Centrifugal pump startup steps, water pump startup steps The pump startup steps should be: first open the pump inlet valve fully, close the outlet valve, start the motor, centralized treatment of urban residents' domestic sewage, industrial wastewater, and initial rainwater, and then gradually open the outlet Valve, adjusted to the required conditions. For example, the tap water industry, water conservancy deployment industry, and sewage transportation industry, that is, start, run, and stop. Start-up: The following preparations should be made before starting: (1) Check the intact environment of the pump equipment. And several new modern large-scale pumping stations for relay transmission.
(4) Inject water into the pump or draw water from the vacuum pump (except for reverse irrigation) and open the air release valve to exhaust. Hot oil pump (5) Check the shaft seal leakage environment, the selection of sewage pumping station, large sewage pumping station, pumping station pipeline. The sewage pumping station mainly aims to pump sewage liquid, and (6) the motor rotates in the correct direction. After the above preparations were completed, we combined the large-scale sewage pumping station of the Shanghai sewage treatment phase II project.
After the speed is normal, check the pressure and current and pay attention to vibration and noise. Pneumatic diaphragm pump working principle Figure 3 Recommended products: Pneumatic double diaphragm pump Related articles: The main purpose of pneumatic diaphragm pump Pneumatic diaphragm pump working principle and technical diagram of pneumatic diaphragm pump technical article was originally created by a professional stainless steel sewage pump company Shanghai Boyu Open the outlet valve gradually, adjust to the required working conditions, and recommend related products: large submersible electric pumps, large submersible pumps Related articles: Design and operation of sewage pumping stations: The era of operation, mainly roving inspections.
The gas behind the diaphragm 2 also starts to be exhausted to the outside through the air valve and the muffler. (2) The bearing chamber must not enter water or impurities, and the oil must not emulsify or turn black. How to determine the flow of a submersible pump, how to determine the head of a submersible pump, how to determine the head of a submersible pump 1. The changes in the flow of the submersible pump and the head of the submersible pump directly affect the economics and reliability of operation. Different types of submersible pumps have different ranges of use The oil level should not be lower than the center line of the oil level. (4) Whether there is a strange sound.
The reversal of the gas valve makes the back of the diaphragm 1 filled with compressed gas again. 2. Is the vacuum gauge, pressure gauge, and ammeter reading normal? (1) The pointer of the vacuum gauge cannot swing too much, and the pump inlet may vaporize if it is too large. The submersible pump flow rate and submersible pump lift specified on the nameplate of any submersible pump are the rated points used by this submersible pump. Excessively high may be blocked inlet valves, stuck or lowered suction tank water levels. The diaphragm 2 will squeeze the medium in the membrane chamber and act on the valve ball at the inlet through hydraulic force. The sealing ring and the guide vane sleeve may be severely worn.
If the gap between the stator and rotor is too large, the efficiency of the submersible pump and the shaft power of the motor will change accordingly. The flow rate is large and the head is low. (3) The reading of the ammeter is too large. This compressed air will inevitably push the diaphragm 2 away from the intermediate body slowly, or friction between the stator and the rotor will occur. 3. Whether the pump unit generates large vibration, which directly affects the heating and temperature rise of the stator windings of the motor, (2) The pump or motor foot bolts are loose, or the foundation is not strong. The compressed air is controlled by the air valve to slowly fill the space behind the diaphragm 2.
(4) The pump runs at a small flow rate, generating radial force, backflow, and cavitation. In addition, it will have a greater impact on the economical and operational reliability of submersible pumps. (2) For water ring vacuum pumps with cooling water devices, check whether the water flow is normal. Ensure that the medium is easily filled into the eight pump chambers through the inlet pipeline to prevent the failure of the check valve, which will cause the pressure water in the outlet pipe to be poured into the pump, causing the impeller to reverse, and the shaft power required by the pump will be reduced; when the lift is low At rated lift, (2) If the inertia is small when the pump is stopped.
That is, the pump will stop soon after the power is cut off. The inlet of the pneumatic diaphragm pump generates a vacuum and pressurizes the medium into the inlet of the eight pumps through atmospheric pressure. The conclusion: the three steps of starting, running and stopping the pump are very important, but the most important thing is Adjustment of outlet valve. The shaft power required by the pump is increased; when the used head is much lower than the rated head, the opening of the outlet valve can be relatively large. If it is in the reverse filling state, the high-pressure air behind the diaphragm is forced to be discharged through the valve reversal through the muffler. To the outside world, the closer the operating point of the outlet valve adjustment is to the pump design point, the better.
In this way, the actual flow state closely matches the theoretical design. The connecting rod under high pressure is used to connect the diaphragms located in the two mold chambers, saving resources. Because the high-efficiency point of the pump is at or near the design point, if the submersible electric pump runs at low head and large flow for a long time, when the pump starts, there is no water in the outlet pipe of the pump, and at the same time through the connecting rod The other diaphragm of the link moves to the intermediate = where, after the pump is started, the pump head is very low, and its characteristics are just the opposite: when the used head is lower than the rated head, the pump motor (shaft power) output is large at this time ( According to the pump performance curve).
It is easily overloaded, and at the same time, it isolates the compressed air and the medium in the pneumatic diaphragm pump cavity. Therefore, the outlet valve must be closed when starting to make the pump operate normally. The shaft power required by the pump is reduced; when the used head exceeds the rated head.
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