Hi, this is COVNA Wafer type butterfly valve.
It can be manual operated by lever or gear operated.
Also it can be controlled by Pneumatic actuator or Electric actuator.
For Pneumatic actuator, it can be both Double acting or Single acting.
For Electric actuator, there are ON/OFF Type, Regulation type or Intelligent type actuator.
Regarding the butterfly valve body and disc, the material could be both cast iron and stainless steel.
And the sealing material could be EPDM or PTFE, mainly depends on your working environment and fluid.
Besides, the size of the wafer type butterfly valve is up to DN1800 which is 72 inch.
And this kind of butterfly valve is widely used in some industries such as HVAC, Water treatment, and Paper and Pulp industry.

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