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83309-40 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

83309-40: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316, taper_length: 13.188 INCHES NOMINAL IN, overall_height: 1.000 INCHES NOMINAL IN, overall_length: 13.750 INCHES NOMINAL IN, style_designator: SOLID WEDGE, seat_angle_in_deg: 45.000 NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-220-9638, 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
83309-40
NSN: 4820-01-220-9638
NIINs: 012209638, 012212210, 012353643
FSC: 4820 — Valves, Nonpowered
CAGE: 57574 — VELAN VALVE CORP. (USA)
SPECIFICATIONS
materialSTEEL COMP 316
taper_length13.188 INCHES NOMINAL IN
overall_height1.000 INCHES NOMINAL IN
overall_length13.750 INCHES NOMINAL IN
style_designatorSOLID WEDGE
seat_angle_in_deg45.000 NOMINAL
body_inside_diameter4.000 INCHES NOMINAL IN
taper_major_diameter2.033 INCHES NOMINAL IN
taper_minor_diameter1.125 INCHES NOMINAL IN
body_outside_diameter5.062 INCHES NOMINAL IN
seating_surface_shapeANGULAR
stem_actuating_end_typeTHREADED EXTERNALLY
NSN4820-01-220-9638
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 83309-40 · 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
•
BODY OUTSIDE DIAMETER: 5.062 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A216 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 4.000 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
•
SEATING SURFACE SHAPE: ANGULAR
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.000 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER5.062 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A216 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER4.000 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
SUBSTITUTES & CROSS-REFERENCES 1
83309-40 ITEM 5Same 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 83309-40?
83309-40 is a SEAT,VALVE.
What parts can replace 83309-40?
There is 1 known substitute for 83309-40: 83309-40 ITEM 5. Substitute compatibility should be verified for your specific system.
What is the NSN for 83309-40?
83309-40 is cataloged in the U.S. Government catalog under NSN 4820-01-220-9638. 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.