1 When the user chooses the dosing device, first determine the selection specifications (including metering pump parameters, mixing tank volume, solution tank volume and site conditions) according to the volume of solution required by the system , and then determine the dosing method according to the dosing situation (generally Adopt the method of " one open, one preparation " or one additional preparation); 2 According to the needs, select the materials (stainless steel, carbon steel, non-metallic materials ) and metering pump models ( diaphragm pump , plunger pump) ) Or the parameters (name, concentration, temperature, density, viscosity, corrosiveness, etc.) of the added agent; 3 The ordering system is a few boxes and several pumps; 4 Is the metering pump a plunger pump or a diaphragm pump; 5 The flow and pressure of the metering pump ; 6 Is the system controlled manually or automatically; 7 Other special requirements for the dosing device.

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