Filler in the precision of filling the need to adjust the valve spring pressure size should be measured by the test filling and operator experience to determine. The switch speed of the heavy valve mainly adjusts the spring pressure of the valve, the spring pressure increases, the switch speed of the valve is accelerated. Conversely, the speed slows down. The production error is mainly determined by the filling capacity, filling speed and the switch speed of the upper and lower valves. The switch speed of the upper and lower valves is related to the viscosity of the product, the greater the viscosity, the slower the valve switch speed. The use of filler in peacetime will directly affect the performance of the filling machine, the correct use of filler is very important.