The Valve,safety Relief, cataloged under National Stock Number 4820-01-414-0327, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sun Hydraulics Corporation. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-414-0327 |
| Primary Part Number | RDFA-LEN-CAL |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sun Hydraulics Corporation |
| Status | ACTIVE |
| Style Designator | ANGLE |
| Disk Loading Method | SPRING |
| Media for Which Designed | LIQUID SINGLE RESPONSE |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| RDFA-LEN-CAL PRIMARY | Sun Hydraulics Corporation (USA) |
| 9730-0073 ITEM 24 | Testek Llc Dba Testek Solutions (USA) |
| Reference | Meaning |
|---|---|
| 9730-0073 ITEM 24 | 5/9 Secondary reference Aai Corporation Div Mississippi Operations |
| 9730-0073 | D/9 Drawing number reference only Aai Corporation Div Mississippi Operations |
NSN 4820-01-414-0327 is a Valve,safety Relief, manufactured by Sun Hydraulics Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-414-0327 has 2 manufacturer part numbers on file: RDFA-LEN-CAL (Sun Hydraulics Corporation), 9730-0073 ITEM 24 (Testek Llc Dba Testek Solutions).
Key specifications for RDFA-LEN-CAL: Style Designator: ANGLE; Disk Loading Method: SPRING; Special Features: USED ON DEAERATION/SUPPLY SUBSYSTEM LIQUID COOLING SERVICE UNIT; Media for Which Designed: LIQUID SINGLE RESPONSE. 4 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.