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1131143G1 — DIAPHRAGM,ACTUATOR VALVE,SPECIAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1131143G1: DIAPHRAGM,ACTUATOR VALVE,SPECIAL.

DIAPHRAGM,ACTUATOR VALVE,SPECIAL. Key specifications include material: RUBBER, overall_height: 0.320 INCHES NOMINAL IN, outside_diameter: 1.182 INCHES NOMINAL IN, material_thickness: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN, taper_major_diameter: 0.870 INCHES NOMINAL IN, taper_minor_diameter: 0.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-237-9781, 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
1131143G1
NSN: 4820-01-237-9781
FSC: 4820 — Valves, Nonpowered
CAGE: 28528 — ITT INDUSTRIES INC ITT AEROSPACE COMMUNICATIONS DIV EAST (USA)
SPECIFICATIONS
materialRUBBER
overall_height0.320 INCHES NOMINAL IN
outside_diameter1.182 INCHES NOMINAL IN
material_thickness0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
taper_major_diameter0.870 INCHES NOMINAL IN
taper_minor_diameter0.750 INCHES NOMINAL IN
NSN4820-01-237-9781
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1131143G1 · 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
•
OUTSIDE DIAMETER: 1.182 INCHES NOMINAL IN
•
TAPER MINOR DIAMETER: 0.750 INCHES NOMINAL IN
•
TAPER MAJOR DIAMETER: 0.870 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.320 INCHES NOMINAL IN
OUTSIDE DIAMETER1.182 INCHES NOMINAL IN
TAPER MINOR DIAMETER0.750 INCHES NOMINAL IN
TAPER MAJOR DIAMETER0.870 INCHES NOMINAL IN
MATERIAL THICKNESS0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
MATERIALRUBBER
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 1131143G1?
1131143G1 is a DIAPHRAGM,ACTUATOR VALVE,SPECIAL.
What is the NSN for 1131143G1?
1131143G1 is cataloged in the U.S. Government catalog under NSN 4820-01-237-9781. 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.