The Valve,safety Relief, cataloged under National Stock Number 4820-01-278-5429, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Natural Gas Solutions North America Llc Div Industrial Products Group. Government technical data includes 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-278-5429 |
| Primary Part Number | TC-436-201T 225PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Natural Gas Solutions North America Llc Div Industrial Products Group |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | PLAIN,OPTIONAL END(PIPE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.000 INCHES SECOND END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Maximum Operating Temp | 700.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | STEEL BODY |
| Material | STEEL COMP 303 FLOW CONTROL DEVICE |
| Material | STEEL COMP 303 STEM |
| Thread Series Designator | NPT ALL ENDS |
| Opening Pressure Setting | 225.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| TC-436-201T 225PSI PRIMARY | Natural Gas Solutions North America Llc Div Industrial Products Group (USA) |
| 7153-H-00-HN-3/4IN PRIMARY | Natural Gas Solutions North America Llc Div Industrial Products Group (USA) |
| Reference | Meaning |
|---|---|
| 7153-H-00-HN-3/4IN | 5/9 Secondary reference Texsteam Inc Dba Txt or Rcs or Texsteam |
| TC-436-201T 225PSI | 3/9 Design control — primary reference Texsteam Inc Dba Txt or Rcs or Texsteam |
| TC430-440 | D/9 Drawing number reference only Texsteam Inc Dba Txt or Rcs or Texsteam |
NSN 4820-01-278-5429 is a Valve,safety Relief, manufactured by Natural Gas Solutions North America Llc Div Industrial Products Group, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-278-5429 has 2 manufacturer part numbers on file: TC-436-201T 225PSI (Natural Gas Solutions North America Llc Div Industrial Products Group), 7153-H-00-HN-3/4IN (Natural Gas Solutions North America Llc Div Industrial Products Group).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-278-5701. Verify interchangeability with system specifications before substitution.
Key specifications for TC-436-201T 225PSI: Flow Control Device: DISK; Connection Style: PLAIN,OPTIONAL END(PIPE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END. 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.