... Medium:Air, City Gas, Water, Oil, Petroleum, etc. Port Thread:BSPP ,BSPT ,NPT ,Flange,M8X1 Detailed Product DescriptionWater valve 1. ISO 9001:2000 ... guarantee,Water valve 2W12Characteristic : 1.Direct lifting diaphragm construction; 2.Open from zero bar for low pressure system use 3.High frequency of DIN plug ...