The storage tank of molecular sieve filling machine is located on the top of the equipment, which is an atmospheric tank with liquid level sensor and feed solenoid valve. The liquid material sent by the previous process enters the tank through the solenoid valve. When the appropriate liquid level is reached, the liquid level sensor will send a signal to close / stop the feeding; when the material surface drops to the specified position, it will automatically open. Feed in solenoid valve. In the lower part of the storage tank, the outlet is connected with the suction pipe of the filling host through a pipe. When the host is working, the liquid in the storage tank is sucked into the piston cylinder, and then injected into the bottle through the nozzle.