The Valve,expansion, cataloged under National Stock Number 4820-01-434-3397, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corp Div Sporlan Division. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-434-3397 |
| Primary Part Number | EFS-1/2-Z |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corp Div Sporlan Division |
| Status | ACTIVE |
| Valve Equalizer Location | EXTERNAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | STRAIGHT THRU GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| First End Style Designator | FLARED |
| Bulb Length | 3.000 INCHES NOMINAL IN |
| Bulb Diameter | 0.500 INCHES NOMINAL IN |
| Valve Equalizer Connection Diameter | 0.250 INCHES NOMINAL IN |
| Refrigeration Capacity in Btu Per Hour | 6.0 |
| End Connection Quantity | 2 |
| Capillary Tube Length | 30.000 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT |
| Valve Equalizer Connection Type | FLARED TUBE |
| Second End Connection Type | THREADED EXTERNAL TUBE |
| Second End Outside Diameter Tube Accommodated | 0.500 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 |
|---|---|
| EFS-1/2-Z PRIMARY | Parker-Hannifin Corp Div Sporlan Division (USA) |
| M300243 | Mgr Equipment Corp (USA) |
| Reference | Meaning |
|---|---|
| FS-1/2-Z | 5/1 Secondary reference Parker-Hannifin Corp Div Sporlan Division |
| FS-1/2-Z-1/4X1/2SAEX30.0IN | 5/9 Secondary reference Parker-Hannifin Corp Div Sporlan Division |
NSN 4820-01-434-3397 is a Valve,expansion, manufactured by Parker-Hannifin Corp Div Sporlan Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-434-3397 has 2 manufacturer part numbers on file: EFS-1/2-Z (Parker-Hannifin Corp Div Sporlan Division), M300243 (Mgr Equipment Corp).
Key specifications for EFS-1/2-Z: Valve Equalizer Location: EXTERNAL; Second End Relationship with First End: NOT IDENTICAL; Body Style: STRAIGHT THRU GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS; First End Style Designator: FLARED. 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.