Protrol Valves manufactur Power Cylinders. Their compact size and ease of installation make them ideally suited to a variety of mining applications.
These units require little maintenance, and they are mainly used outdoors where there is a requirement for linear motion, such as flop gates, the opening and closing of rooves and doors, coal sampling units and trousers, leg chutes, and clam shells for Reclaimer Tunnels. We consist of an enclosed electric motor fitted with a DC brake rated 150% load capacity, over travel protection and load limiting friction discs. It uses a gear set, ball screw and nut to extend and retract the rod end.
Applications for power cylinders are commonly found in mines, power stations, ports and any application where a self contained linear actuator with no leaky reservoir, hoses, tube fittings, etc. are needed to operate this unit.