The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-181-8911, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-181-8911 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Valve Stem Design | SINGLE SEAT |
| Renewable Seat Ring Type | THREADED |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC DOUBLE STAGE |
| First End Style Designator | SOCKET W/BRAZING RING |
| Special Test Features | HIGH-IMPACT SHOCK TESTS ARE REQUIRED AS DIRECTED IN PARAGRAPHS 3.6 AND 4.4.2.3 OF MIL-V-2042 IN PAC TEST ABOVE IN |
| Temp Rating | 165.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 25.0 TO 60.0 CAMERA MOUNT |
| Valve Loading Method | SPRING |
| Nondefinitive Spec/std Data | 2 TYPE |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 1.000 INCHES NOMINAL IN |
| Test Data Document | 81349-MILV2042 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | NICKEL ALLOY STEM |
| Material | RUBBER FLOW CONTROL DEVICE |
| Material | RUBBER SEAT |
| Media for Which Designed | WATER, FRESH AND WATER, SALT |
| Maximum Inlet Pressure Rating | ERR-060 |
| Furnished Items | UNION NUT AND TAILPIECE |
| Filter | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| E420ALT6 | 5/9 Secondary reference Kieley and Mueller Inc Sub of Johnson Controls Inc |
| 40399-906 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| 40399-01 1IN 25 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| 30806262REVF | 5/9 Secondary reference Warren Controls, Inc. |
| 4820PL1341074 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MILV2042 | 5/9 Secondary reference U.S. Government activity |
| ASTM F1370 2EU1B | 3/2 Design control — primary reference U.S. Government activity |
| N551 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| 30806262 | D/9 Drawing number reference only Warren Controls, Inc. |
NSN 4820-00-181-8911 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
6 possible matches (shared part number, not a government interchangeability claim): 5310-00-429-7505, 4820-01-133-3781, 4820-01-165-5892. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-00-181-8911: Flow Control Device: DIAPHRAGM; Valve Stem Design: SINGLE SEAT; Renewable Seat Ring Type: THREADED; Second End Relationship with First End: IDENTICAL. 23 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.