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Zhejiang Jiujiang Pump Industry Co., Ltd
ZXLP stainless steel direct coupled self-priming centrifugal pump
NegotiableUpdate on 03/28
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Overview
The ZXLP stainless steel direct coupled self-priming centrifugal pump is a structurally novel product developed by our company based on relevant domestic technical data after digestion, absorption, and improvement.
Product Details
1、 Overview of ZXLP stainless steel direct coupled self-priming centrifugal pump:
ZXL type direct coupled self-priming centrifugal pumpThis is a structurally novel product developed by our company based on relevant domestic technical data that has been digested, absorbed, and improved.
2、 ZXLP stainless steel direct coupled self-priming centrifugal pump features:
1. Compact structure. This series of self-priming pumps has a horizontal structure, integrated pump and machine, beautiful appearance, and occupies less space. Compared with ordinary clean water self-priming pumps, it occupies 30% less space. If an IP54 outdoor motor is used, there is no need for a pump room and it can be placed outdoors for use.
2. Smooth operation, low noise, and high concentricity of components. The motor and pump are directly connected, simplifying the intermediate structure and increasing the smoothness of operation. The impeller has excellent dynamic and static balance, operates without vibration, has low noise, extends the service life of bearings, and improves the operating environment.
3. The shaft seal adopts high-quality mechanical seals, and the dynamic and static rings are made of hard alloy, which is wear-resistant, leak free, and has a long service life.
4. Adopting advanced self-priming pump hydraulic model, it has the characteristics of high efficiency and good performance.
5. Easy to install, use, and maintain. The discharge pipeline does not require a check valve, and the suction pipeline of the clean water self-priming pump does not require a bottom valve, thus simplifying the pipeline system and improving working conditions.
6. Unique structure and good self-priming performance, only a certain amount of liquid needs to be stored in the pump body before operation.
3、 ZXLP stainless steel direct coupled self-priming centrifugal pump Application:
ZXL direct coupled self-priming centrifugal pumpSuitable for industrial and urban water supply and drainage, environmental protection, construction, fire protection, chemical, pharmaceutical, dyeing, printing and dyeing, brewing, electricity, electroplating, papermaking, industrial and mining flushing, equipment cooling, etc. The temperature of the medium used should not exceed 80 ℃, the viscosity should be ≤ 100 cP, and the solid content should be below 30%.
4、 ZXLP stainless steel direct coupled self-priming centrifugal pump usage conditions:
1Direct coupled self-priming centrifugal pumpThe ambient temperature is ≤ 40 ℃, the altitude is ≤ 1000m, the relative humidity is ≤ 95%, the medium temperature is ≤ 80 ℃, and it is required to reach 200 ℃.
2Direct connection clean water self-priming pumpThe self-priming height should not exceed the specified value of 5-6.5 meters, and the length of the suction pipe should be ≤ 10 meters
5、 ZXLP stainless steel direct coupled self-priming centrifugal pump model meaning:
VIZXLP stainless steel direct coupled self-priming centrifugal pumpWorking Principle:
ZXL direct coupled self-priming centrifugal pumpAdopting an axial return pump structure. The pump body is composed of a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, a gas-liquid separation chamber, etc. After the pump starts normally, the impeller absorbs the liquid stored in the suction chamber and the air in the suction pipeline together, and is completely mixed in the impeller. Under the effect of centrifugal force, the liquid carries gas to the outer edge of the scroll chamber, forming a white foam belt with a certain thickness and a high-speed rotating liquid ring on the outer edge of the impeller. The gas-liquid mixture enters the gas-liquid separation chamber through a diffusion tube. At this point, due to the sudden decrease in flow rate, lighter gases are separated from the mixed gas-liquid mixture, and the gases continue to rise and be discharged through the pump outlet. The degassed liquid returns to the storage chamber and enters the impeller again through the reflux hole, where it mixes with the gas sucked in from the suction pipeline inside the impeller. Under the action of the high-speed rotating impeller, it flows towards the outer edge of the impeller. As this process repeats itself, the air in the suction pipeline continuously decreases until the gas is completely sucked out, completing the self-priming process, and the pump is put into normal operation. Due to its unique exhaust capability, this pump can transport liquids containing gas without the need for a bottom valve.
7ZXLP stainless steel direct coupled self-priming centrifugal pumpStructural diagram and technical parameters:
8ZXLP stainless steel direct coupled self-priming centrifugal pumpPerformance parameters:
9ZXLP stainless steel direct coupled self-priming centrifugal pumpMalfunctions and troubleshooting：
9ZXLP stainless steel direct coupled self-priming centrifugal pumpInstallation and maintenance:
1ZXLP stainless steel direct coupled self-priming centrifugal pumpInstallation of
(1. Pump 2. Pressure gauge 3. Outlet vertical pipe 4. Suction hard throat pipe 5. Elbow 6. Flow control valve 7. Outlet pipeline 8. Liquid filling plug 9. Vacuum gauge)
1. When the pump and motor are directly connected for transmission, attention should be paid to the coaxiality of the pump shaft and the output of the motor; The accuracy of pump installation is crucial for the smooth operation of the pump
Sex and service life have a significant impact, so careful installation and calibration are necessary.
2. The pump coupling must be securely fastened with screws and nuts to prevent loosening, otherwise it may cause impeller movement and mechanical failure.
3. In order to maintain a certain amount of stored liquid in the pump body, achieve good self-priming ability, and prevent dry friction of mechanical seals, it is necessary to make the pump
The inlet is higher than the centerline of the pump shaft.
4. The installation of the suction pipeline should note:
a. The installation height of the suction port should not exceed 5 meters. When conditions permit, the installation height of the suction port should be as low as possible below the lowest water storage level of the pool, and the length of the suction pipe should be shortened as much as possible, with fewer bends installed. This is beneficial for shortening the self-priming time and improving self-priming function.
b. Valves, flanges, etc. in the suction pipeline should be strictly guarded against air leakage or liquid leakage, that is, there should be no air leakage in the suction pipeline.
c. Solid and other debris should be prevented from being sucked into the pump body, and a filter should be installed on the suction pipeline for this purpose. The effective flow area of the filter should be 2-3 times the cross-sectional area of the suction pipe, and the filter should be inspected regularly.
d. The suction and discharge pipelines should have their own supports, and the pump body itself is not allowed to bear the load of the pipelines.
5. When installing the pump, the static grounding resistance of the pump and pipeline should meet its specified requirements.
6. During installation, it is necessary to strictly inspect the pump casing and pipelines for any stones, iron sand, or other debris.
7. Correct the installation clearance and coaxiality of the pump coupling and motor coupling, with a permissible deviation of 0.1 millimeters for different axial degrees. The height difference between the pump shaft and the motor shaft can be adjusted by placing copper or iron pads on the feet.
8. After 3-4 hours of actual operation of the unit, a final inspection should be conducted. If there are no adverse phenomena, it is considered that the installation is done properly. During the trial operation, the temperature of the bearings should be checked, and the temperature of the bearing body should not exceed 70 ℃.
9. The bearing body of the pump is equipped with a cooling chamber device and a cooling water joint for fitting rubber or plastic pipes with an inner hole of Φ 12. The thread size is M12 × 1.75.
10. If a one-way valve is installed on the outlet pipeline of the pump and the pump cannot smoothly discharge gas during the self-priming process, an exhaust pipe and valve should be added at the outlet of the pump.
IIZXLP stainless steel direct coupled self-priming centrifugal pumpThe use of
（1） Preparation and inspection work before starting:
1. This series of self-priming pumps is lubricated with high-quality calcium based butter and No. 10 engine oil according to the working and operating conditions of the pump. If a pump lubricated with butter is used, butter should be regularly added to the bearing box A pump lubricated with engine oil If the oil level is insufficient, add enough.
2. Check if the liquid storage inside the pump casing is higher than the upper edge of the impeller If it is insufficient The storage fluid can be directly injected into the pump body from the filling port on the pump casing. It should not be started and operated when the storage fluid is insufficient, otherwise the pump cannot work normally and the mechanical seal may be damaged.
3. Check whether the rotating parts of the pump are stuck or subject to magnetic impact.
4. Check if there is any looseness in the nuts of the pump body feet and various connections.
5. Check the coaxiality and parallelism between the pump shaft and the motor shaft.
6. Check if there is any air leakage in the inlet pipeline, and if there is any, try to eliminate it.
7. Open the valve of the suction pipeline Slightly open (do not fully open) the outlet control valve.
（2） Starting and operation:
1. Tap the self-priming pump and pay attention to whether the direction of the pump shaft is correct.
2. Pay attention to any abnormal sounds and vibrations during rotation.
3. Pay attention to the readings of the pressure gauge and vacuum gauge After starting, when the readings of the pressure gauge and vacuum gauge fluctuate for a period of time and indicate stability, it indicates that the pump has been filled with liquid and entered normal infusion operation.
4. During the self suction process before the pump enters normal infusion operation Special attention should be paid to the increase in water temperature inside the pump. If this process is too long and the water temperature inside the pump is too high, stop the pump and check the cause.
If the liquid temperature inside the pump is too high and causes difficulty in self-priming So we can temporarily shut down Use the liquid in the discharge pipeline to flow back into the pump or directly replenish the liquid into the pump through the storage port on the pump body Cool down the liquid inside the pump Then start it up.
6. If the pump experiences strong vibration and exposure during operation It is possible that cavitation occurs in the pump, and there are two reasons for cavitation: one is excessive flow velocity in the inlet pipe The second issue is that the suction distance is too high. When the flow rate is too high, the outlet control valve can be adjusted Raise the pressure gauge reading. If there is a blockage in the inlet pipeline, it should be promptly eliminated. If the suction stroke is too high, the installation height of the pump can be appropriately reduced.
7. The pump stopped for some reason during operation When it needs to be restarted The outlet control valve should be slightly open (not fully closed) to facilitate the discharge of gas from the outlet during the self-priming process and ensure that the pump starts under lighter loads.
8. Pay attention to checking whether there is any leakage in the pipeline system.
（3） Stop the pump:
Firstly, the gate valve on the discharge pipeline must be closed.
2. Stop the pump from rotating.
During the cold season, the liquid stored in the pump body and the water in the cooling chamber of the bearing body should be emptied to prevent freezing and cracking of the components.
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