The Valve,expansion, cataloged under National Stock Number 4820-00-442-3841, 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 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-442-3841 |
| Primary Part Number | TER22HC |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Valve Equalizer Location | EXTERNAL |
| Temp Rating | -50.0 FAHRENHEIT AND 50.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS |
| First End Style Designator | SOCKET |
| Bulb Length | 9.000 INCHES NOMINAL IN |
| Bulb Diameter | 0.625 INCHES NOMINAL IN |
| Valve Equalizer Connection Diameter | 0.250 INCHES NOMINAL IN |
| Mounting Method | CLAMP BULB |
| End Connection Quantity | 2 |
| Capillary Tube Length | 120.000 INCHES NOMINAL IN |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| Valve Evaporator Temp Range Designation | LOW |
| Bulb Media Type | REFRIGERANT 22 |
| First End Outside Diameter Tube Accommodated | 0.625 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | COPPER ALLOY STEM |
| Material | COPPER ALLOY SEAT |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT 22 |
| Valve Equalizer Connection Type | FLARED TUBE |
| Valve Pressure Limiting Device | 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 |
NSN 4820-00-442-3841 is a Valve,expansion, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-442-3841 has 2 manufacturer part numbers on file: L74-75-32 (J C Aviation International Pty Ltd), TER22HC (Emerson Electric Co Alco Controls Div).
Key specifications for TER22HC: Flow Control Device: POPPET; Valve Equalizer Location: EXTERNAL; Temp Rating: -50.0 FAHRENHEIT AND 50.0 FAHRENHEIT DEGF; Second End Relationship with First End: IDENTICAL. 24 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.