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90-D-181-7 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

90-D-181-7: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY SEAT, overall_height: 0.500 INCHES NOMINAL IN, special_features: WITH HIGH LIFT, body_inside_diameter: 2.250 INCHES NOMINAL IN, body_outside_diameter: 2.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-407-0791, 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
90-D-181-7
NSN: 4820-01-407-0791
FSC: 4820 — Valves, Nonpowered
CAGE: 71905 — DERBYSHIRE MACHINE & TOOL CO (USA)
SPECIFICATIONS
materialNICKEL ALLOY SEAT
overall_height0.500 INCHES NOMINAL IN
special_featuresWITH HIGH LIFT
body_inside_diameter2.250 INCHES NOMINAL IN
body_outside_diameter2.750 INCHES NOMINAL IN
NSN4820-01-407-0791
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 90-D-181-7 · 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
•
BODY OUTSIDE DIAMETER: 2.750 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY SEAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.500 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER2.750 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.250 INCHES NOMINAL IN
SPECIAL FEATURESWITH HIGH LIFT
MATERIALNICKEL ALLOY SEAT
SUBSTITUTES & CROSS-REFERENCES 2
90-D-181 PC 7Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
90-D-181Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 90-D-181-7?
90-D-181-7 is a SEAT,VALVE.
What parts can replace 90-D-181-7?
There are 2 known substitutes for 90-D-181-7: 90-D-181 PC 7, 90-D-181. Substitute compatibility should be verified for your specific system.
What is the NSN for 90-D-181-7?
90-D-181-7 is cataloged in the U.S. Government catalog under NSN 4820-01-407-0791. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.