangeable
interchangeable cross-reference
interchangeable
103S13Interchangeable
interchangeable cross-reference
interchangeable
08125Interchangeable
interchangeable cross-reference
interchangeable
B1AInterchangeable
interchangeable cross-reference
interchangeable
RP064-69NE51Interchangeable
interchangeable cross-reference
interchangeable
21A00-0011Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21107-77?
21107-77 is a VALVE,SAFETY RELIEF.
What parts can replace 21107-77?
There are 23 known substitutes for 21107-77: 21107, 103S13, 08125 and 20 more. Substitute compatibility should be verified for your specific system.
Is 21107-77 still available?
21107-77 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026