The use and precautions of zirconia ceramic piston pump
The piston type ceramic piston pump is a reciprocating positive displacement pump, which can be combined into a double pump, double cylinder or multiple pump and multiple cylinders. Ceramic piston pumps are widely used in production and scientific research departments in petrochemical industry, thermal power generation, sewage treatment, tap water treatment, food industry, military industry and other fields.
The use and precautions of ceramic piston pumps.
1. The anti-corrosion grease on the pump should be washed before the new pump is used, and the bolts at each connection should be checked to see if they are tightened, and no loosening is allowed.
2. Inject mechanical oil into the gearbox and gearbox, and the oil quantity is controlled at the center line of the oil standard. Selection of mechanical oil: N46 in summer, N32 in winter. The oil cup is filled with N20 mechanical oil.
3. Move the metering pump with a hand disc to make the plunger reciprocate 1 2 maximum strokes. There must be no jamming. The zero of the pump stroke is then corresponded to the zero of the gauge to prevent the drift of the gauge pointer during transport.
4. Open the valve on the inlet and outlet pipelines, start the motor, check the motor line, and make the pump rotate according to the specified rotation direction. The maximum stroke is selected to drain the liquid, so that the air in the liquid cylinder is completely discharged.
5. Rotate the adjustment handle to calibrate the displacement of the pump. After adjusting to the set displacement, the locking screw of the adjustment handle should be tightened to avoid loosening the impact and causing the flow rate to change.
6. After the pump runs normally under normal pressure, the discharge pressure is gradually increased to the rated value.
7. Check the leakage at the plunger packing, if the leakage exceeds 10 drops per minute, the packing compression nut should be tightened appropriately, and the compression force should not jam the plunger and not leak.
8. Check the temperature rise. The allowable temperature rise of the motor is 70, the temperature of the lubricating oil in the gearbox should not exceed 65, and the temperature of the packing box should not exceed 70. If the temperature rise is too high, the machine should be stopped for inspection, and the machine should be started after the fault is eliminated.
9. After the pump is started, the operation should be stable, except for the rhythmic one-way valve beating sound, there can be no special noise, and it can not work with illness.
10. There can be no greater than 0 in the liquid conveyed by the pump1mm solid particles or impurities, otherwise it will directly affect the discharge accuracy of the pump, it is recommended to install a filter on the inlet line of the pump.
11. When discharging some liquids that are easy to gasify, a gas-liquid separation device should be installed on the outlet pipeline.
In addition to the above matters, ceramic piston pumps should also pay attention to:
1. Open the oil cap of the oil cup before turning on the machine and check whether the oil cup is full of oil. After starting, use the manual pressure to release the refill valve stem several times to fill the pump chamber with oil, and at the same time discharge the air in the pump chamber until the bubbles are no longer rising, and the pump can start to work normally.
2. Before leaving the factory, the metering pump has tested the technical parameters, and has carefully adjusted the working status of the two valve groups.
3. When replacing the wearing parts or overhauling, it is necessary to refill the hydraulic oil in the oil chamber and discharge the clean air, at this time, please follow the following steps: install the pump head, unscrew the entire oil cup, move the metering pump with a hand plate, make the plunger move slowly back and forth, add hydraulic oil through the small hole on the wrench, until it is filled and no bubbles come out, then install the oil cup, fill the oil cup with oil, start the pump, and then press the valve stem several times to drain the residual air in the oil chamber, and the pump can return to normal state.
4. When the ceramic metering pump is installed and used, the installation valve must be installed, and the opening pressure value of the safety valve is 1 of the rated pressure of the pump1 times. The normal use pressure must not exceed the rated pressure of the pump.
5. If you need to clean the check valve on the liquid cylinder body, please refer to the diagram of the pump head and plunger sealing device of the metering pump, and follow the steps below: aAfter removing the check valve, do not touch the seat plane of the check valve with a hard object or tweezers, etc., and do not damage the valve ball. b.The cleaning solution can be clean ethanol or kerosene, and the cleaning tools should be cleaned with a soft brush. c.Be very careful when installing, and note that all seats should be used with the operating surface upwards and the tapered mouth downwards, and no gaskets should be missed.
6. The lubricating oil replacement cycle is as follows: replace once after one month of use, replace every three months between the second month and the seventh month, and replace it every six months after seven months.
7. When the pump is out of use, please close the valve of the inlet and outlet pipeline, if it is out of use for a long time, the residual medium in the liquid cylinder should be emptied and rinsed, and then the surface of the pump body should be coated with anti-corrosion oil, stored in a dry and non-corrosive gas place, and covered with a cover.
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