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3W34485 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3W34485: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_height: 0.250 INCHES NOMINAL IN, style_designator: PLAIN, body_outside_diameter: 1.375 INCHES NOMINAL IN, seating_surface_shape: FLAT, body_stepped_inside_diameter: 1.130 INCHES NOMINAL THIRD STEP IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-606-1607, 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
3W34485
NSN: 4820-00-606-1607
FSC: 4820 — Valves, Nonpowered
CAGE: 8FGX3 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORP DBA STEAM & AIR SOLUTIONS DIV CURTISS-WRIGHT STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_height0.250 INCHES NOMINAL IN
style_designatorPLAIN
body_outside_diameter1.375 INCHES NOMINAL IN
seating_surface_shapeFLAT
body_stepped_inside_diameter1.130 INCHES NOMINAL THIRD STEP IN
NSN4820-00-606-1607
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3W34485 · 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: 1.375 INCHES NOMINAL IN
•
BODY STEPPED INSIDE DIAMETER: 0.500 INCHES NOMINAL SECOND STEP IN
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: STEEL OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.250 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.375 INCHES NOMINAL IN
BODY STEPPED INSIDE DIAMETER0.500 INCHES NOMINAL SECOND STEP IN
BODY STEPPED INSIDE DIAMETER1.130 INCHES NOMINAL THIRD STEP IN
STYLE DESIGNATORPLAIN
MATERIALSTEEL OVERALL
SEATING SURFACE SHAPEFLAT
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
30181523Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 3W34485?
3W34485 is a SEAT,VALVE.
What parts can replace 3W34485?
There is 1 known substitute for 3W34485: 30181523. Substitute compatibility should be verified for your specific system.
What is the NSN for 3W34485?
3W34485 is cataloged in the U.S. Government catalog under NSN 4820-00-606-1607. 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.