The Valve,butterfly, cataloged under National Stock Number 4810-00-993-3933, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Barber-Colman Co Environmental Controls Div. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-00-993-3933 |
| Primary Part Number | BYLB50339 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Barber-Colman Co Environmental Controls Div |
| Status | ACTIVE |
| Flange Shape | ROUND FIRST END |
| Flange Face Design | RAISED STRAIGHT FIRST END |
| Voltage in Volts and Current Type | 26.0 DC |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Operating Pressure | 205.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Mounting Facility | THREADED FASTENER |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Valve Operation Method | ELECTRIC MOTOR |
| Current Rating in Amps | 1.000 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| BYLB50339 PRIMARY | Barber-Colman Co Environmental Controls Div (USA) |
| Reference | Meaning |
|---|---|
| 398171-1 | 5/2 Secondary reference U.S. Government activity |
| 398170-1 | 3/2 Design control — primary reference U.S. Government activity |
| 13217E4032 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 4810-00-993-3933 is a Valve,butterfly, manufactured by Barber-Colman Co Environmental Controls Div, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-00-993-3933 has 1 manufacturer part number on file: BYLB50339 (Barber-Colman Co Environmental Controls Div).
Key specifications for BYLB50339: Flange Shape: ROUND FIRST END; Flange Face Design: RAISED STRAIGHT FIRST END; Voltage in Volts and Current Type: 26.0 DC; Connection Type: FLANGE FIRST END. 10 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.