A ,This factory Bonnet the packing room has the water seal structure, when the connection passes over pressure 0, the 6-

1MPa water, may cause the system and the atmosphere isolates, guaranteed the system has good gas tightness.
 B, DS/The Z series uses Double gate the disc bidirectional spring-loaded seal, opens shuts, rapid, the seal  nimbly is

reliable.
 C ,Product material quality simple, compact reasonable, the overhaul is convenient, the service life is long.
 D  ,Sits the start-stop system on piping to use, must be at all opens or the ajar condition, does not have to use  in

adjusting the current capacity.
 E ,A valve connection form minute flange, the weld two kinds, the drive type is Hand, the motor two kinds.
 F , DS series liquid valve is suitable for Nominal Pressure ≦10.0MPa, Operating temperature ≦ 425℃, works agent is the 

water, steam, oil field and on non-caustic gas pipe makes the start-stop system to use, is suitable especially for the 

thermoelectric power station steam engine vacuum condenser system. http://www.dongjin-valve.com