About: http://webisa.webdatacommons.org/401087717

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	They are used in pipelines to protect equipment such as pumps, meters, control valves, steam traps, and regulators.
http://www.w3.org/ns/prov#wasQuotedFrom	globalspec.com