The necessary components of the metering pump is based on the metering pump system equipment or auxiliary equipment. Metering pump parts can effectively improve the measurement accuracy of metering pumps, metering pumps to improve the working environment, thereby extending the life of metering pumps. The general configuration of the metering pump is as follows: Safety valve -------- Pressure relief valve to protect the system and the safety of parts and equipment in each part of the pipeline. Back pressure valve --------- Holding pressure, voltage, back pressure to prevent siphon phenomenon, to provide a stable pressure environment, improve the metering pump metering accuracy. Pulse Buffers --------- Buffered pulses absorb vibration energy and deliver liquid smoothly. Stirrer ----------- mixing, mixing, reaction, heat transfer and other effects. Injection valve ---------- One-way injection, anti-reflux, a certain pressure back pressure, improve measurement accuracy. Check valve --------- dosing device liquid one-way flow. Bottom valve filter ------- as the end of the suction tube filter. Y-type filter -------- import pipeline of pollution, solid particles of the filter. Flowmeter -------- Intuitive, easy to read traffic. Level gauge -------- container height of the liquid position, read the solution volume. Mirror -------- pipe, the liquid flow within the container. Flow calibration tube ----------- Accurate calibration of metering pump flow. Diaphragm pressure gauge ------------ strong corrosive liquid piping system pressure measurement and read.