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Technical Data Sheet
PartsTable / COMPONENT / 481-1/8B1-2
481-1/8B1-2 ✓ 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 481-1/8B1-2 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-744-1239, 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
481-1/8B1-2
NSN: 4820-00-744-1239
FSC: 4820
CAGE: 86768 — TELEDYNE INDUSTRIES INC TELEDYNE FLUID SYSTEMS REPUBLIC BUSINESS UNIT (USA)
SPECIFICATIONS
Part Number481-1/8B1-2
NSN4820-00-744-1239
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 481-1/8B1-2 · 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: AUTOMATIC
•
MEDIA FOR WHICH DESIGNED: AIR FIRST RESPONSE
•
MAXIMUM OPERATING TEMP: 200.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
FLOW CONTROL DEVICE: POPPET
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
NOMINAL THREAD SIZE: 0.125 INCHES FIRST END IN
•
MOUNTING POSITION: HORIZONTAL OR VERTICAL
TECHNICAL CHARACTERISTICS (FLIS)
VALVE OPERATION METHODAUTOMATIC
MEDIA FOR WHICH DESIGNEDAIR FIRST RESPONSE
MAXIMUM OPERATING TEMP200.0 FAHRENHEIT SINGLE RESPONSE DEGF
FLOW CONTROL DEVICEPOPPET
THREAD DIRECTIONRIGHT-HAND FIRST END
THREAD SERIES DESIGNATORNPT FIRST END
NOMINAL THREAD SIZE0.125 INCHES FIRST END IN
MOUNTING POSITIONHORIZONTAL OR VERTICAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,ALLOY 360 FED SPEC SINGLE MATERIAL RESPONSE SEAT
THREAD DIRECTIONRIGHT-HAND SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
481181PC5Interchangeable
interchangeable cross-reference
interchangeable
481181Interchangeable
interchangeable cross-reference
interchangeable
481181S60Interchangeable
interchangeable cross-reference
interchangeable
16054Interchangeable
interchangeable cross-reference
interchangeable
1801576Interchangeable
Same NIIN cross-reference
interchangeable
481-1/8B-2Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 481-1/8B1-2?
481-1/8B1-2 is a 481-1/8B1-2.
What parts can replace 481-1/8B1-2?
There are 7 known substitutes for 481-1/8B1-2: 481181PC5, 481181, 481181S60 and 4 more. Substitute compatibility should be verified for your specific system.
Is 481-1/8B1-2 still available?
481-1/8B1-2 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