Product Details | SAFETY RELIEF VALVE

4820-01-218-1801 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: 4702K11, 4702R11, 4820-01-218-1801, 01-218-1801, 4820012181801, 012181801

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 08 OCT 1985 01-218-1801

Drawings & Photos | NSN 4820-01-218-1801


Demand History | NSN 4820-01-218-1801

Part Number Request Date QTY Origin
4820-01-218-1801 2013-08-234 15 DIBBS
4820-01-218-1801 2011-11-320 5 DIBBS
4820-01-218-1801 2010-11-315 1 DIBBS

Cross Reference | NSN 4820-01-218-1801

Part Number Cage Code Manufacturer
4702K11 39428 MCMASTER-CARR SUPPLY COMPANY
4702R11 39428 MCMASTER-CARR SUPPLY COMPANY

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Technical Data | NSN 4820-01-218-1801

Characteristic Specifications
THREAD SERIES DESIGNATOR NPT ALL ENDS
VALVE OPERATION METHOD MANUAL
NOMINAL THREAD SIZE 0.750 INCHES ALL ENDS
THREAD DIRECTION RIGHT-HAND ALL ENDS
MEDIA FOR WHICH DESIGNED WATER, FRESH 2ND RESPONSE
CONNECTION STYLE G9 PLAIN,OPTIONAL END(PIPE) ALL ENDS
OPENING PRESSURE SETTING 30.0 POUNDS PER SQUARE INCH
MEDIA FOR WHICH DESIGNED STEAM 1ST RESPONSE
MATERIAL COPPER ALLOY BODY
CONNECTION TYPE THREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATOR C1 ANGLE

Restrictions/Controls & Freight Information | NSN 4820-01-218-1801

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem 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 671 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 B Construction materials: Includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
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 4820-01-218-1801

Category Code Description
Stores Account Code1Marine Corps Stock Fund Account Item.
Combat Essentiality Code5Critical Repair Part to a Combat Essential End Item. Those parts or components whose failure in a combat essential end item will render the end item inoperative or reduce its effectiveness below the minimum acceptable level of efficiency.
Materiel Management CodeBAll CommoditiesDefense Logistics Agency, (DLA,)
Echelon Management Code2ICP/DSSC Marine Corps-managed Recoverability Code D items and Defense Logistics Agency (DLA)/TACOM/GSA) items which the integrated manager has not decontrolled.
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDMU.S. Marine Corps
Service OrganizationMU.S. Marine Corps
ReparabilityZNonreparable item. When unserviceable, condemn and dispose at the level indicated by the first digit of the maintenance code.
Acquisition Advice CodesJNOT 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 CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each
Category Code Description
Cognizance Codes9BNavy-owned stocks of DLA material
Naval Inventory Control Point, Mechanicsburg
Source of SupplySMSDefense Logistics Agency
Enterprise Business Systems
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesJNOT 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 CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each