... approved 2.1 million times life testing 3.compact design 4,One year gurrantee Water solenoid valve 2W31Characteristic : 1.Direct lifting diaphragm ... construction; 2.Open from zero bar for low pressure system use 3.High ... ,1/2,3/4,1Port Thread: BSPP ,BSPT ,NPT ,Flange, UNFOrifice (mm): 12,15,20,25Voltage: DC - 12V,24V AC - 24V ...