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Explosion Protected Electro-Hydraulic Thrusters
Explosion protected electro-hydraulic thruster is a kind of drive control system, which very compact in structure, integrates electrical motor, centrifugal pump and oil cylinder. It is extensively used as drivemechanism of various drum and disc brakes, drive control of various industrial valves, penstock,directional pendulum and steering (<90°) mechanism, and as drive control of holing devicesas well.

The performances of explosion proof accord with the regulations of GB3836.2 provision"d" concerning explosion proof electrical appliances to be used in the explosive environment.The explosion proof marks are "ExdⅠ","ExdⅡBT4".The quality certificate CNEx03 127-134.

Design features:
■Electrical motor is of non-under-oil structure,F grade insulation,
good heat enderance and long life.
■Both electrical motor shaft and thruster are hard chrome plated on the surface making life of sealing parts greatly prolonged.
■Balancing air house is arranged at one side of oil cylinder casing. Thruster can be installed at any direction within range of 0~180 °, thus enlarging its scope of usage.
■All sealing parts and bearing are of world known products.The sealing is reliable and performance life is long.

Additional Equipment:
    All thrusters can realize some additional functions after equipped with additional devices.
●Up limit switch can indicate such information as whether brake is open, whether the thruster is in theright position.
●Down limit switch can indicate whether the brake is properly close,whether the thruster return to right position. Upper and lower limit switchs can be arranged simultaneously.
●Add built-in brake spring or release spring (only for short stroke thruster), release spring can be decided by customers, but the force of built-in spring can not be exceeded (see parameter tables).
●Delay valve of lift and delay valve of fall or delay of lift/fall valves can infinitely delay lift and fall. Delay range is from rated action time to 30 seconds. Specific delay can be set as  per customer's requirement.