Material:PVC, SUS304, SUS316, PTFE Caliber:DN10, DN15, DN25, DN32, DN40 Safety valve is installed on the outlet pipeline of metering pump. When the system pressure becomes abnormal, safety valve protects metering pump from any damages, also named relief valve. Material:PVC, SUS304, SUS316, PTFECaliber:DN10, DN15, DN25, DN32, DN40