The Valve,expansion, cataloged under National Stock Number 4820-01-220-6635, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is R S P Industries Inc. Government technical data includes 30 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-220-6635 |
| Primary Part Number | HCE1-4RW35 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | R S P Industries Inc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Valve Equalizer Location | EXTERNAL |
| Second End Seat Angle in Deg | 37.0 |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 300.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 3A A |
| Body Style | ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS |
| First End Seat Angle in Deg | 37.0 |
| First End Thread Class | 3A A |
| First End Style Designator | FLARED |
| Valve Pressure Limiting Device Setting | 5.0 ENERGY EFFICIENT - FEMP - LOW STANDBY POWER - OFFICE EQUIPMENT -INTEGRATED COMPUTERS |
| Bulb Length | 3.500 INCHES NOMINAL IN |
| Bulb Diameter | 0.500 INCHES NOMINAL IN |
| Valve Equalizer Connection Diameter | 0.250 INCHES NOMINAL IN |
| Valve Pressure Limiting Device Range | 0.0 TO 35.0 GUIDE PINS |
| Refrigeration Capacity in Btu Per Hour | 3.0 |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Capillary Tube Length | 60.000 INCHES NOMINAL IN |
| Second End Style Designator | FLARED |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Valve Evaporator Temp Range Designation | LOW |
| Bulb Media Type | ANY ACCEPTABLE |
| First End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT R-502 |
| Valve Equalizer Connection Type | FLARED TUBE |
| Valve Pressure Limiting Device | INCLUDED |
| 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 |
|---|---|
| HCE1-4RW35 PRIMARY | R S P Industries Inc (USA) |
| HCE1-4RW35 | Emerson Electric Co Alco Controls Div (USA) |
NSN 4820-01-220-6635 is a Valve,expansion, manufactured by R S P Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-220-6635 has 2 manufacturer part numbers on file: HCE1-4RW35 (R S P Industries Inc), HCE1-4RW35 (Emerson Electric Co Alco Controls Div).
Key specifications for HCE1-4RW35: Flow Control Device: POPPET; Valve Equalizer Location: EXTERNAL; Second End Seat Angle in Deg: 37.0; First End Thread Direction: RIGHT-HAND. 30 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.