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2631890 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

2631890: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, flange_diameter: 0.296 INCHES NOMINAL IN, special_features: 4 KEYWAY SLOTS OPPOSITE SEAT, style_designator: PLAIN FLANGED, surface_treatment: PASSIVATE OVERALL, under_flange_height: 0.189 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4810-00-902-6809, 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
2631890
NSN: 4810-00-902-6809
FSC: 4810 — Valves, Powered
CAGE: 3H889 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_diameter0.296 INCHES NOMINAL IN
special_features4 KEYWAY SLOTS OPPOSITE SEAT
style_designatorPLAIN FLANGED
surface_treatmentPASSIVATE OVERALL
under_flange_height0.189 INCHES NOMINAL IN
body_inside_diameter0.126 INCHES NOMINAL IN
body_outside_diameter0.296 INCHES NOMINAL IN
seating_surface_shapeFLAT
seal_accommodation_typeGROOVED
flange_seat_to_disk_end_height0.030 INCHES NOMINAL IN
NSN4810-00-902-6809
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2631890 · 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: 0.030 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.296 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.296 INCHES NOMINAL IN
•
SEAL ACCOMMODATION TYPE: GROOVED
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.126 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.030 INCHES NOMINAL IN
FLANGE DIAMETER0.296 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.296 INCHES NOMINAL IN
SEAL ACCOMMODATION TYPEGROOVED
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.126 INCHES NOMINAL IN
SPECIAL FEATURES4 KEYWAY SLOTS OPPOSITE SEAT
SURFACE TREATMENTPASSIVATE OVERALL
UNDER FLANGE HEIGHT0.189 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
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

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 2631890?
2631890 is a SEAT,VALVE.
What is the NSN for 2631890?
2631890 is cataloged in the U.S. Government catalog under NSN 4810-00-902-6809. 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.