NSN 4820-01-442-2081 20391, 20391 ASSY 20391-01-3-3300, 2039101E3300
Product Details | SAFETY RELIEF VALVE
4820-01-442-2081 A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes VALVE (1), RELIEF, PRESSURE AND TEMPERATURE.
Part Alternates: 20391, 20391 ASSY 20391-01-3-3300, 2039101E3300, 20391-01-E-3300, 20391ASSY203910133300, 4820-01-442-2081, 01-442-2081, 4820014422081, 014422081
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 07 MAR 1997 | 01-442-2081 | 05488 ( VALVE, SAFETY RELIEF ) |
Drawings & Photos | NSN 4820-01-442-2081
Demand History | NSN 4820-01-442-2081
| Part Number | Request Date | QTY | Origin |
|---|---|---|---|
| 2039101E3300 | 2025-12-341 | 9 | DIBBS |
| 20391-01-E-3300 | 2025-12-341 | 9 | DIBBS |
| 2039101E3300 | 2025-10-287 | 9 | DIBBS |
| 20391-01-E-3300 | 2025-10-287 | 9 | DIBBS |
| 2039101E3300 | 2025-10-283 | 1 | DIBBS |
| 20391-01-E-3300 | 2025-10-283 | 1 | DIBBS |
| 2039101E3300 | 2025-09-268 | 1 | DIBBS |
| 20391-01-E-3300 | 2025-09-268 | 1 | DIBBS |
| 2039101E3300 | 2025-02-43 | 3 | DIBBS |
| 20391-01-E-3300 | 2025-02-43 | 3 | DIBBS |
| 2039101E3300 | 2024-12-347 | 3 | DIBBS |
| 20391-01-E-3300 | 2024-12-347 | 3 | DIBBS |
| 2039101E3300 | 2024-05-123 | 2 | DIBBS |
| 20391-01-E-3300 | 2024-05-123 | 2 | DIBBS |
| 2039101E3300 | 2024-02-46 | 2 | DIBBS |
| 20391-01-E-3300 | 2024-02-46 | 2 | DIBBS |
| 2039101E3300 | 2022-08-223 | 2 | DIBBS |
| 20391-01-E-3300 | 2022-08-223 | 2 | DIBBS |
| 2039101E3300 | 2022-07-195 | 1 | DIBBS |
| 20391-01-E-3300 | 2022-07-195 | 1 | DIBBS |
| 2039101E3300 | 2022-04-115 | 2 | DIBBS |
| 20391-01-E-3300 | 2022-04-115 | 2 | DIBBS |
| 2039101E3300 | 2022-01-25 | 2 | DIBBS |
| 20391-01-E-3300 | 2022-01-25 | 2 | DIBBS |
| 2039101E3300 | 2021-10-284 | 2 | DIBBS |
| 20391-01-E-3300 | 2021-10-284 | 2 | DIBBS |
| 2039101E3300 | 2021-07-199 | 2 | DIBBS |
| 20391-01-E-3300 | 2021-07-199 | 2 | DIBBS |
| 2039101E3300 | 2020-10-303 | 1 | DIBBS |
| 20391-01-E-3300 | 2020-10-303 | 1 | DIBBS |
| 2039101E3300 | 2020-07-211 | 5 | DIBBS |
| 20391-01-E-3300 | 2020-07-211 | 5 | DIBBS |
| 4820-01-442-2081 | 2020-07-205 | 1 | US |
| 4820-01-442-2081 | 2020-07-205 | 1 | US |
| 2039101E3300 | 2020-07-183 | 3 | DIBBS |
| 20391-01-E-3300 | 2020-07-183 | 3 | DIBBS |
| 2039101E3300 | 2020-06-156 | 1 | DIBBS |
| 20391-01-E-3300 | 2020-06-156 | 1 | DIBBS |
| 2039101E3300 | 2020-02-41 | 5 | DIBBS |
| 20391-01-E-3300 | 2020-02-41 | 5 | DIBBS |
| 2039101E3300 | 2019-07-192 | 2 | DIBBS |
| 20391-01-E-3300 | 2019-07-192 | 2 | DIBBS |
| 4820-01-442-2081 | 2018-05-140 | 3 | DIBBS |
| 4820-01-442-2081 | 2018-02-36 | 1 | US |
| 4820-01-442-2081 | 2018-02-36 | 2 | DIBBS |
| 4820-01-442-2081 | 2017-11-311 | 1 | DIBBS |
| 4820-01-442-2081 | 2017-11-306 | 1 | DIBBS |
| 4820-01-442-2081 | 2017-07-198 | 2 | DIBBS |
| 4820-01-442-2081 | 2017-06-180 | 2 | DIBBS |
| 4820-01-442-2081 | 2017-06-155 | 2 | DIBBS |
| 4820-01-442-2081 | 2017-02-33 | 2 | DIBBS |
| 4820-01-442-2081 | 2016-10-291 | 4 | DIBBS |
| 4820-01-442-2081 | 2016-09-256 | 2 | DIBBS |
| 4820-01-442-2081 | 2016-02-50 | 2 | DIBBS |
| 4820-01-442-2081 | 2015-11-330 | 2 | DIBBS |
| 4820-01-442-2081 | 2015-09-265 | 2 | DIBBS |
| 4820-01-442-2081 | 2015-02-36 | 1 | DIBBS |
| 4820-01-442-2081 | 2014-06-181 | 2 | DIBBS |
| 4820-01-442-2081 | 2014-06-169 | 2 | DIBBS |
| 4820-01-442-2081 | 2014-06-152 | 2 | DIBBS |
| 4820-01-442-2081 | 2014-03-85 | 2 | DIBBS |
| 4820-01-442-2081 | 2014-03-70 | 2 | DIBBS |
| 4820-01-442-2081 | 2013-11-320 | 2 | DIBBS |
| 4820-01-442-2081 | 2013-11-319 | 2 | DIBBS |
| 4820-01-442-2081 | 2013-10-304 | 2 | DIBBS |
| 4820-01-442-2081 | 2013-08-230 | 1 | DIBBS |
| 4820-01-442-2081 | 2013-08-220 | 1 | DIBBS |
| 4820-01-442-2081 | 2013-07-197 | 1 | DIBBS |
| 4820-01-442-2081 | 2009-07-209 | 2 | DIBBS |
| 4820-01-442-2081 | 2009-03-89 | 1 | United States |
| 4820-01-442-2081 | 2009-01-20 | 1 | DIBBS |
| 4820-01-442-2081 | 2008-11-327 | 1 | DIBBS |
Cross Reference | NSN 4820-01-442-2081
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 20391 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |
| 20391 ASSY 20391-01-3-3300 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |
| 20391-01-E-3300 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |
| 20391-01-E-3300 | 15187 | PENTAIR VALVES & CONTROLS US LP DBA NAVY PRODUCT TEAM |
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Related Products | NSN 4820-01-442-2081
Technical Data | NSN 4820-01-442-2081
| Characteristic | Specifications |
|---|---|
| MATERIAL | NICKEL ALLOY BODY NICKEL ALLOY FLOW CONTROL DEVICE NICKEL ALLOY SEAT NICKEL ALLOY STEM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A494 ASSN STD SINGLE MATERIAL RESPONSE BODY ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE SEAT ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| STYLE DESIGNATOR | C1 ANGLE |
| FLOW CONTROL DEVICE | DISK |
| MAXIMUM OPERATING PRESSURE | 3450.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| MAXIMUM OPERATING TEMP | 150.0 DEG FAHRENHEIT SINGLE RESPONSE |
| VALVE OPERATION METHOD | AUTOMATIC |
| CONNECTION TYPE | UNTHREADED INTERNAL PIPE ALL ENDS |
| CONNECTION STYLE | G30B SOCKET WITH BRAZING RING ALL ENDS |
| NOMINAL PIPE SIZE ACCOMMODATED | 0.250 INCHES ALL ENDS |
| DISK LOADING METHOD | SPRING |
| OPENING PRESSURE SETTING | 3300.0 POUNDS PER SQUARE INCH |
| III END ITEM IDENTIFICATION | WASP CLASS LHD |
Restrictions/Controls & Freight Information | NSN 4820-01-442-2081
| Category | Code | Description |
|---|---|---|
| Shelf-Life Code: | 0 | Nondeteriorative |
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | A | Non-Munitions List Item/ Non-Strategic List Item - Demilitarization not required. |
| Controlled Inventory Item Code: | U | UNCLASSIFIED |
| Precious Metals Indicator Code: | A | Item does not contain precious metal |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| NMF Description | 127220 | PRESSURE REG/RED/RELIEF VALVES NOI |
| Less than car load rating | ||
| Less than truck load rating | P | 77.5 |
| Water commodity Code | 594 | unknown |
| Originating Activity Code | AX | Defense Supply Center Columbus Columbus, OH 43216-5000 |
| Air Dimension Code | A | Shipment is not a consolidation and does not exceed 72 inches in any dimension. |
| Air Commodity | V | Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above. |
| Air Special Handling | Z | No special handling required. |
| Special Handling Code | 9 | unknonwn |
| HAZMAT | ||
| Type of Cargo | Z | No special type of cargo code applicable |
Management | NSN 4820-01-442-2081
Navy| Category | Code | Description |
|---|---|---|
| Cognizance Codes | 3B | Navy-owned stocks of field level repairable DLA material Naval Inventory Control Point, Mechanicsburg |
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DN | Department of the Navy |
| Service Organization | N | U.S. Navy |
| Reparability | D | Field Level Reparables |
| Acquisition Advice Codes | Z | INSURANCE/NUMERIC STOCKAGE OBJECTIVE ITEM # Items which may be required occasionally or intermittently, and prudence requires that a nominal quantity of materiel be stocked due to the essentiality or the lead time of the item. 1. The item is centrally managed, stocked, and issued. 2. Requisitions will be submitted in accordance with IMM/Service requisitioning procedures. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
1 EA : Each |