The Accu-Steer HM190 steering manifold is a single speed unit with lockvalves on the output to the port and starboard lines. It is designed to interface hydraulic steering with autopilot and electric control systems. The HM190 receives oil from an engine driven or electric driven pump and outputs to the steering lines. This output flow from the manifold determines the speed of the rudder. The output flow of the HM190 is adjustable between 0 and 10.0 cu. in. per second. The manifold has built-in pressure relief valves, which are factory set at 750 psi. Available in both 12 VDC and 24 VDC.FEATURES: Adjustable speed or flow control cartridge 22 4-way solenoid valve (12 VDC, 24 VDC or AC voltages) 22 Output lockvalves (double pilot operated check valves) 22 Pressure relief valve (factory set at 750 psi) 22 Valve housing blue anodized aluminum with laser etching