In order to solve problems that conventional electromechanical converter of 2D valve had deficiency of complicated magnetic circuit, intricate structure and lacking high pressure resistance, a torque motor with simple structure, limited working stroke and high pressure resistance was developed based on symmetrical magnetic circuit with singlephase excitation. Working principle and detailed structure were discussed. Prototype motor was fabricated and test rig for static and dynamic characteristics was built. Torqueangle characteristics and frequency response were studied using approaches of magnetic circuit analysis, FEM simulation and experiments. The experimental results were in a close agreement with the simulated results, which indicated the torqueangle characteristic was close to linear relationship and its amplitude increased with excited current. The simulated results don’t have hysteresis characteristics since it is a static electromagnetic simulation. And experimental curves show slight hysteresis, which are mainly due to magnetic hysteresis loops of soft magnetic materials and each static and dynamic frictions existing in the test rig. The maximum static torque reaches about 0.042N·m and the experimental frequency width can meet requirements of 2D proportional and directional valves. Therefore the proposed torque motor is appropriate to be an electromechanical converter of such applications. If proper heat treatment can be performed, the static and dynamic characteristics of torque motor will be further improved.