Electric ventilation butterfly valve

Handle grooved butterfly valve

Worm gear grooved butterfly valve

Marine screw wafer butterfly valve

Marine spiral flange butterfly valve

Marine center type worm type butterfly valve

Hydraulic marine bronze double eccentric butterfly valve

Worm gear Marine carbon steel double eccentric butterfly valve

Marine double eccentric pneumatic butterfly valve

No pin nylon plate butterfly valve

Electric nylon butterfly valve

Handle flue gas desulfurization butterfly valve