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PartsTable / COMPONENT / 1640-2-1/2IN
1640-2-1/2IN ✓ 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 1640-2-1/2IN 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 4820-00-288-7209, 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
1640-2-1/2IN
NSN: 4820-00-288-7209
FSC: 4820
CAGE: 37239 — LUNKENHEIMER CO (USA)
SPECIFICATIONS
Part Number1640-2-1/2IN
NSN4820-00-288-7209
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1640-2-1/2IN · 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 SEAT
•
STEM TYPE: RISING
•
MATERIAL DOCUMENT AND CLASSIFICATION: A126-661T,CL A ASSN STD SINGLE MATERIAL RESPONSE BODY
•
NOMINAL THREAD SIZE: 2.500 INCHES IN
•
THREAD SERIES DESIGNATOR: NPT
•
OPERATING PRESSURE AND TYPE: 150.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 225.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY SEAT
MATERIALIRON CAST UNS F11501 BODY
SPECIAL FEATURESR.H. THD
STEM TYPERISING
MATERIAL DOCUMENT AND CLASSIFICATIONA126-661T,CL A ASSN STD SINGLE MATERIAL RESPONSE BODY
NOMINAL THREAD SIZE2.500 INCHES IN
THREAD SERIES DESIGNATORNPT
OPERATING PRESSURE AND TYPE150.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED AND 225.0 POUNDS PER SQUARE INCH (PSI) WATER AND OTHER LIQUIDS MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
FEATURES PROVIDEDBONNET PACKING
BONNET TYPEINSIDE SCREW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
30516-1Interchangeable
interchangeable cross-reference
interchangeable
HL27109Interchangeable
interchangeable cross-reference
interchangeable
RC1Interchangeable
interchangeable cross-reference
interchangeable
1640-1 1/4 INInterchangeable
interchangeable cross-reference
interchangeable
N0. 490 VALVE N.P.S. 1-1/4 IN.Interchangeable
interchangeable cross-reference
interchangeable
1640Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1640-2-1/2IN?
1640-2-1/2IN is a 1640-2-1/2IN.
What parts can replace 1640-2-1/2IN?
There are 19 known substitutes for 1640-2-1/2IN: 30516-1, HL27109, RC1 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1640-2-1/2IN?
1640-2-1/2IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-288-7209. 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