1. According to the driving mode:

(1) Electric butterfly valve.
(2) Pneumatic butterfly valve.
(3) Hydraulic butterfly valve.
(4) Manual butterfly valve.

2. According to the structure:

(1) Concentric butterfly valve.
(2) Single eccentric butterfly valve.
(3) Double eccentric butterfly valve.
(4) Three eccentric butterfly valve.

3. According to the material of sealing surface:

(1) Soft seal butterfly valve.
(2) Metal hard seal butterfly valve.

4. According to working pressure:

(1) Vacuum butterfly valve.
(2) Low pressure butterfly valve.
(3) Medium pressure butterfly valve.
(4) High pressure butterfly valve.
(5) Ultra high pressure butterfly valve.

5. According to the working temperature:

(1) High temperature butterfly valve.
(2) Medium temperature butterfly valve.
(3) Normal temperature butterfly valve.
(4) Low temperature butterfly valve.
(5) Ultra low temperature butterfly valve.

6. According to the connection mode:

(1) Wafer type butterfly valve.
(2) Flange type butterfly valve.
(3) Lug type butterfly valve.
(4) Welded type butterfly valve.