Positive Displacement Metering Pump widely used in water treatment process such asmunicipal tap water,swimming pools, urban sewage, industrial effluent and kinds of chemical dosing,etc. Drive Unit Features ·Variable eccentric adjustment stroke length to smooth pulsation impact of flow rate. ·Robust structure design suitable for pulse impact and harsh operating conditions ·Sliding bearing and high intensity wearable worm gear ensure stable long-term operation. "Environmental protection system is a difficult problem, because any industry can use environmental protection system. Enterprises and employees may not be aware of which applications use these components. But unless you use these environmentally friendly devices every day, it's easy to ignore them and their uses.