NSN 4820-01-256-8745 D8414052, D841-4052, D8414052CP
Product Details | SAFETY RELIEF VALVE
4820-01-256-8745 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: D8414052, D841-4052, D8414052CP, D841-4052CP, D8414952, D841-4952, 4820-01-256-8745, 01-256-8745, 4820012568745, 012568745
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 48 | 09 JUN 1987 | 01-256-8745 | 05488 ( VALVE, SAFETY RELIEF ) |
Drawings & Photos | NSN 4820-01-256-8745
Demand History | NSN 4820-01-256-8745
| Part Number | Request Date | QTY | Origin |
|---|---|---|---|
| 4820-01-256-8745 | 2024-05-149 | 1 | DIBBS |
| 4820-01-256-8745 | 2024-04-105 | 5 | DIBBS |
| 4820-01-256-8745 | 2023-11-312 | 1 | DIBBS |
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Technical Data | NSN 4820-01-256-8745
| Characteristic | Specifications |
|---|---|
| MATERIAL | COPPER ALLOY 922 BODY COPPER ALLOY FLOW CONTROL DEVICE STEEL CORROSION RESISTING SEAT STEEL CORROSION RESISTING STEM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE BODY ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE AISI 303 ASSN STD SINGLE MATERIAL RESPONSE SEAT AISI 303 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| STYLE DESIGNATOR | C1 ANGLE |
| FLOW CONTROL DEVICE | DISK |
| MEDIA FOR WHICH DESIGNED | OXYGEN, LIQUID SINGLE RESPONSE |
| MAXIMUM OPERATING PRESSURE | 460.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| MAXIMUM OPERATING TEMP | 165.0 DEG FAHRENHEIT SINGLE RESPONSE |
| DISK LOADING METHOD | SPRING |
| FURNISHED ITEMS AND QUANTITY | 2 TAILPIECE |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | REQUIRES SPECIAL CLEANING AND PACKAGING IAW MIL-C-52211,FOR OXYGEN/NITROGEN/HYDROGEN SERVICE |
| CRITICALITY CODE JUSTIFICATION | ZZZY |
| MANUFACTURERS CODE | 96101 |
| DESIGN CONTROL REFERENCE | D841-4052 |
Restrictions/Controls & Freight Information | NSN 4820-01-256-8745
| 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 4820-01-256-8745
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 | J | NOT STOCKED, CENTRALLY PROCURED # (NON-STOCKED ITEMS) IMM/Service centrally managed but not stocked item. Procurement will be initiated only after receipt of a requisition. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
1 EA : Each |