Water solenoid valve 1. ISO 9001:2000, CE approved 2.1 million times life testing 3.compact design 4,One year gurrantee Water ... solenoid valve 2W31 Characteristic : 1.Direct lifting diaphragm construction; 2.Open ... 3.High frequency of DIN plug coilMedium : Air, City Gas, Water, Oil, Petroleum, etc.Temperature: NBR Seal: 14F to 176F , - ...