High Power Density for Mobile Machinery

TPV-closed-circuit axial piston pumps, from HANSA-TMP, are intended for mobile applications. Featuring high power density, compact design, electronic controls and on-board sensors, they are used on sweepers and mini dumpers, remote controlled mowers, front loaders, compact loaders and mini forwarders, just to name of few, providing a solution that marries hydraulics with electronics.

For over 35 years, HANSA-TMP has been designing and manufacturing hydraulic components and systems for mobile, industrial, wind and marine applications. It is the ideal partner for projects that require the integration of hydraulics with electronics. The Engineering Division supports the company’s production; a team of specialists analyse customers’ technical and system requirements to identify the best possible solution. The team supports customers with the sizing of the best possible complete electro-hydraulic system and work out pre-assembled solutions consisting of integrations of manufacturing products and other hydraulic components, distributed by the company.

Hydrostatic transmissions are the heart of the company’s production

HANSA-TMP’s core business is the design and production of 100% Made in Italy hydrostatic transmissions and, namely, the TPV-series closed-circuit axial piston pumps from 7 to 110 cm3/rev. In relation to the displacement and the pressure supported, applications include mobile machines and systems such as sweepers and mini dumpers, remote controlled mowers, front loaders, compact loaders and mini forwarders.
The TPV, the so-called HANSA-TMP manufacturing pumps, feature high power density, compact design, electronic controls and on-board sensors.
The back-to-back configuration, that is the sharing of the distributor group between the two stages of the pump, implemented on the TPV 1200 and TPV 1500, permits compact units, allowing a significant reduction of the longitudinal length compared to the competitors (about 60 mm).
Through this configuration it is possible to obtain special versions for each unit, customized or prototypes in a short time. The company functionally tests 100% of the units produced and there is a full traceability of the serial numbers and internal components.

Several control options available for customers

HANSA-TMP manufacturing pumps are equipped with various controls. In relation to the project, the HANSA-TMP Application Engineers suggest the best model to be adopted by supporting the customer in every aspect of the system. Through the hydraulic control (SHI), the regulation of the pump takes place by directly pressurizing one of the two chambers of the actuator. It is connected to the swash plate which provides continuous variation of the displacement. A compact version (SHIC) is also available with frontal rather than top connections. With the proportional electric control (SEI), the regulation of the pump takes place through electrically controlled proportional valves, with which one of the two chambers of the servo command is pressurized. The drive flow is taken from the feed pump. On the other hand, the feedback control makes the displacement adjustment control insensitive to pressure variations due to changes in the external load.
It is powered and moved by a spool pilot, which in turn can be controlled mechanically (SMIX), hydraulically (SHIX), or electrically (SEIX). The electronic automotive control is available too.

A wide range of sensors and accessories

The TPV line can be equipped with a wide variety of sensors, such as pressure (PRS), speed (REV.S) and angle (RS) sensors. In addition, various options and accessories complete the range. The By-Pass valve (SB) connects the high and low pressure branches to short-circuit the pump; the flushing valve (VS) has the task of reconditioning and refrigerating the fluid that passes through the closed circuit; the Cut-Off valve (CO), on the other hand, limits the maximum pressure of the closed circuit by modulating the displacement and is calibrated on the basis of the maximum pressure on the high pressure line (about 30 bar lower than the pressure of the relief valve). The Man On Board (MOB) valve is a safety system capable of stopping the machine in the presence of an alarm or dangerous condition; the predisposition for the remote filter (FR) is useful when the pump is in difficult access positions and it is not possible to get the filter for maintenance and, finally, the pressure filter of the boost pump (FLT) has the function of cleaning fluid enters the closed circuit and is available with and without clogging indicator.