The Valve,safety Relief, cataloged under National Stock Number 4820-00-730-7250, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Thermal Engineering International (usa) Inc.. Government technical data includes 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-730-7250 |
| Primary Part Number | H1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Thermal Engineering International (usa) Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Bolt Circle Nominal Diameter | 7.000 INCHES FIRST END IN |
| Connection Type | FLANGE FIRST END |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.740 INCHES FIRST END IN |
| Valve Size | 3.000 INCHES IN |
| Second Connection Face to Centerline Distance | 7.000 INCHES IN |
| Nominal Outside Diameter | 8.500 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 FIRST END |
| First Connection Face to Centerline Distance | 7.000 INCHES IN |
| Material | STEEL OVERALL |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.290 INCHES FIRST END 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 |
|---|---|
| 30V70 | Astec Industries Inc Div Astec Ind. (USA) |
| H1 PRIMARY | Thermal Engineering International (usa) Inc. (USA) |
| Reference | Meaning |
|---|---|
| 30V70 | 5/9 Secondary reference Barber-Greene Co |
| 30V70 | C/1 Advisory reference — outside the item-of-supply concept Minnpar, Llc Dba Minnpar |
| H1 | 5/9 Secondary reference Thermal Engineering International Usa Inc |
NSN 4820-00-730-7250 is a Valve,safety Relief, manufactured by Thermal Engineering International (usa) Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-730-7250 has 2 manufacturer part numbers on file: 30V70 (Astec Industries Inc Div Astec Ind.), H1 (Thermal Engineering International (usa) Inc.).
Key specifications for H1: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Bolt Circle Nominal Diameter: 7.000 INCHES FIRST END IN. 15 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.