The Valve,expansion, cataloged under National Stock Number 4820-01-437-1012, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-437-1012 |
| Primary Part Number | 9A001-01-C FIND NO. 21 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil |
| Status | ACTIVE |
| Flow Control Device | CONE, BOTTOM GUIDED |
| Valve Equalizer Location | INTERNAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Refrigeration Capacity in Btu Per Hour | 6.0 |
| End Connection Quantity | 2 |
| Second End Style Designator | PLAIN |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| Valve Evaporator Temp Range Designation | LOW |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY AND STEEL CORROSION RESISTING SEAT |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT 22 |
| Valve Pressure Limiting Device | NOT INCLUDED |
| Second End Connection Type | UNTHREADED INTERNAL TUBE |
| Second End Outside Diameter Tube Accommodated | 0.625 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 |
|---|---|
| 9A001-01-C FIND NO. 21 PRIMARY | Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil (USA) |
| SV-1/2-L4 PRIMARY | Parker-Hannifin Corp Div Sporlan Division (USA) |
NSN 4820-01-437-1012 is a Valve,expansion, manufactured by Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-437-1012 has 2 manufacturer part numbers on file: 9A001-01-C FIND NO. 21 (Engineered Coil Company Dba Engineered Coil Co Div Drs Marlo Coil), SV-1/2-L4 (Parker-Hannifin Corp Div Sporlan Division).
Key specifications for 9A001-01-C FIND NO. 21: Flow Control Device: CONE, BOTTOM GUIDED; Valve Equalizer Location: INTERNAL; Second End Relationship with First End: NOT IDENTICAL; Body Style: STRAIGHT THRU. 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.