4820-00-844-7744
Safety Relief Valve
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Official Item Classification
- Name
- Safety Relief Valve
- (NSN) National Stock Number
- 4820-00-844-7744
- (FSG) Federal Supply Group
- 48 Valves
- (FSC) Federal Supply Classification
- 4820 Nonpowered Valves
- (INC) Item Name Code
- 05488
- (FIIG) Federal Item Identification Guide
- A046B0
- Date
- 01/01/1962 (64 years ago)
spring disk loading method, poppet flow control device, -40.0 fahrenheit 1st response maximum operating temp, 1.000 inches 1st end nominal pipe size accommodated, right-hand 1st end thread direction
Specs & Compatibility
1.000 inches 1st end
right-hand 1st end
poppet
spring
-40.0 fahrenheit 1st response
250.0 fahrenheit 2nd response
plain (pipe) 1st end
automatic
threaded external pipe 1st end
valve stem lock shield and bonnet packing and pressure tight outlet side
200.0 pounds per square inch single response
1.000 inches 1st end
21.0 pounds per square inch
pop-off type
steel comp 303 overall
acetylene 2nd response
air 1st response
ammonia, gaseous 3rd response
hydrogen 5th response
refrigerant 12 4th response
straight thru note: to be used for valve bodies of one section only.
npt 1st end
as differentiated by pre-set setting
Regulatory Compliance
Precious metal content is unknown
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
0005488
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