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911B381 ✓ 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,BUTTERFLY is a the manufacturer industrial component. Key specifications include material: BRONZE BODY, valve_size: 2.500 INCHES2.500 INCHES IN, valve_operation_method: MANUALMANUAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-201-2309, 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
911B381
NSN: 4820-01-201-2309
FSC: 4820
CAGE: 1NB39 — DOVER RESOURCES, INC. DIV NORRISEAL (USA)
SPECIFICATIONS
materialBRONZE BODY
valve_size2.500 INCHES2.500 INCHES IN
valve_operation_methodMANUALMANUAL
NSN4820-01-201-2309
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 911B381 · 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 OPERATION METHOD: MANUALMANUAL
•
VALVE SIZE: 2.500 INCHES2.500 INCHES IN
•
MATERIAL: BRONZE BODY
TECHNICAL CHARACTERISTICS (FLIS)
VALVE OPERATION METHODMANUALMANUAL
VALVE SIZE2.500 INCHES2.500 INCHES IN
MATERIALBRONZE BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
CS7581Interchangeable
interchangeable cross-reference
interchangeable
427212PC11Interchangeable
interchangeable cross-reference
interchangeable
50262Interchangeable
interchangeable cross-reference
interchangeable
911G381Interchangeable
interchangeable cross-reference
interchangeable
911-381Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 911B381?
911B381 is a VALVE,BUTTERFLY.
What parts can replace 911B381?
There are 5 known substitutes for 911B381: CS7581, 427212PC11, 50262 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 911B381?
911B381 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-201-2309. 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