The Valve,iris, cataloged under National Stock Number 4820-01-463-7495, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunter Environmental Corporation Dba Hunter Protective Systems. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-463-7495 |
| Primary Part Number | L40F0400W |
| Item Name | Valve,iris |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunter Environmental Corporation Dba Hunter Protective Systems |
| Status | ACTIVE |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| General Characteristics Item Description | MAX TORQUE REQD DOES NOT EXCEED 20"-LB AT 20 IN WATER OF STATIC PRESS ON CLOSEDVALVE;PATENTED VALVE: PATENT NUMBER 2321336;VALVE AS A COMPLETE ASSY IS SOLD AS A SPARE PART NUMBER DETAIL PARTS SOLD AS SPARE PART; VALVE TOBE RETURNED TO IDL FOR ANY REPAIRS OR OVERHAUL; VALVE OPERATES SATISFACTORILY IN TEMP RANGE OF -65 DEGREE F TO 600 DEGREE F LIFE IN EXCESS OF 10,000 CYCLES; TOTAL WEIGHT OF VALVE ASSSY 1 LB 3 OZ LBS |
| Special Markings | LETTERS STAMPED INTO HOUSING CASTING TO DENOTE CLOSED POSITION OF VALVE ACTUATOR HANDLE; LETTER "O" STAMPED INTO HAOUSING CASTING TO DENOTE THE OPEN POSITION OF VALVE ACTUATOR HANDLE; PART NUMBER STAMPED INTO METAL FACE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| L40F0400W PRIMARY | Hunter Environmental Corporation Dba Hunter Protective Systems (USA) |
| Reference | Meaning |
|---|---|
| IV-40-450 | D/9 Drawing number reference only Hunter Environmental Corporation Dba Hunter Protective Systems |
NSN 4820-01-463-7495 is a Valve,iris, manufactured by Hunter Environmental Corporation Dba Hunter Protective Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-463-7495 has 1 manufacturer part number on file: L40F0400W (Hunter Environmental Corporation Dba Hunter Protective Systems).
Key specifications for L40F0400W: Overall Diameter: 4.000 INCHES NOMINAL IN; General Characteristics Item Description: MAX TORQUE REQD DOES NOT EXCEED 20"-LB AT 20 IN WATER OF STATIC PRESS ON CLOSEDVALVE;PATENTED VALVE: PATENT NUMBER 2321336;VALVE AS A COMPLETE ASSY IS SOLD AS A SPARE PART NUMBER DETAIL PARTS SOLD AS SPARE PART; VALVE TOBE RETURNED TO IDL FOR ANY REPAIRS OR OVERHAUL; VALVE OPERATES SATISFACTORILY IN TEMP RANGE OF -65 DEGREE F TO 600 DEGREE F LIFE IN EXCESS OF 10,000 CYCLES; TOTAL WEIGHT OF VALVE ASSSY 1 LB 3 OZ LBS; Special Features: NHA VALVE,IRIS; End Item Identification: W/S CODE MAURY CLASS TAGS-39. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.