... made of cemented carbide materials, with good erosion resistance, which can greatly increase the life of the valve.1)Specification grade: PSL1-42 ... )Performance grade: PR1-23)Material grade: AA,BB,CC,DD,EE,FF,HH4 ... )Temperature grade:(-29ºC~121º) grade PU Model JG-35The standards of performingApplicablestandards:API 16C The ...