... :2008, 27/93 EC 4)Established in 1987 one way water valve 1. Structure:2. Specification:1) DN40- ... lever, gearbox, pneumatic and electric Actuator) and so on. On off and controlling flow of valve are made by ... Simple, compact structure, quick 90 degree on-off operation.3. Disc has two-way bearing, perfect seal, without leakage under the ... closing operation.5. Packing:6. Certificate: one way water valve