The Valve,safety Relief, cataloged under National Stock Number 4820-00-287-3139, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse. Government technical data includes 22 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-287-3139 |
| Primary Part Number | 1990T-1/2X1-36-50PSI |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| Status | ACTIVE |
| Valve Discharge Flow Rate | 93.0 POUNDS PER HOUR LBS |
| Adjustable Pressure Range | +33.0 TO 55.0 POUNDS PER SQUARE INCH LBS |
| Disk Loading Method | SPRING |
| Connection Style | SOCKET ALL ENDS |
| Maximum Operating Temp | 800.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Minimum Operating Temp | 401.0 FAHRENHEIT DEGF |
| Nominal Pipe Size Accommodated | 0.500 INCHES SECOND END IN |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Nondefinitive Spec/std Data | A-1 TYPE AND C CLASS |
| Style Designator | ANGLE |
| Material | STEEL COMP 316 BODY |
| Opening Pressure Setting | 50.0 POUNDS PER SQUARE INCH LBS |
| Material Document and Classification | ASTM A479 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material Document and Classification | ASTM A479 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material | STEEL COMP 410 STEM |
| Flow Control Device | DISK |
| Material Document and Classification | ASTM A276 COND T ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1990T-1/2X1-36-50PSI | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 1990T-1/21 35-50PSI | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
| 1990 | Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse (USA) |
NSN 4820-00-287-3139 is a Valve,safety Relief, manufactured by Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-287-3139 has 3 cross-referenced part numbers: 1990T-1/2X1-36-50PSI (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 1990T-1/21 35-50PSI (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse), 1990 (Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse).
There are 12 known substitutes for 4820-00-287-3139: 2990-00-019-6106, 4730-00-202-9326, 3830-00-353-3078 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1990T-1/2X1-36-50PSI: Valve Discharge Flow Rate: 93.0 POUNDS PER HOUR LBS; Adjustable Pressure Range: +33.0 TO 55.0 POUNDS PER SQUARE INCH LBS; Disk Loading Method: SPRING; Connection Style: SOCKET ALL ENDS. 23 total characteristics are documented in the Federal Logistics Information System.