The Valve,expansion, cataloged under National Stock Number 4820-00-537-0233, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Electric Co Alco Controls Div. Government technical data includes 25 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-537-0233 |
| Primary Part Number | TJLE1800HW |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Valve Equalizer Location | EXTERNAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | SOCKET |
| Bulb Length | 1.188 INCHES NOMINAL IN |
| Bulb Diameter | 0.375 INCHES NOMINAL IN |
| Valve Equalizer Connection Diameter | 0.250 INCHES NOMINAL IN |
| Mounting Method | WELL BULB |
| Refrigeration Capacity in Btu Per Hour | 17.800 |
| End Connection Quantity | 2 |
| Capillary Tube Length | 60.000 INCHES NOMINAL IN |
| Second End Style Designator | SOCKET |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| Valve Evaporator Temp Range Designation | LOW |
| Bulb Media Type | ANY ACCEPTABLE |
| First End Outside Diameter Tube Accommodated | 1.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT 22 |
| Valve Equalizer Connection Type | FLARED TUBE |
| Valve Pressure Limiting Device | NOT INCLUDED |
| Second End Connection Type | UNTHREADED INTERNAL TUBE |
| Second End Outside Diameter Tube Accommodated | 0.875 INCHES NOMINAL 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 |
|---|---|
| TJL1800HW | Emerson Electric Co Alco Controls Div (USA) |
| TJLE1800HW100 | Emerson Electric Co Alco Controls Div (USA) |
| TJLE1800HW PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
| Reference | Meaning |
|---|---|
| TJL1800HW100-1B | 5/9 Secondary reference Emerson Electric Co Alco Controls Div |
NSN 4820-00-537-0233 is a Valve,expansion, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-537-0233 has 3 manufacturer part numbers on file: TJL1800HW (Emerson Electric Co Alco Controls Div), TJLE1800HW100 (Emerson Electric Co Alco Controls Div), TJLE1800HW (Emerson Electric Co Alco Controls Div).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-844-0975. Verify interchangeability with system specifications before substitution.
Key specifications for TJLE1800HW: Flow Control Device: DIAPHRAGM; Valve Equalizer Location: EXTERNAL; Second End Relationship with First End: NOT IDENTICAL; Body Style: STRAIGHT THRU. 25 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.