DuraForce HMV Variable Displacement Piston Motors

HMV Series piston motors deliver high efficiency, precision control and durability over the course of many years of reliable service. They are high-pressure regulated and shift to minimum displacement Vmin at system pressures below the regulation begin point. When the defined high pressure regulation set point is reached, the motor smoothly increases displacement to match the torque required by the system.

H1 and E1 Stepless Variable Control

Motors with stepless variable control are suitable for open and closed loop circuit. Without control signal they shift to maximum displacement Vmax. Displacement control is hydraulic or via an electric proportional control signal. Servo pressure supply is optionally internal or external.

H2 and E2 Two Position

Two Position Features Two position motors are suitable for open and closed loop operation. Without control signal they are set to maximum displacement Vmax. Adjustment between Vmin and Vmax is smooth and with short response time. The required switching signal can optionally be hydraulic or electric, the servo pressure supply internal or external.

EH1P Stepless with Pressure Override

This motor is used primarily for closed loop operation together with speed-dependent hydraulic pump, type HPV CA. Alternatively, with hydraulically or electro-hydraulically pilot-operated drives for which a high pressure regulating function is also required. Without control signal the motor shifts to maximum displacement Vmax. Stepless variable control to lower displacement is hydraulic, with control pressure generated by the speed dependent pump. The motor is also equipped with a system pressure override which, at a predefined setting, automatically increases its displacement in response to system related torque demand.

D Double Motor

The double motor consists of two Danfoss variable motors arranged back-to-back. In addition to a wide torque/ speed conversion range it offers the option of direct installation in the drive line, since one or two shaft ends are optionally available for torque output. Noise emission and fuel consumption are reduced because no transfer gearbox is required. At the same time the overall efficiency increases. The performance comparison diagram shows the required drive capacity for different design variants at four operating points.

HMV Tandem Motor

The Tandem motor consist of two HMV, arranged face-to back and connected with a Tandem flange. Alike the double motor, the Tandem motor can also be integrated directly into the driveline and is available with one or two shaft ends.

Motor Equipment - Cross Over Relief Valve Block

The cross over relief valve block offers additional high pressure protection for the motors. It is mounted to the radial high pressure ports. As well as this protective function, the block offers tee connectors for the high pressure connections in order to connect an additional motor to the system without the need for long hoses.