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Technical Data Sheet
PartsTable / COMPONENT / 20M-1,1-1/2IN-40PSI
20M-1,1-1/2IN-40PSI ✓ 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 20M-1,1-1/2IN-40PSI 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 4820-01-278-5427, 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
20M-1,1-1/2IN-40PSI
NSN: 4820-01-278-5427
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
Part Number20M-1,1-1/2IN-40PSI
NSN4820-01-278-5427
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20M-1,1-1/2IN-40PSI · 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
•
NOMINAL THICKNESS: 0.437 INCHES ALL ENDS IN
•
DISK LOADING METHOD: SPRING
•
NOMINAL OUTSIDE DIAMETER: 5.000 INCHES ALL ENDS IN
•
FIRST CONNECTION FACE TO CENTERLINE DISTANCE: 2.125 INCHES IN
•
BOLT HOLE NOMINAL DIAMETER: 0.625 INCHES ALL ENDS IN
•
FLOW CONTROL DEVICE: DISK
•
ADJUSTABLE PRESSURE RANGE: +40.0 TO 50.0 POUNDS PER SQUARE INCH LBS
•
BOLT HOLE QUANTITY: 4 ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THICKNESS0.437 INCHES ALL ENDS IN
DISK LOADING METHODSPRING
NOMINAL OUTSIDE DIAMETER5.000 INCHES ALL ENDS IN
FIRST CONNECTION FACE TO CENTERLINE DISTANCE2.125 INCHES IN
BOLT HOLE NOMINAL DIAMETER0.625 INCHES ALL ENDS IN
FLOW CONTROL DEVICEDISK
ADJUSTABLE PRESSURE RANGE+40.0 TO 50.0 POUNDS PER SQUARE INCH LBS
BOLT HOLE QUANTITY4 ALL ENDS
CONNECTION TYPEFLANGE ALL ENDS
VALVE SIZE1.500 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
GGG-P-781Interchangeable
interchangeable cross-reference
interchangeable
8B7556Interchangeable
interchangeable cross-reference
interchangeable
8010Interchangeable
interchangeable cross-reference
interchangeable
20MInterchangeable
interchangeable cross-reference
interchangeable
1N1082Interchangeable
interchangeable cross-reference
interchangeable
RELEASE1811Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20M-1,1-1/2IN-40PSI?
20M-1,1-1/2IN-40PSI is a 20M-1,1-1/2IN-40PSI.
What parts can replace 20M-1,1-1/2IN-40PSI?
There are 8 known substitutes for 20M-1,1-1/2IN-40PSI: GGG-P-781, 8B7556, 8010 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20M-1,1-1/2IN-40PSI?
20M-1,1-1/2IN-40PSI is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-278-5427. 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