NSN 4820-01-271-7889
Safety Relief Valve
Datasheet
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Product description
Safety Relief Valve NSN 4820-01-271-7889.
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MPN or Model
D559B-2M-6
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Schedule B
8481.40.0000 (Safety or relief valves) -
NMF (National Motor Freight)
051080 - Faucets, Bibcocks, Gates Valves -
Unit Weight (Est.)
0.3 lb
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Safety Relief Valve
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.

Pricing and Availability
Get a quote for 4820-01-271-7889 safety relief valveManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
---|---|
D559B-2M-6 | Circor Aerospace, Inc. |
D500-2M-6 | Circor Aerospace, Inc. |
Stock Check

Availability for this item was last checked on 04/16/25.
The quantities and conditions available at the time were:
- NE: 1
- NS: 4