The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-649-5248, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Spirax Sarco Inc Dba Spirax Sarco. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-649-5248 |
| Primary Part Number | KX43(DN25) |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Spirax Sarco Inc Dba Spirax Sarco |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 4 |
| Flow Control Device | BELLOWS |
| Temp Rating | 300.0 CELSIUS DEGC |
| Second End Relationship with First End | IDENTICAL |
| Body Style | HIGH PRESSURE (FLANGED) |
| Second End Bolt Hole Quantity | 4 |
| End Connection Quantity | 2 |
| Second End Flange Shape Style | ROUND W/ BOLT HOLES |
| Opening Pressure Setting | 0.0 LOW VOLATILE ORGANIC COMPOUND - COATINGS - PAPER, FABRIC AND FILM COATINGS |
| Temp Control Device Type | THERMOSTATIC |
| Temp Adjustability | ADJUSTABLE |
| Material | STEEL BODY |
| Material | STEEL SEAT |
| Material | COPPER ALLOY STEM |
| Media for Which Designed | STEAM AND WATER, FRESH |
| 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 |
|---|---|
| KX43(DN25) PRIMARY | Spirax Sarco Inc Dba Spirax Sarco (USA) |
NSN 4820-01-649-5248 is a Valve,relief,pressure and Temper, manufactured by Spirax Sarco Inc Dba Spirax Sarco, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-649-5248 has 1 manufacturer part number on file: KX43(DN25) (Spirax Sarco Inc Dba Spirax Sarco).
Key specifications for KX43(DN25): First End Bolt Hole Quantity: 4; Flow Control Device: BELLOWS; Temp Rating: 300.0 CELSIUS DEGC; Second End Relationship with First End: IDENTICAL. 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.