The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4810-01-327-1147, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-327-1147 |
| Primary Part Number | 3172537-6 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| FSC Application Data | B1-B ACFT SECONDARY POWER SYSTEM |
| Supplementary Features | HARDNESS CRITICAL ITEM |
| Criticality Code Justification | SUPP |
| Media for Which Designed | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
NSN 4810-01-327-1147 is a Valve,regulating,fluid Pressure, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-327-1147 has 2 manufacturer part numbers on file: 3172537-6 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)), 99D0288-6 (Servotronics Inc).
1 possible match (shared part number, not a government interchangeability claim): 2990-01-600-3378. Verify interchangeability with system specifications before substitution.
Key specifications for 3172537-6: FSC Application Data: B1-B ACFT SECONDARY POWER SYSTEM; Supplementary Features: HARDNESS CRITICAL ITEM; Criticality Code Justification: SUPP; Special Features: THIS VALVE PROVIDES A CONTROLLINGPNEUMATIC SIGNAL TO THE VALVE,LOAD CONTROL USED ON THE GTCP165-9 APU FOR THEB1-B. AN EXTERNAL ELECTRICAL SIGNAL ACTUATES A TORQUE MOTOR WITHIN THE VALVE WHICH PROVIDES GRADIENT ACTUATION OF A FLAPPER ALLOWING VARIABLE PNEU MATIC PRESSURE.PART OF THE FEEDBACK LOOP,THIS PNEUMATIC SIGNAL FEEDS INTOTHE PRIMARY PNEUMATIC ACTUATOR AFFECT ING THE AMOUNT OF OPENING FOR THE BUTTERFLY. 4 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.
NSN 4810-01-327-1147 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.