The B5G8 MATCO Gear Box with Hand Wheel is a heavy-duty actuator designed for precise, low-effort operation of 8" B5 Series butterfly valves. When flow control demands more torque than a lever can deliver, the gear box converts hand wheel rotation into smooth, reliable valve actuation — even under full line pressure.

Built for agricultural and industrial irrigation systems where 8" butterfly valves are used for main line shutoff, field splitting, or flow regulation, the B5G8 is the go-to upgrade for operators who need consistent, repeatable control without excessive effort.

Fits: MATCO B5 Series 8" butterfly valves
Actuator Type: Gear box with hand wheel
Application: Agricultural irrigation, industrial flow control
Benefit: Reduces operating torque for easier valve actuation
Compatible Valve: B5-RLO8, B5-RWG8

Also available for 2"-3" (B5G23), 4" (B5G4), and 5"-6" (B5G56) valves.

B5G8 - MATCO Gear Box w/ Hand Wheel, 8" Valve