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25J491PC38 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

25J491PC38: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL BODY, seat_radius: 0.188 INCHES NOMINAL IN, flange_diameter: 1.907 INCHES MINIMUM AND 1.917 INCHES MAXIMUM IN, style_designator: PLAIN FLANGED, under_flange_height: 1.270 INCHES NOMINAL IN, body_inside_diameter: 0.969 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4810-00-339-4537, 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
25J491PC38
NSN: 4810-00-339-4537
FSC: 4810 — Valves, Powered
CAGE: 11660 — WESTINGHOUSE ELECTRIC CORP CONTROL BUSINESS UNIT
SPECIFICATIONS
materialSTEEL BODY
seat_radius0.188 INCHES NOMINAL IN
flange_diameter1.907 INCHES MINIMUM AND 1.917 INCHES MAXIMUM IN
style_designatorPLAIN FLANGED
under_flange_height1.270 INCHES NOMINAL IN
body_inside_diameter0.969 INCHES NOMINAL IN
seating_surface_shapeRADIAL
flange_seat_to_disk_end_height0.477 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-853 MIL SPEC SINGLE MATERIAL RESPONSE BODY
NSN4810-00-339-4537
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 25J491PC38 · 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: 0.477 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 1.907 INCHES MINIMUM AND 1.917 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-853 MIL SPEC SINGLE MATERIAL RESPONSE BODY
•
BODY INSIDE DIAMETER: 0.969 INCHES NOMINAL IN
•
SEAT RADIUS: 0.188 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 1.270 INCHES NOMINAL IN
•
MATERIAL: STEEL BODY
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.477 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
FLANGE DIAMETER1.907 INCHES MINIMUM AND 1.917 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-853 MIL SPEC SINGLE MATERIAL RESPONSE BODY
BODY INSIDE DIAMETER0.969 INCHES NOMINAL IN
SEAT RADIUS0.188 INCHES NOMINAL IN
UNDER FLANGE HEIGHT1.270 INCHES NOMINAL IN
MATERIALSTEEL BODY
SEATING SURFACE SHAPERADIAL
OTHER ITEMS IN FSC 4810 — Valves, Powered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4810-00-001-1247 4810-00-001-4499 4810-00-001-4531 4810-00-001-4532 4810-00-001-4554 4810-00-001-4555 4810-00-001-4556 4810-00-001-4611
SUBSTITUTES & CROSS-REFERENCES 6
1387360Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
BB61S61-123ALT8PC210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
25J427PC210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
25J553PC210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
25J492PC12-64Reference document
Same NSN cross-reference
Reference document — Secondary reference
25J641PC210Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 25J491PC38?
25J491PC38 is a SEAT,VALVE.
What parts can replace 25J491PC38?
There are 6 known substitutes for 25J491PC38: 1387360, BB61S61-123ALT8PC210, 25J427PC210 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 25J491PC38?
25J491PC38 is cataloged in the U.S. Government catalog under NSN 4810-00-339-4537. 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.