NSN 4820-01-256-8744 D8414050, D841-4050, D8414050CP
Product Details | SAFETY RELIEF VALVE
4820-01-256-8744 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: D8414050, D841-4050, D8414050CP, D841-4050CP, UU1551T, UU-1551-T, UU1551TCP, UU-1551-TCP, 9955K5IMTYPE, 4820-01-256-8744, 01-256-8744, 4820012568744, 012568744
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 09 JUN 1987 | 01-256-8744 | 05488 ( VALVE, SAFETY RELIEF ) |
Drawings & Photos | NSN 4820-01-256-8744
Demand History | NSN 4820-01-256-8744
| Part Number | Request Date | QTY | Origin |
|---|---|---|---|
| UU-1551-T | 2023-09-264 | 3 | DIBBS |
| UU-1551-T | 2022-12-347 | 2 | DIBBS |
| UU-1551-T | 2022-10-304 | 1 | DIBBS |
| UU-1551-T | 2022-10-293 | 1 | DIBBS |
| UU-1551-T | 2022-06-173 | 1 | DIBBS |
| UU-1551-T | 2022-06-160 | 1 | DIBBS |
| TYPE | 2021-08-233 | 0 | |
| TYPE | 2021-07-194 | 0 | |
| TYPE | 2020-05-126 | 0 | |
| UU-1551-T | 2019-04-94 | 6 | DIBBS |
| 4820-01-256-8744 | 2018-12-339 | 8 | DIBBS |
| 4820-01-256-8744 | 2018-09-270 | 4 | DIBBS |
Cross Reference | NSN 4820-01-256-8744
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 9955.K 5IM,TYPE | 96101 | GAS EQUIPMENT ENGINEERING CORPORATION, THE |
| D841-4050 | 96101 | GAS EQUIPMENT ENGINEERING CORPORATION, THE |
| D841-4050CP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |
| UU-1551-T | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY |
| UU-1551-T | 15187 | PENTAIR VALVES & CONTROLS US LP DBA NAVY PRODUCT TEAM |
| UU-1551-TCP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |
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Related Products | NSN 4820-01-256-8744
Technical Data | NSN 4820-01-256-8744
| Characteristic | Specifications |
|---|---|
| MATERIAL | COPPER ALLOY 922 BODY NICKEL ALLOY 400 FLOW CONTROL DEVICE NICKEL ALLOY 400 SEAT NICKEL ALLOY 400 STEM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE BODY QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE SEAT QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| STYLE DESIGNATOR | C1 ANGLE |
| FLOW CONTROL DEVICE | DISK |
| MEDIA FOR WHICH DESIGNED | OXYGEN, LIQUID SINGLE RESPONSE |
| MAXIMUM OPERATING PRESSURE | 400.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| VALVE DISCHARGE FLOW RATE | 128.0 CUBIC FEET PER MINUTE |
| DISK LOADING METHOD | SPRING |
| OPENING PRESSURE SETTING | 80.0 POUNDS PER SQUARE INCH |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | REQUIRES SPECIAL CLEANING AND PACKAGING IAW MIL-C-52211,FOR OXYGEN/NITROGEN/HYDROGEN SERVICE |
| CRITICALITY CODE JUSTIFICATION | ZZZY |
| MANUFACTURERS CODE | 15187 |
| DESIGN CONTROL REFERENCE | UU-1551-T |
Restrictions/Controls & Freight Information | NSN 4820-01-256-8744
| 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: | S | The item is a non-aviation Critical Safety Item (CSI) whose failure will result in serious damage to equipment or serious injury or death to personnel. |
| Automatic Data Processing Equipment: | 0 | Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9) |
| Category | Code | Description |
|---|---|---|
| NMF Description | 127220 | PRESSURE REG/RED/RELIEF VALVES NOI |
| Less than car load rating | P | 77.5 |
| Less than truck load rating | P | 77.5 |
| Water commodity Code | 594 | unknown |
| Originating Activity Code | HD | Naval Inventory Control Point Mechanicsburg, PA 17055-0788 |
| 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 4820-01-256-8744
Navy| Category | Code | Description |
|---|---|---|
| Cognizance Codes | 9B | Navy-owned stocks of DLA material Naval Inventory Control Point, Mechanicsburg |
| Special Material ID | CP | An item that requires special cleaning and packaging for oxygen/nitrogen service (e.g, valves, piping systems, generators). |
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DN | Department of the Navy |
| Service Organization | N | U.S. Navy |
| 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 |