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Electric High Pressure Hydraulic Diaphragm Dosing Metering Pump. Corrosion Resistant Design: Suitable for conveying general corrosive or poisonous media. Low Noise Operation: Reliable double cam structure ensures low noise in severe conditions. Leak Proof Sealing: Adopts graphite fiber seal for long service life and leak proof performance. Flexible Control Mode: Accepts 4-20 mA analog signals for external control and stroke speed regulation. High Volumetric Efficiency: Plunger acts directly on compression medium for optimized efficiency. Compact and Strong: Small size pump head with strong and compact design.