The Valve,butterfly, cataloged under National Stock Number 4820-01-340-5125, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Nibco Inc Chemtrol Div. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-340-5125 |
| Primary Part Number | W45BF-E-N0-3 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Nibco Inc Chemtrol Div |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 6.000 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 3.000 INCHES IN |
| Maximum Operating Temp | 200.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 7.500 INCHES ALL ENDS IN |
| Mounting Facility | WAFER |
| Bolt Hole Quantity | 4 ALL ENDS |
| Face to Face Distance | 2.000 INCHES IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | PLASTIC POLYVINYL CHLORIDE (PVC) FLOW CONTROL DEVICE |
| Material | PLASTIC POLYVINYL CHLORIDE (PVC) BODY |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM SEAT |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.750 INCHES ALL ENDS IN |
| 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 |
|---|---|
| W45BF-E-N0-3 | Nibco Inc Chemtrol Div (USA) |
| Reference | Meaning |
|---|---|
| 3500131 | D/9 Drawing number reference only Envirovac Inc Dba Monogram Systems-Rockford Div |
| 3500131-001 | C/1 Advisory reference — outside the item-of-supply concept Evac North America Inc |
| 3500131-001 | 3/9 Design control — primary reference Envirovac Inc Dba Monogram Systems-Rockford Div |
NSN 4820-01-340-5125 is a Valve,butterfly, manufactured by Nibco Inc Chemtrol Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-340-5125 has 1 manufacturer part number on file: W45BF-E-N0-3 (Nibco Inc Chemtrol Div).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-534-1452. Verify interchangeability with system specifications before substitution.
Key specifications for W45BF-E-N0-3: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 6.000 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 19 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.