PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 21509N
21509N ✓ 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

ROD,PISTON,LINEAR ACTUATING CYLI. Key specifications include body_width: 3.900 INCHES NOMINAL IN, body_height: 2.500 INCHES NOMINAL IN, body_length: 4.320 INCHES NOMINAL IN, inclosure_type: HERMETICALLY SEALED, mounting_method: THREADED HOLE(S) SINGLE GROUP, frequency_rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-233-4837, 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
21509N
NSN: 4820-01-233-4837
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
body_width3.900 INCHES NOMINAL IN
body_height2.500 INCHES NOMINAL IN
body_length4.320 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
special_features1 PRIMARY WINDING; 5 SECONDARY WINDINGS
nominal_thread_size0.164 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
winding_shielding_methodINTERNAL SHIELD GROUNDED TO INCLOSURE SINGLE COMPONENT
winding_operating_current450.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
NSN4820-01-233-4837
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21509N · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
30254Interchangeable
interchangeable cross-reference
interchangeable
N23949Interchangeable
interchangeable cross-reference
interchangeable
23949Interchangeable
interchangeable cross-reference
interchangeable
DWG/21509N PC 11Interchangeable
interchangeable cross-reference
interchangeable
21509N-GROUP2/135 ACT.W/H.O.D.Interchangeable
interchangeable cross-reference
interchangeable
Y008353913Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 21509N?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 21509N?
21509N is a ROD,PISTON,LINEAR ACTUATING CYLI.
What parts can replace 21509N?
There are 23 known substitutes for 21509N: 30254, N23949, 23949 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21509N?
21509N is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-233-4837. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 21509N

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026