DDNRV
DUAL DOUBLE
NON-RETURN VALVE
DUAL'S Double Non-Return Valve operates on the discharge side of two pumps in parallel. Both pumps can run simultaneously or independently. When one pump is switched off, the ball will automatically drop back stopping the back flow to the other pump.
Seats
(Replaceable)
Natural Rubber, Urethane or Stainless Steel.
FEATURES
-
Flush ports.
-
As the elastomer coated ball moves, it rotates with the flow.
-
This ensures that the valve self cleans and permits it to open and close reliably even under severe conditions of slurry build up.
-
Minimal pressure drop.
-
Replaceable ball and seats.
APPLICATIONS
-
All slurry applications requiring trouble free pump changeover.
-
Particularly suited for mill cyclone feed pumps.
SPECIFICATIONS
Size Range
Valve body and face-to-face dimensions can be changed to suit existing applications.
65mm - 900mm.
Body Type
Fabricated carbon steel.
The valve body can be lined in Natural Black, Neoprene, Hypalon, EPDM, Rubber, Ceramic
or Urethane.
Pressure Rating
10, 16, 25, 40 and 60 Bar.
Ball
(Replaceable)
Urethane or Rubber.
Flanged Connection
Shouldered end connections for victaulic port in ball body.
Valve Intervals
Valve flanged to customer specifications.
Flushing port in ball body.
Other
Different mounting brackets can be fitted to
suit application.