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Technical Data Sheet
PartsTable / COMPONENT / 903 1-1/2IN
903 1-1/2IN ✓ 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 903 1-1/2IN is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-316-0091, 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
903 1-1/2IN
NSN: 4820-01-316-0091
FSC: 4820
CAGE: 14448 — HAMMOND VALVE CORP (USA)
SPECIFICATIONS
Part Number903 1-1/2IN
NSN4820-01-316-0091
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 903 1-1/2IN · 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
•
MATERIAL: COPPER ALLOY FLOW CONTROL DEVICE
•
MEDIA FOR WHICH DESIGNED: WATER-OIL-GAS SECOND RESPONSE
•
STYLE DESIGNATOR: STRAIGHT THRU
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
NOMINAL THREAD SIZE: 1.500 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY FLOW CONTROL DEVICE
MATERIALCOPPER ALLOY BODY
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SECOND RESPONSE
MEDIA FOR WHICH DESIGNEDSTEAM FIRST RESPONSE
STYLE DESIGNATORSTRAIGHT THRU
THREAD SERIES DESIGNATORNPT ALL ENDS
NOMINAL THREAD SIZE1.500 INCHES ALL ENDS IN
OPERATING PRESSURE125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
OPERATING PRESSURE200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
MAXIMUM OPERATING TEMP353.0 FAHRENHEIT FIRST RESPONSE DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
4285-7Interchangeable
interchangeable cross-reference
interchangeable
NW4285-7Interchangeable
interchangeable cross-reference
interchangeable
820-4445999-3Interchangeable
interchangeable cross-reference
interchangeable
9D77312Interchangeable
interchangeable cross-reference
interchangeable
312MFFInterchangeable
interchangeable cross-reference
interchangeable
FF-B-171Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 903 1-1/2IN?
903 1-1/2IN is a 903 1-1/2IN.
What parts can replace 903 1-1/2IN?
There are 9 known substitutes for 903 1-1/2IN: 4285-7, NW4285-7, 820-4445999-3 and 6 more. Substitute compatibility should be verified for your specific system.
Is 903 1-1/2IN still available?
903 1-1/2IN 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