1, Design novel, reasonable, structure unique, the weight is light, opens shuts the news fast.

2, Operation moment of force is small, the ease of operation, reduces effort cleverly.

3, May any position installment, the service be convenient.

4, Seal may replace, the sealing property reliably achieved bidirectional seal zero divulges.

5, Packing material must get older, anti-corrosive, the service life is longer and so on the characteristic.

Design Standard   GB/T 12238-1989 
Connectivity Standard   GB/T 9113.1  JB 78-1994  GB/T 9115.1 
Experimental Standard   JB/T 9092-1999  GB/T 13927-1992 
Face to Face    GB/T 12221-1989 

Standard Criteria   GB 
Medium Temperature [ ℃]    ≤120 
The shell pressure testing [ MPa]   0.9  1.5  2.4 
Sealing test pressure  [ MPa]   0.66  1.1  1.76 
air tightness test pressure [ MPa]   0.6 
Medium    Air  Coal Gas  Oil  Sewage  Vapor  Water 
Application Fields   Chemical industry  Electricity  Food  Oil  Paper mill  Textile and other light industries  medicine