BORUI designs and manufactures a wide range of floor springs for commercial doors. Using high-grade materials and automatic professional equipments, through the advanced and strict casting process, the precision of each product is guaranteed. Automatic negative ion adsorption anti-oxidation spraying on the surface increases the anti-rust ability of the floor spring. The internal transmission parts of our floor springs are made of high-quality special steel, processed by high-precision CNC equipment, and finally heat treated to improve the overall performance.The low temperature antifreeze hydraulic oil ensures that the closing speed will not be affected in the subzero low temperature weather. Independent two-stage door closing speed adjustable design can meet various door closing speed needs and various specific use environments. The unique safety valve oil circuit design can prevent the external force from causing fatal damage to the floor spring when the door is closed. The service life can reach more than 500,000 times. BORUI Floor Spring Series are suitable for glass doors and wooden doors in various public places.