YZQ worm gear box

This series is a 90°(±5° adjustable partial rotary manual drive device, suitable for ball valves, butterfly valves, plug valves and other types of valves. The box is made of ductile iron with novel style and beautiful appearance. All flanges adopt lSO 5211 international standard, which is more convenient to match with the valve. Ambient temperature :-20°C to +120°C(-4°F to +248°F).