1, the use of flange bolts connection, both ends of the branch pipe flange connection or butt welding connection. 
 2, Stuffing box is designed into a water seal structure, access to 0.6 ~ 1.6Mpa water filler, small friction, sealed, the system can be isolated from the atmosphere, to ensure good air tightness. 
 3, the opening and closing pieces of double gate with two-way flexible seal, open and close easily, sealed, good performance. 
 4, the stem by quenching and nitriding surface treatment, good corrosion resistance, scratch resistance and wear resistance. 
 5, the structure is simple, compact and reasonable, easy maintenance, long life, handsome in appearance. 
 6, the valve work must be fully open or fully closed position, can not do with the control valve.
 

Second, the main components of water seal valve materials

Third, water seal gate valve main dimensions

Nominal pressure 1.6 MPa