Proseries-M® MD-3 Hybrid Diaphragm Chemical Metering Pump is now equipped with sonic welded manifolds for added durability and protection from chemical leaks. The carefully engineered MD-3 provides precision chemical metering for treatment of municipal water and wastewater. MD-3 is NSF 61, CE, ETL and NEMA 4X certified. MD-3 has 2000:1 turndown, and provides smooth chemical dosing with no pulsation dampener. With 380 strokes per minute, MD-3 provides steady flow. Output rates to: 58 GPH (220 LPH) and pressures to 145 PSI. Long service life at high pressures with no pressure regulator needed. MD-3 is 50% more energy efficient than similar units. MD-3 is equipped with conveniently built-in controls.