Common butterfly valve models are as follows: ventilation butterfly valve models: D34 1H, D341w; ; Three eccentric hard seal butterfly valve models: D73H, D373H, D673H, D973H；; Butterfly valve models with neutral flange: D4 1X, D34 1X, D64 1X, d941x; ; Model of center line clamping butterfly valve: D7 1X, D37 1X, D67 1X, d971x.

The specifications and dimensions of butterfly valves are as follows: