Volumetric dispensing system, the liquid flow is controlled by the speed of the glue valve. It can be used for silicone, acrylic and UV acrylic dispensing. Applications include point, line or potting dispensing. The integrated Luer Lock adapter (patent) with O-ring ensures the sealing of the equipment when dispensing, and has a return function to ensure that the glue at the tip of the needle is cleanly cut off, and there is no problem of leakage and clearing.