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L40R0300N — VALVE,IRIS

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

L40R0300N: VALVE,IRIS.

The VALVE,IRIS is a the manufacturer industrial component. Key specifications include overall_diameter: 3.000 INCHES NOMINAL IN, special_features: NHA VALVE, IRIS, end_item_identification: W/S CODE MAURY CLASS TAGS-39, specification/standard_data: 1FY-6-MILSTD-1388-2A/HD/ GOVERNMENT SPECIFICATION AND 1FY-6-MIL-STD-1561B(SHIPS)/HD/ GOVERNMENT SPECIFICATION A. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-463-7031, 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
L40R0300N
NSN: 4820-01-463-7031
FSC: 4820 — Valves, Nonpowered
CAGE: 1FYM6 — HUNTER ENVIRONMENTAL CORPORATION DBA HUNTER PROTECTIVE SYSTEMS (USA)
SPECIFICATIONS
overall_diameter3.000 INCHES NOMINAL IN
special_featuresNHA VALVE, IRIS
special_markingsOPEN POSITION LETTER "O" STAMPED INTO COVES;CLOSED POSITION LETTER "S" STAMPED INTO COVES; PART NUMBER STAMPED IN METAL FACE; AIR FLOW DIRECTION ARROW STAMPED INTO HOUSING
end_item_identificationW/S CODE MAURY CLASS TAGS-39
specification/standard_data1FY-6-MILSTD-1388-2A/HD/ GOVERNMENT SPECIFICATION AND 1FY-6-MIL-STD-1561B(SHIPS)/HD/ GOVERNMENT SPECIFICATION A
NSN4820-01-463-7031
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: L40R0300N · 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
•
OVERALL DIAMETER: 3.000 INCHES NOMINAL IN
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: 3" DIAMETER IRIS VALVE BEAD FLANGE LEVER OPERATED;VALVE OPERATES SATISFACTORILY IN TEMP. RANGE-65DEGREES F TO 600 DEGREES F; MAX. TORQUE REQ'D DOES NOT EXCEED 15 IN-LB WITH UPSTREAM STATIC PRESS. OF 20 IN OF WATER ON CLOSED VALVE;COMPLETE VALVE ASSEMBLY TO BE RETURNED TO IDL FOR ANY REPAIR OR OVERHAUL; COMPLETE VALVE ASSEMBLY FURNISHED AS A SPARE PART, NO DETAIL PARTS FURNISHED AS SPARES; PATENTED VALVE - PATENT NO. 2321336 IN
•
SPECIFICATION/STANDARD DATA: 1FY-6-MILSTD-1388-2A/HD/ GOVERNMENT SPECIFICATION AND 1FY-6-MIL-STD-1561B(SHIPS)/HD/ GOVERNMENT SPECIFICATION A
•
SPECIAL MARKINGS: OPEN POSITION LETTER "O" STAMPED INTO COVES;CLOSED POSITION LETTER "S" STAMPED INTO COVES; PART NUMBER STAMPED IN METAL FACE; AIR FLOW DIRECTION ARROW STAMPED INTO HOUSING
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER3.000 INCHES NOMINAL IN
GENERAL CHARACTERISTICS ITEM DESCRIPTION3" DIAMETER IRIS VALVE BEAD FLANGE LEVER OPERATED;VALVE OPERATES SATISFACTORILY IN TEMP. RANGE-65DEGREES F TO 600 DEGREES F; MAX. TORQUE REQ'D DOES NOT EXCEED 15 IN-LB WITH UPSTREAM STATIC PRESS. OF 20 IN OF WATER ON CLOSED VALVE;COMPLETE VALVE ASSEMBLY TO BE RETURNED TO IDL FOR ANY REPAIR OR OVERHAUL; COMPLETE VALVE ASSEMBLY FURNISHED AS A SPARE PART, NO DETAIL PARTS FURNISHED AS SPARES; PATENTED VALVE - PATENT NO. 2321336 IN
SPECIFICATION/STANDARD DATA1FY-6-MILSTD-1388-2A/HD/ GOVERNMENT SPECIFICATION AND 1FY-6-MIL-STD-1561B(SHIPS)/HD/ GOVERNMENT SPECIFICATION A
SPECIAL FEATURESNHA VALVE, IRIS
END ITEM IDENTIFICATIONW/S CODE MAURY CLASS TAGS-39
SPECIAL MARKINGSOPEN POSITION LETTER "O" STAMPED INTO COVES;CLOSED POSITION LETTER "S" STAMPED INTO COVES; PART NUMBER STAMPED IN METAL FACE; AIR FLOW DIRECTION ARROW STAMPED INTO HOUSING
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 1
IV-40-500Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is L40R0300N?
L40R0300N is a VALVE,IRIS.
What parts can replace L40R0300N?
There is 1 known substitute for L40R0300N: IV-40-500. Substitute compatibility should be verified for your specific system.
What is the NSN for L40R0300N?
L40R0300N is cataloged in the U.S. Government catalog under NSN 4820-01-463-7031. 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.