The Accu-Steer HM450 steering manifold is a two speed unit with lock valves on the output to the port and starboard lines, designed to interface hydraulic steering with autopilot and electronic control systems.
The HM450 has an input flow of 12 GPM and works with systems up to 250 cu.in.
The HM450 receives oil from an engine or electric driven pump, and outputs to steering lines, with the output flow determining the speed of the rudder. The built-in pressure relief valve is factory set at 750 PSI.