REXA Electro-hyrdaulic actuators
REXA Xpac actuators feature a selfcontained Electraulic™ power module utilizing the patented Flow Match System. This technology allows precise positioning independent of load variation and locks the cylinder in place when no movement is required. Hydraulic flow is generated by an internal positive displacement gear pump driven by a continuous duty motor without limitations on start, stop, or reverse cycles.Power modules are available in B, C, ½D and D sizes. The difference between the sizes is the maximum flow rate of the hydraulic oil and thus the maximum stroking speed for an actuator. Size C has three times the capacity of a B; the ½D has six times the capacity of a B; and the D size has twelve times the capacity of a B. Greater speeds can be obtained by using a manifold containing multiple modules or REXA's unique Booster Pump system. This approach to product confi guration offers a high degree of commonality and reduces spare parts inventory. The required rotation rate for an application determines the size and quantity of the modules. Regardless of the selected power module, the rated torque remains unchanged for any given cylinder size.The R series actuator is designed by combining a quarter turn rack and pinion cylinder and the power modules. Torques from 600 lb·in to 400 000 lb·in are standard. A female keyed shaft connection and four bolt mounting pattern make for a straight forward adaptation to ball valves, butterfl y valves, louvers or any device requiring rotation up to 90 degrees (optional to 280 degrees).