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181130-91 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

181130-91: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-261-9697, 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
181130-91
NSN: 4820-00-261-9697
NIINs: 002619697, 009050883, 016417029
FSC: 4820 — Valves, Nonpowered
CAGE: 99657 — MAROTTA CONTROLS INC (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
NSN4820-00-261-9697
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 181130-91 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.115 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.374 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.374 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
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MATERIAL DOCUMENT AND CLASSIFICATION: AMS 3650 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
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BODY INSIDE DIAMETER: 0.125 INCHES NOMINAL IN
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MATERIAL: PLASTIC OVERALL
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.115 INCHES NOMINAL IN
FLANGE DIAMETER0.374 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.374 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 3650 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER0.125 INCHES NOMINAL IN
MATERIALPLASTIC OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 181130-91?
181130-91 is a SEAT,VALVE.
What is the NSN for 181130-91?
181130-91 is cataloged in the U.S. Government catalog under NSN 4820-00-261-9697. 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.