No need for irrigation: high suction, high head, and high outlet pressure Good passability: spacious flow, allowing for the passage of large particles; When pumping mud and impurities, the wear on the pump is minimal Stepless adjustment: The head and flow can be infinitely adjusted through the opening of the air valve. No leakage, safe and environmentally friendly: no rotating parts and shaft seals; The diaphragm isolates the conveying medium from the moving parts and will not leak outwards; When pumping volatile or corrosive media, it will not cause environmental pollution and harm Explosion proof safety: does not use electricity, suitable for flammable and explosive environments Welcome and I wish you a happy life, my friend., Manufacturer: JOLIANE