The Valve,safety Relief, cataloged under National Stock Number 4820-01-539-3979, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-539-3979 |
| Primary Part Number | 85DC22M-140-40PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris |
| Status | ACTIVE |
| Bolt Circle Nominal Diameter | 2.750 INCHES ALL ENDS IN |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Bonnet Type | INSIDE SPRING |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Raised Face Nominal Diameter | 1.687 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 3.875 INCHES ALL ENDS IN |
| Material | STEEL COMP 316 STEM |
| Connection Type | FLANGE ALL ENDS |
| Furnished Items and Quantity | 1 LEVER |
| Valve Size | 0.750 INCHES IN |
| Second Connection Face to Centerline Distance | 3.000 INCHES IN |
| Adjustable Pressure Range | +36.0 TO 42.0 POUNDS PER SQUARE INCH LBS |
| Nominal Thickness | 0.500 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Flow Control Device | DISK |
| First Connection Face to Centerline Distance | 3.000 INCHES IN |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | BOLTED |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Media for Which Designed | OIL SINGLE RESPONSE |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 85DC22M-140-40PSI PRIMARY | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 30216 | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 30216 AY 85DC22M-140-40PSI | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
NSN 4820-01-539-3979 is a Valve,safety Relief, manufactured by Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-539-3979 has 3 cross-referenced part numbers: 85DC22M-140-40PSI (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris), 30216 (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris), 30216 AY 85DC22M-140-40PSI (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris).
There are 11 known substitutes for 4820-01-539-3979: 3110-00-156-8194, 5365-00-191-0437, 3120-00-213-0800 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for 85DC22M-140-40PSI: Bolt Circle Nominal Diameter: 2.750 INCHES ALL ENDS IN; Bolt Hole Nominal Diameter: 0.625 INCHES ALL ENDS IN; Bonnet Type: INSIDE SPRING; Raised Face Nominal Height: 0.062 INCHES ALL ENDS IN. 24 total characteristics are documented in the Federal Logistics Information System.