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825y; reduced backflow preventer; consist of 2 y pattern spring load check valvesw/differential pressure relief valve between them; inlet and outlet shutoff valves and 4 testcocks; bronze body, caps, relief valve body and cover; nitrile seat discs; fabric reinforced nitrile diaphragms; stainless steel springs; wear and corrosion resistant acetal internal moving parts; fully ported, NON-Rising stem bronze gate valves; working pressure 175 psi; hydrostatic test pressure 350 psi; 32 to 180 deg. f temp. rrange; size 3/4 in.; length 11 1/4 in.; height 7 5/8 in.
An assembly of items consisting of two or more complete valves on a common mounting; mounted on each other; or joined together with fitting(s), hose(s), tube(s), pipe(s), or the like. For items consisting of two or more valves in a common body, see valve assembly, manifold.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious metal content is unknown
The item does not have a nuclear hardened feature but does have other critical feature(s) such as tolerance, fit restrictions or application.
HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.
PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.
ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.
ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.
CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.