... valve-2W21 1,Direct lifting diaphragm construction 2,Open from zero bar for low pressure Detailed Product Descriptionsolenoid valve 1. ISO ... valve 2W21Characteristic : 1.Direct lifting diaphragm construction; 2.Open from zero bar for low pressure system use 3.High frequency of ... - 12V,24V AC - 24V,120V, 240V@60HZ 110V, 220V@50HZ Tolerance: +/- 10%Coils : S51B, 40VA(AC), 30W(DC), IP65 100%ED ...