SFSY semi-frame pressurized oil filter; It is specially designed for power plants, substation stations, power supply stations, oil depots and related factories and enterprises to filter various insulating oils such as transformer oil, capacitor oil, hydraulic oil and lubricating oil to remove impurities and moisture and improve various performances of the oil. For oil with higher viscosity, it can also be filtered by heating to reduce its viscosity, it has good purification effect, saves cost, protects environment and is an ideal oil-saving recovery equipment. It is especially suitable for purification of lubricating and cooling systems of large imported equipment, so it can ensure the normal operation of the equipment and prolong the replacement period of expensive imported oil in the machine.