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31520N — VALVE,DIAPHRAGM,STOP

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

31520N: VALVE,DIAPHRAGM,STOP.

The VALVE,DIAPHRAGM,STOP is a the manufacturer industrial component. Key specifications include material: STEEL BODY, valve_size: 1.500 INCHES IN, bonnet_type: OUTSIDE SCREW-YOKE, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-189-2113, 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
31520N
NSN: 4820-01-189-2113
FSC: 4820 — Valves, Nonpowered
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialSTEEL BODY
valve_size1.500 INCHES IN
bonnet_typeOUTSIDE SCREW-YOKE
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
nominal_thickness1.250 INCHES ALL ENDS IN
bolt_hole_quantity4 ALL ENDS
flange_face_designRAISED STRAIGHT ALL ENDS
face_to_face_distance14.500 INCHES IN
valve_operation_methodMANUAL
bonnet_attachment_methodBOLTED
NSN4820-01-189-2113
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 31520N · 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
•
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
•
FLANGE FACE DESIGN: RAISED STRAIGHT ALL ENDS
•
BOLT CIRCLE NOMINAL DIAMETER: 4.875 INCHES ALL ENDS IN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS
•
BOLT HOLE NOMINAL DIAMETER: 1.125 INCHES ALL ENDS IN
•
VALVE SIZE: 1.500 INCHES IN
•
BONNET TYPE: OUTSIDE SCREW-YOKE
TECHNICAL CHARACTERISTICS
FLANGE SHAPEROUND WITH HOLES ALL ENDS
FLANGE FACE DESIGNRAISED STRAIGHT ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER4.875 INCHES ALL ENDS IN
CONNECTION TYPEFLANGE ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
BOLT HOLE NOMINAL DIAMETER1.125 INCHES ALL ENDS IN
VALVE SIZE1.500 INCHES IN
BONNET TYPEOUTSIDE SCREW-YOKE
NOMINAL OUTSIDE DIAMETER7.000 INCHES ALL ENDS IN
BOLT HOLE QUANTITY4 ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 2
15748N1 1-2IN DReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
15748NReference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 31520N?
31520N is a VALVE,DIAPHRAGM,STOP.
What parts can replace 31520N?
There are 2 known substitutes for 31520N: 15748N1 1-2IN D, 15748N. Substitute compatibility should be verified for your specific system.
What is the NSN for 31520N?
31520N is cataloged in the U.S. Government catalog under NSN 4820-01-189-2113. 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.