About: http://webisa.webdatacommons.org/35250375

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The annular valve member 13 is of resilient, elastic material such as rubber or synthetic rubber, and extends inwardly and in a downstream direction, generally at 45???, to seal against the pintle 14.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com