Product Details | VACUUM BREAKING VALVE

4820-00-138-3750 An item designed to automatically relieve vacuum, by the intake of air, when the internal pressure falls below atmospheric pressure. See also VALVE, VACUUM REGULATING.

Part Alternates: 28544-1 1-2, 28544112, 4820-00-138-3750, 00-138-3750, 4820001383750, 001383750

Valves | Valves, Nonpowered

Supply Group (FSG) NSN Assign. NIIN
48 09 AUG 1971 00-138-3750

Drawings & Photos | NSN 4820-00-138-3750


Cross Reference | NSN 4820-00-138-3750

Part Number Cage Code Manufacturer
28544-1 1-2 51729 DRESSER, INC. DBA DRESSER ROOTS BLOWERS &

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Technical Data | NSN 4820-00-138-3750

Characteristic Specifications
BODY STYLE B2 SINGLE CONNECTION, STRAIGHT FLOW
BODY MATERIAL BRONZE
SEAT MATERIAL BRONZE
FLOW CONTROL DEVICE DIAPHRAGM
FLOW CONTROL DEVICE MATERIAL ANY ACCEPTABLE
STEM MATERIAL BRONZE
END CONNECTION QUANTITY 1
FIRST END CONNECTION TYPE THREADED EXTERNAL PIPE
FIRST END STYLE DESIGNATOR J6 PLAIN
FIRST END NOMINAL PIPE SIZE ACCOMMODATED 1.500 INCHES
FIRST END THREAD DIRECTION RIGHT-HAND
TEMP ADJUSTABILITY NOT ADJUSTABLE
TEMP RATING NOT RATED
ABSOLUTE PRESSURE SETTING NOT RATED
ABSOLUTE PRESSURE RANGE NOT RATED

Restrictions/Controls & Freight Information | NSN 4820-00-138-3750

Category Code Description
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.
Precious Metals Indicator Code:UPrecious metal type is unknown
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
No Freight Information