NEWTRY Water Powered Flow Dosing Pump Hydraulic Chemical Fertilizer Injector Proportioning Dispenser Liquid Diluent Doser Proportioner for Drip Irrigation Mixer Hose Livestock Farm (0.4% -4%)[Working Principle]: With flowing pressure water as power, the loss of water pressure is small, and no other power facilities are needed. In case of emergency, it can quickly dispense drugs and save a lot of manpower. [Important Parameters]: 0. 4%~4%1: 25~1: 250; Working pressure: 0. 3~6 bar ( about 4. 35~87 psi); inlet and outlet diameter: 3 4(25mm), Flow range: 20~ 2500L h (4. 4 ~660. 43 gallons h) [Accurate and Effective]: Adopt Reciprocating