Liquid End Features ·LE material:PP;PVC;PVDF;316SS ·Diaphragm material:PTFE ·Ball check material:Glass;Ceramic;316SS ·Special designec valve seat to ensure no leakage wether the pump running or stopping ·Variety of critical applications of pump head configuration: High viscosity,pulp,concentrated sulfuric acid,sodium hypochlorite,etc. ·Self-cleaning check valve structure 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. Adjustment Options Manual Adjustment:wethwer the pump running or stopped ·Minimum adjustment scale is 1% Electric Stroke Controlller:external control signal adjust stroke length ·Power Supply:220V-50Hz,1 phase ·Input Signal:4-20mA ·Output Signal:4-20mA/1-5V feedback signal. Frequency Inverter:external control signal,adjust stroke speed ·220V-50Hz,1phase/380V-50Hz,3phase ·Input Signal:4-20mA