PartsTable
Technical Data Sheet
21721N ITEM 5 ✓ 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

VALVE,REGULATING,FLUID PRESSURE. Key specifications include filter: NOT INCLUDED, material: STEEL CORROSION RESISTING SEAT, body_style: STRAIGHT THRU, temp_rating: 550.0 FAHRENHEIT MAXIMUM DEGF, regulation_type: AUTOMATIC SINGLE STAGE, flow_control_device: DISK, FLAT, TOP AND BOTTOM GUIDED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-119-1177, 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
21721N ITEM 5
NSN: 4820-01-119-1177
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
filterNOT INCLUDED
materialSTEEL CORROSION RESISTING SEAT
body_styleSTRAIGHT THRU
temp_rating550.0 FAHRENHEIT MAXIMUM DEGF
regulation_typeAUTOMATIC SINGLE STAGE
flow_control_deviceDISK, FLAT, TOP AND BOTTOM GUIDED
valve_loading_methodSPRING
outlet_pressure_range100.0 TO 450.0 CAMERA MOUNT
end_connection_quantity2
media_for_which_designedSTEAM
first_end_connection_typeRAISED FACE FLANGE
first_end_flange_thickness0.375 INCHES NOMINAL IN
NSN4820-01-119-1177
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 21721N ITEM 5 · 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
VALVE LOADING METHOD: SPRING
OUTLET PRESSURE RANGE: 100.0 TO 450.0 CAMERA MOUNT
MATERIAL: STEEL CORROSION RESISTING FLOW CONTROL DEVICE
FIRST END RAISED FACE HEIGHT: 0.062 INCHES NOMINAL IN
BODY STYLE: STRAIGHT THRU
FIRST END BOLT HOLE DIAMETER: 0.625 INCHES NOMINAL IN
FIRST END BOLT CIRCLE DIAMETER: 2.750 INCHES NOMINAL IN
FIRST END FLANGE SHAPE STYLE: ROUND W/ BOLT HOLES
TECHNICAL CHARACTERISTICS (FLIS)
VALVE LOADING METHODSPRING
OUTLET PRESSURE RANGE100.0 TO 450.0 CAMERA MOUNT
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
FIRST END RAISED FACE HEIGHT0.062 INCHES NOMINAL IN
BODY STYLESTRAIGHT THRU
FIRST END BOLT HOLE DIAMETER0.625 INCHES NOMINAL IN
FIRST END BOLT CIRCLE DIAMETER2.750 INCHES NOMINAL IN
FIRST END FLANGE SHAPE STYLEROUND W/ BOLT HOLES
FIRST END FLANGE THICKNESS0.375 INCHES NOMINAL IN
FIRST END BOLT HOLE QUANTITY4
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
LNS5DInterchangeable
interchangeable cross-reference
interchangeable
Y303701011Interchangeable
interchangeable cross-reference
interchangeable
17390N2 1-2IN150PSIInterchangeable
interchangeable cross-reference
interchangeable
17390N/FLNS5D 2Interchangeable
Same NIIN cross-reference
interchangeable
17390N-2172IN-LNS-5D3/4INInterchangeable
Same NIIN cross-reference
interchangeable
17390N AND 2172Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21721N ITEM 5?
21721N ITEM 5 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace 21721N ITEM 5?
There are 8 known substitutes for 21721N ITEM 5: LNS5D, Y303701011, 17390N2 1-2IN150PSI and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21721N ITEM 5?
21721N ITEM 5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-119-1177. This indicates validated use in U.S. government and defense supply chains.
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