About: http://webisa.webdatacommons.org/411803002

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 spring means 27 and diaphragm 17 are sized to allow movement of the diaphragm to pass fluid flow when the pressure of that flow exceeds a predetermined level, such as about 0.5 psi.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com