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145-00226 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

145-00226: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, flange_diameter: 0.450 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, seat_angle_in_deg: 45.000 NOMINAL, under_flange_height: 1.350 INCHES NOMINAL IN, body_outside_diameter: 0.374 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-116-7802, 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
145-00226
NSN: 4820-01-116-7802
FSC: 4820 — Valves, Nonpowered
CAGE: 26505 — GROVE VALVE OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
flange_diameter0.450 INCHES NOMINAL IN
style_designatorPLAIN FLANGED
seat_angle_in_deg45.000 NOMINAL
under_flange_height1.350 INCHES NOMINAL IN
body_outside_diameter0.374 INCHES NOMINAL IN
seating_surface_shapeANGULAR
body_stepped_inside_diameter0.184 INCHES NOMINAL SECOND STEP IN
flange_seat_to_disk_end_height0.151 INCHES NOMINAL IN
NSN4820-01-116-7802
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 145-00226 · 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: 0.151 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.450 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.374 INCHES NOMINAL IN
•
BODY STEPPED INSIDE DIAMETER: 0.184 INCHES NOMINAL SECOND STEP IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
UNDER FLANGE HEIGHT: 1.350 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.151 INCHES NOMINAL IN
FLANGE DIAMETER0.450 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.374 INCHES NOMINAL IN
BODY STEPPED INSIDE DIAMETER0.184 INCHES NOMINAL SECOND STEP IN
BODY STEPPED INSIDE DIAMETER0.288 INCHES NOMINAL FIRST STEP IN
STYLE DESIGNATORPLAIN FLANGED
UNDER FLANGE HEIGHT1.350 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
SUBSTITUTES & CROSS-REFERENCES 2
N-903Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
N-903 SH 3 PIECE 25Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 145-00226?
145-00226 is a SEAT,VALVE.
What parts can replace 145-00226?
There are 2 known substitutes for 145-00226: N-903, N-903 SH 3 PIECE 25. Substitute compatibility should be verified for your specific system.
What is the NSN for 145-00226?
145-00226 is cataloged in the U.S. Government catalog under NSN 4820-01-116-7802. 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.