3/2 solenoid pinch valves. Solenoid pinch valves; only the tube is in contact with the fluid. One tube is normally closed (N/C) and the other is normally open (N/O). High flow coefficient. For use with flexible silicone hoses or hoses with equivalent elasticity and hardness (50 Shore A hardness). DIN 43650-Form A Standard solenoid valve connector for DIN 46340 (3-contact) quick connection. Type DIN 46340 corresponds to the standard for Faston tabs.