This Control valve DY-M is mainly used for temperature control of cooling water fed to large-size diesel engine as it has larger capacity than the model DY-T. The construction is simple with a small number of components. It's a rotary plug type 3-way valve where the flow channel is altered by turning the valve plug.
For handling corrosive fluids like sea water, it is possible to apply corrosion-resistant rubber lining or other coating onto the inner wall of the body. As the turning torque of the valve stem is small also a small size actuator can be used and this actuator is triggered by the NSTM732 pneumatic temperature controller.