Return & Suction Filters for Hydrostatic Transmission (KTS/FTA/FTB) available from the Sofima/UFI range which are designed to work in hydraulic systems combined with hydrostatic transmission when the return flow is higher than the flow of the boost pump in any operating condition. The oil from the return line of the system is filtered from the inside to the outside of the filter element and goes to the suction of the boost pump with a 50 kPa (0.5 bar) pressurization with the exceeding flow rate going into the reservoir. A flow rate 50% higher that the flow required by the boost pump is recommended in normal operating conditions.
They are available with internal or external bypass and one filter can be used for two functions filtering the oil returning from the hydraulic system and feeding the boost pump with cleanest oil.
Pressurization allows absolute filtration on the suction of the boost pump with no risk of cavitation and the filter element works from inside to outside to allow retained contamination to be completely removed when replacing the element.
This range of filters are not a stock item and are factory ordered, if you need any technical information such as dimensions then please view the PDF datasheet at the bottom of this page, alternatively you can telephone our sales office on 01706 378625 or contact us online should you need any further help choosing the correct parts for your application or if you have any special requirements.