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144355 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

144355: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL BODY, flange_diameter: 2.819 INCHES MINIMUM AND 2.820 INCHES MAXIMUM IN, hardness_rating: 90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY, style_designator: PLAIN FLANGED, seat_angle_in_deg: 45.000 NOMINAL, under_flange_height: 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-306-6535, 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
144355
NSN: 4820-00-306-6535
NIINs: 003066535, 011316829
FSC: 4820 — Valves, Nonpowered
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialSTEEL BODY
flange_diameter2.819 INCHES MINIMUM AND 2.820 INCHES MAXIMUM IN
hardness_rating90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY
style_designatorPLAIN FLANGED
seat_angle_in_deg45.000 NOMINAL
under_flange_height0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
body_inside_diameter2.276 INCHES MINIMUM AND 2.286 INCHES MAXIMUM IN
body_outside_diameter2.367 INCHES MINIMUM AND 2.371 INCHES MAXIMUM IN
seating_surface_shapeANGULAR
end_item_identificationACFT ENG R2800
flange_seat_to_disk_end_height0.435 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
material_document_and_classificationAMS 5700 ASSN STD SINGLE MATERIAL RESPONSE BODY
NSN4820-00-306-6535
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 144355 · 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: 0.435 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 2.819 INCHES MINIMUM AND 2.820 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 2.367 INCHES MINIMUM AND 2.371 INCHES MAXIMUM IN
•
HARDNESS RATING: 90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5700 ASSN STD SINGLE MATERIAL RESPONSE BODY
•
BODY INSIDE DIAMETER: 2.276 INCHES MINIMUM AND 2.286 INCHES MAXIMUM IN
•
UNDER FLANGE HEIGHT: 0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.435 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
FLANGE DIAMETER2.819 INCHES MINIMUM AND 2.820 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER2.367 INCHES MINIMUM AND 2.371 INCHES MAXIMUM IN
HARDNESS RATING90.0 ROCKWELL B MINIMUM AND 105.0 ROCKWELL B MAXIMUM BODY
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5700 ASSN STD SINGLE MATERIAL RESPONSE BODY
BODY INSIDE DIAMETER2.276 INCHES MINIMUM AND 2.286 INCHES MAXIMUM IN
UNDER FLANGE HEIGHT0.100 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONACFT ENG R2800
MATERIALSTEEL BODY
SUBSTITUTES & CROSS-REFERENCES 1
AS144355Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 144355?
144355 is a SEAT,VALVE.
What parts can replace 144355?
There is 1 known substitute for 144355: AS144355. Substitute compatibility should be verified for your specific system.
What is the NSN for 144355?
144355 is cataloged in the U.S. Government catalog under NSN 4820-00-306-6535. 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.