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Technical Data Sheet
PartsTable / COMPONENT / CV9-S4501-026-20
CV9-S4501-026-20 ✓ 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: COPPER ALLOY SEAT, thread_length: 1.060 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 1.190 INCHES NOMINAL IN, style_designator: PLAIN THREADED, nominal_thread_size: 1.747 INCHES SINGLE THREADED PORTION IN, body_inside_diameter: 1.248 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-251-3123, 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
CV9-S4501-026-20
NSN: 4820-01-251-3123
FSC: 4820
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY SEAT
thread_length1.060 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height1.190 INCHES NOMINAL IN
style_designatorPLAIN THREADED
nominal_thread_size1.747 INCHES SINGLE THREADED PORTION IN
body_inside_diameter1.248 INCHES NOMINAL IN
seating_surface_shapeFLAT
thread_quantity_per_inch18 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
NSN4820-01-251-3123
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: CV9-S4501-026-20 · 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
•
MATERIAL: COPPER ALLOY SEAT
•
THREAD SERIES DESIGNATOR: UNS SINGLE THREADED PORTION
•
STYLE DESIGNATOR: PLAIN THREADED
•
BODY INSIDE DIAMETER: 1.248 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 18 SINGLE THREADED PORTION
•
NOMINAL THREAD SIZE: 1.747 INCHES SINGLE THREADED PORTION IN
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY SEAT
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
STYLE DESIGNATORPLAIN THREADED
BODY INSIDE DIAMETER1.248 INCHES NOMINAL IN
THREAD QUANTITY PER INCH18 SINGLE THREADED PORTION
NOMINAL THREAD SIZE1.747 INCHES SINGLE THREADED PORTION IN
OVERALL HEIGHT1.190 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
THREAD LENGTH1.060 INCHES NOMINAL SINGLE THREADED PORTION IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
19871-18Interchangeable
interchangeable cross-reference
interchangeable
CV9-S4501-026-18Interchangeable
interchangeable cross-reference
interchangeable
19871 PIECE 18Interchangeable
interchangeable cross-reference
interchangeable
CV9-S4501-026-8Interchangeable
interchangeable cross-reference
interchangeable
CV9-S4501-026Interchangeable
interchangeable cross-reference
interchangeable
C-3650Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CV9-S4501-026-20?
CV9-S4501-026-20 is a SEAT,VALVE.
What parts can replace CV9-S4501-026-20?
There are 8 known substitutes for CV9-S4501-026-20: 19871-18, CV9-S4501-026-18, 19871 PIECE 18 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CV9-S4501-026-20?
CV9-S4501-026-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-251-3123. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026