piston check valve

http://w3id.org/readi/rdl/CFIHOS-30000857 an entity of type: Class

A lift check valve that has a free gravity or spring loaded piston type closure member.
piston check valve 
CFIHOS-30000857 
xsd:dateTime 2019-02-08T15:44:01Z 
xsd:dateTime 2019-10-01T00:56:18Z 
CR0011;CR0029 
STANDARD 
xsd:boolean true 

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