SMT series hydraulic  motor is disc valve motors , Characteristic features : 1. use low pressure of start-up ,provide smooth reliable operation and high efficiency . 2. shaft use bearing , higher pressure, speed and higher radial force 3.shaft seal can bear high pressure of back and the motor  can be used in parallel or series 4.Widevariety of mounting flanges , shaft port and easy installation. Below is the technical data of SMT hydraulic motor    http://www.chinakersen.com/