The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-911-9745, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bellofram Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-911-9745 |
| Primary Part Number | SD501 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 6 |
| Flow Control Device | DISK, GUIDED |
| Renewable Seat Ring Type | ANY ACCEPTABLE |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Flange Thickness | 0.250 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| Valve Loading Method | SPRING |
| Mounting Facility | FLANGE |
| First End Connection Type | PLAIN FACE FLANGE |
| First End Flange Shape Style | OCTAGON W/ BOLT HOLES |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | RUBBER SYNTHETIC SEAT |
| Media for Which Designed | WATER |
| Maximum Inlet Pressure Rating | ERR-060 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| SD501 | Bellofram Corporation (USA) |
| Reference | Meaning |
|---|---|
| SD501 | 3/9 Design control — primary reference Desco Corp Marsh Bellofram Div |
NSN 4820-00-911-9745 is a Valve,regulating,fluid Pressure, manufactured by Bellofram Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-911-9745 has 1 manufacturer part number on file: SD501 (Bellofram Corporation).
Key specifications for SD501: First End Bolt Hole Quantity: 6; Flow Control Device: DISK, GUIDED; Renewable Seat Ring Type: ANY ACCEPTABLE; Second End Relationship with First End: IDENTICAL. 18 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.