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PartsTable / COMPONENT / 20-00495
20-00495 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, seat_radius: 0.844 INCHES NOMINAL IN, overall_height: 0.250 INCHES NOMINAL IN, style_designator: PLAIN, body_inside_diameter: 0.938 INCHES NOMINAL IN, body_outside_diameter: 1.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-288-9330, 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
20-00495
NSN: 4820-00-288-9330
FSC: 4820
CAGE: 03670 — TYCO FIRE PRODUCTS LP (USA)
SPECIFICATIONS
materialRUBBER OVERALL
seat_radius0.844 INCHES NOMINAL IN
overall_height0.250 INCHES NOMINAL IN
style_designatorPLAIN
body_inside_diameter0.938 INCHES NOMINAL IN
body_outside_diameter1.500 INCHES NOMINAL IN
seating_surface_shapeRADIAL
NSN4820-00-288-9330
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20-00495 · 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
•
SEATING SURFACE SHAPE: RADIAL
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: RUBBER OVERALL
•
SEAT RADIUS: 0.844 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 0.938 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SEATING SURFACE SHAPERADIAL
STYLE DESIGNATORPLAIN
MATERIALRUBBER OVERALL
OVERALL HEIGHT0.250 INCHES NOMINAL IN
SEAT RADIUS0.844 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.500 INCHES NOMINAL IN
BODY INSIDE DIAMETER0.938 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
LS584Interchangeable
interchangeable cross-reference
interchangeable
V495Interchangeable
interchangeable cross-reference
interchangeable
4908512-0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-00495?
20-00495 is a SEAT,VALVE.
What parts can replace 20-00495?
There are 3 known substitutes for 20-00495: LS584, V495, 4908512-0. Substitute compatibility should be verified for your specific system.
Is 20-00495 still available?
20-00495 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026