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Technical Data Sheet
PartsTable / COMPONENT / L641/39
L641/39 ✓ 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 L641/39 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-303-6431, 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
L641/39
NSN: 4820-01-303-6431
FSC: 4820
CAGE: N0379 — ULSTEIN BERGEN A/S (NOR)
SPECIFICATIONS
Part NumberL641/39
NSN4820-01-303-6431
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: L641/39 · 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
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESBRASS; PUSH BUTTON CONTROL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
23208Interchangeable
interchangeable cross-reference
interchangeable
10-27522Interchangeable
interchangeable cross-reference
interchangeable
71931Interchangeable
interchangeable cross-reference
interchangeable
A228858Interchangeable
interchangeable cross-reference
interchangeable
B912Interchangeable
interchangeable cross-reference
interchangeable
148404Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is L641/39?
L641/39 is a L641/39.
What parts can replace L641/39?
There are 14 known substitutes for L641/39: 23208, 10-27522, 71931 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for L641/39?
L641/39 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-303-6431. 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