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SPG type ultra-low noise, completely leak free pipeline shielded pump
The SPG series ultra-low noise completely leak free pipeline shielded pump product overview is that our company adopts Japanese technology and absorbs
Product details
product overview
Our company has adopted Japanese technology and absorbed advanced technology from international shielding pump design and manufacturing. After digestion and innovation by our technical personnel, we have launched a new second-generation shielding pump product. This product improves the electromagnetic core technology on the original basis, enhances the fluid motion state, improves pump efficiency, and takes the comprehensive performance indicators to a higher level, making the product more ideal.
SPG shielded pump is a pump product with an integrated structure of electric motor and water pump. The pump chamber and motor form a sealed whole, eliminating mechanical seals and solving the problem of liquid leakage caused by seal damage. It ensures that the liquid medium does not leak, which is called completely leak free. Removing the rolling bearings and using impregnated resin graphite bearings, the friction coefficient is low and the bearings are lubricated using the fluid medium they transport. Make the whole machine operate with ultra-low noise - this is called low noise.
The product is widely used in petroleum, chemical, pharmaceutical, textile, nuclear power, military, shipbuilding and urban water supply, fire boosting, high-rise building boosting water supply, garden sprinkler irrigation, HVAC refrigeration and other cold and warm water circulation boosting. Especially in places that require vibration and noise, such as pump rooms in key projects, central air conditioning, and research institutions and hospitals. Especially suitable for transporting liquids that are harmful and unsafe to the human body and the environment, or valuable liquids.
The SPG type shielded pump can play an important role in more projects, and its advantages such as bottom failure, safety and environmental protection, and optimal maintenance cost have won the welcome and recognition of a large number of users, while also enhancing the demand for high-quality water pumps in the Chinese market.
1. The pump is a vertical structure with the same inlet and outlet diameters and located on the same centerline. It can be installed in pipelines like a valve, with a compact and beautiful appearance, small footprint, and low construction investment. If a protective cover is added, it can be used outdoors.
2. The impeller is directly installed on the extended shaft of the motor, with a short axial dimension and compact structure. The pump and motor bearings are reasonably configured, which can effectively balance the radial and axial loads generated by the pump operation, ensuring smooth operation, low vibration, and low noise of the pump.
3. The shaft seal adopts mechanical seal or a combination of mechanical seals, using imported titanium alloy sealing rings, medium-sized high-temperature resistant mechanical seals, and hard alloy materials for wear-resistant seals, which can effectively extend the service life of mechanical seals.
4. Easy installation and maintenance, no need to disassemble the pipeline system, just remove the pump coupling nut to extract all rotor components.
5. Pumps can be operated in series or parallel according to the requirements of flow rate and head.
6. The outlet of the pump can be installed in several different directions, such as 0 °, 90 °, and 180 °, to meet different connection scenarios.
1. SPG shielded pump is used for conveying clean water and other liquids with physical and chemical properties similar to clean water, suitable for temperatures ranging from -30 ℃ to+90 ℃. Specially suitable for industrial and urban water supply and drainage, fire boosting, high-rise building boosting water supply, garden sprinkler irrigation, long-distance transportation, HVAC refrigeration cycle, bathroom and other cold and warm water circulation boosting and equipment matching.
2. SPG shielded pump is suitable for conveying medium with high temperature, and is suitable for medium temperature of 80-130 ℃. Widely used in industries such as petroleum, chemical, pharmaceutical, textile, hotels, restaurants, and bathrooms.
3. SPGT corrosion-resistant shielded pump can transport solid particles free materials and is suitable for departments such as petroleum, chemical, pharmaceutical, textile, scientific research institutions, and synthetic fibers.
4. SPGB explosion-proof shielded pump is used to deliver explosive and flammable liquids such as liquid ammonia and toluene.
5. SPGTB anti-corrosion and explosion-proof shielded pump is used for transporting flammable, explosive, and corrosive chemical liquids.
2. SPG shielded pump is suitable for conveying medium with high temperature, and is suitable for medium temperature of 80-130 ℃. Widely used in industries such as petroleum, chemical, pharmaceutical, textile, hotels, restaurants, and bathrooms.
3. SPGT corrosion-resistant shielded pump can transport solid particles free materials and is suitable for departments such as petroleum, chemical, pharmaceutical, textile, scientific research institutions, and synthetic fibers.
4. SPGB explosion-proof shielded pump is used to deliver explosive and flammable liquids such as liquid ammonia and toluene.
5. SPGTB anti-corrosion and explosion-proof shielded pump is used for transporting flammable, explosive, and corrosive chemical liquids.
1. SPG shielded pumps can transport flammable and expensive liquids that are harmful to human health, the environment, and equipment, and are prone to leakage, as they can ensure complete non leakage.
2. Not capable of inhaling air, suitable for vacuum systems and conveying liquids that have deteriorated in contact with air.
3. The design without shaft seal replaces the rotating seal with a static seal, solving the serious leakage problem of ordinary pumps at the transmission shaft.
4. Bearings use the conveyed liquid for self lubrication, without the need for lubricating oil, so they do not contaminate the conveyed liquid and eliminate the trouble of regular oil injection.
5. The motor and pump are coaxial, and the impeller diameter of the pump is installed on the motor shaft, forming an absolutely leak proof sealed whole inside the pump.
6. The impeller adopts a water thrust balance design, which allows the rotor to be in a suspended state during operation, reducing the axial wear of the graphite bearing shaft, thereby improving its service life and reducing operating costs.
7. The motor has no cooling fan and the rolling bearings are removed, so the operating noise and vibration are very small.
8. The specification design of the pump outlet flange is the same as that of the standard valve, and it is located on the same centerline with a low center, which is convenient for pipeline layout and more reasonable for pump room design and use.
9. The standardization and categorization of components are high.
10. The junction box adopts a waterproof structure and can be used outdoors.
11. The series or parallel operation mode of the pump can be adjusted according to the requirements of flow rate and head.
12. The pump structure is reasonable, with small volume, light weight, small footprint, stable operation, easy installation, no need for adjustment, and convenient maintenance. Compliant with standards
The SPG type shielded pump basically complies with the national standard GB5662.85 The provisions of JB/T10483-2004 and the International Electrotechnical Commission standard JB/T10391-2002 for standard bricks.
2. Not capable of inhaling air, suitable for vacuum systems and conveying liquids that have deteriorated in contact with air.
3. The design without shaft seal replaces the rotating seal with a static seal, solving the serious leakage problem of ordinary pumps at the transmission shaft.
4. Bearings use the conveyed liquid for self lubrication, without the need for lubricating oil, so they do not contaminate the conveyed liquid and eliminate the trouble of regular oil injection.
5. The motor and pump are coaxial, and the impeller diameter of the pump is installed on the motor shaft, forming an absolutely leak proof sealed whole inside the pump.
6. The impeller adopts a water thrust balance design, which allows the rotor to be in a suspended state during operation, reducing the axial wear of the graphite bearing shaft, thereby improving its service life and reducing operating costs.
7. The motor has no cooling fan and the rolling bearings are removed, so the operating noise and vibration are very small.
8. The specification design of the pump outlet flange is the same as that of the standard valve, and it is located on the same centerline with a low center, which is convenient for pipeline layout and more reasonable for pump room design and use.
9. The standardization and categorization of components are high.
10. The junction box adopts a waterproof structure and can be used outdoors.
11. The series or parallel operation mode of the pump can be adjusted according to the requirements of flow rate and head.
12. The pump structure is reasonable, with small volume, light weight, small footprint, stable operation, easy installation, no need for adjustment, and convenient maintenance. Compliant with standards
The SPG type shielded pump basically complies with the national standard GB5662.85 The provisions of JB/T10483-2004 and the International Electrotechnical Commission standard JB/T10391-2002 for standard bricks.
1. The medium being transported must be soft water, thin, non solidifying, and free of solid particles and fiber fluids.
2. The medium temperature of SPG pump shall not exceed 90 ℃, and the medium temperature of SPG (R) pump shall not exceed 130 ℃.
3. The pressure of the imported system must not be less than 0.05Mpa, and the system pipeline must be filled with liquid to ensure that the top exhaust valve can discharge liquid. If the inlet pressure is higher than 0.15Mpa, it should be specified separately when ordering.
4. The maximum pressure of the SPG shielded pump system is 1.6Mpa, which means that the pressure and head of the water pump are ≤ 1.6Mpa. This can be requested separately when ordering.
5. The rated frequency of the motor is 50Hz, the voltage is 380V, and it adopts full voltage direct starting. The protection level of the electric pump housing is IP54, and the insulation level is F.
6. From the pump shaft end, the electric pump rotates clockwise.
7. Explosion proof type customized according to GB3836.12 and explosion-proof level EXd II BT3 EXd II. BT4 Explosion proof type.
Structural diagram of SPG shielded pump. This pump, also known as a shielded electric pump, is an integrated structure. The whole machine is mainly composed of pump body, impeller, connecting body, graphite bearings, stator, rotor, shielding sleeve, motor housing and other components. The pump is a vertical single-stage centrifugal pump, with the inlet and outlet on the same horizontal axis. The inlet diameter specifications are the same and can be directly installed on any part of the pipeline like a valve. For the convenience of loading and unloading, the footprint is small. The pump is integrated with the motor through a connecting body, and the bearings are made of imported graphite impregnated resin graphite bearings. The stator of the motor is enclosed and isolated with shielding sleeves. The pump has the characteristics of reasonable design and reliable operation. It is equipped with a bottom valve, which can be directly installed on the base or installed with a connecting plate and vibration isolation pad.
1. Before installation, the fasteners of the pump unit should be checked for looseness, and there should be no foreign objects blocking the flow channel of the pump body to prevent damage to the impeller and pump body during the operation of the electric pump.
2. During installation, the weight of the pipeline should not be added to the water pump, and there should be separate supports. Soft joints should be installed at the inlet and outlet of the pump to prevent deformation of the pump's connecting flange and affect its service life.
3. In order to prevent impurities from entering the pump and blocking the flow channel, a filter with a cross-sectional area 3-4 times larger than the suction pipe should be installed in front of the pump inlet.
4. When a pump is used to transport hot water or other high-temperature liquids, in order to prevent the pump from being subjected to thermal deformation of the pipeline, the pump may not be fixed with anchor bolts. When the pipeline system expands and contracts due to heat, the pump and pipeline can move simultaneously.
5. For the convenience and safety of maintenance, a regulating valve is installed on each inlet and outlet pipeline of the pump, and a pressure gauge is installed near the inlet and outlet of the pump to ensure that the pump operates within the rated range, ensuring the normal operation and service life of the pump.
Start, operate, and stop
（1） Start and Run
1. Fill the water and exhaust, open the inlet valve, allow the liquid to fully enter the pump chamber, open the exhaust valve on the top of the water pump motor, and close the exhaust valve after confirming that there are no bubbles in the water.
2. Close the outlet valve of the pipeline to reduce the starting current.
3. Check if all parts are normal.
4. Connect the power and start to ensure the correct direction of operation. The correct direction of operation is determined by the pressure of the outlet voltage. If the outlet pressure is high and the noise is low, it is called forward rotation. If the outlet pressure is low and the noise is loud, it is called reverse rotation. Open the top exhaust valve here to exhaust the gas inside the motor.
5. Gradually adjust the opening of the outlet valve to ensure that the pump operates within the rated performance range as much as possible.
6. If any abnormality occurs during the operation of the pump, it should be stopped immediately to investigate the cause.
7. Check if the motor current value and temperature rise meet the requirements.
（2） Parking
1. Close the valve of the pump output pipeline.
2. Cut off the power and stop the motor from running.
3. Close the inlet valve.
Several installation methods and maintenance of pumps
（1） Preparation and inspection before startup
1. Check whether the grounding of the shielded motor and starting equipment is good and complete, whether the wiring is correct, and whether the contact is reliable.
2. For newly installed and long-term discontinued shielded electric pumps, the insulation resistance of the motor stator winding to ground should be checked before use.
3. Check if the pipeline is filled with the conveying liquid, ensuring that the inlet pressure of the conveying liquid is sufficient to fill the top position of the electric pump, that is, the inlet liquid level is higher than the height of the shielded electric pump.
4. Open the vent valve to completely remove the gas remaining in the electric pump, so that the pump chamber is truly filled with the conveying liquid before starting.
（2） Maintenance and upkeep during operation
1. The electric pump should be operated within the rated flow and head range, and the opening of the outlet valve should be controlled. The outlet valve should not be fully opened. To ensure the service life of the electric pump, it should not be operated for a long time under the extreme conditions of high flow and low head. During operation, open the exhaust valve to check if there is water overflow. If there is no water overflow, it indicates that the limit has been exceeded and the outlet valve should be closed.
2. Regularly record the voltage changes and voltage imbalance of the power supply. The voltage of the power supply is too high or too low, and the imbalance of three-phase voltage can cause the imbalance of current and current, which may cause overheating or other abnormal phenomena of the motor.
3. Regularly record the load current and imbalance of the electric pump. When an electric pump malfunctions, it mostly reflects a sharp increase in the current of the stator winding, causing the motor to overheat.
4. Regularly record the infusion temperature in the pipeline to ensure that the actual infusion temperature is lower than or equal to the specified infusion temperature, avoiding the electric pump from running in an over temperature state for a long time and reducing the service life of the motor.
5. Regularly record the pressure gauge value on the outlet end of the electric pump, and the pressure gauge value at the inlet must not be less than zero. The difference between the pressure gauge number at the outlet and the pressure gauge number at the inlet and outlet must comply with the specified pressure value.
6. The electric pump must be completely drained before each use, and during long-term operation, it must be drained once a week. Due to the long-term operation of the pump, water molecules are stirred and impacted at high speed inside the electric pump, and the medium being transported has a certain temperature. Therefore, the liquid will undergo gasification, causing the graphite bearing to be in a dehydrated state, i.e. dry friction. Dry friction can easily damage bearings and reduce their service life.
7. Pay attention to the odor, vibration, and noise of the electric pump. The winding of the motor will emit a burnt insulation odor due to high temperature. Typical mechanical failures may manifest as vibration and noise. Therefore, in case of any abnormality, power should be cut off immediately.
8. Regularly check the circulating fluid path of the electric pump and whether there is any blockage in the filtering device to prevent scale buildup.
9. Measure the gap between the graphite bearing and the shaft sleeve during scheduled maintenance to ensure even clearance and reliable operation between the stator shielding sleeve and the rotor shielding sleeve. In general, the table should be limited, and if it exceeds the specifications in the table, it should be repaired and replaced.
10. Regularly check the clearance between the impeller mouth ring and the pump body, as the clearance will directly affect the performance of the electric pump. If the clearance is too large, the impeller should be replaced in a timely manner.
Fault causes and troubleshooting methods
precautions
1. For shielded pipeline pumps that have been out of use for a long time, in addition to safety inspections, it is also necessary to check whether there is scaling in the shielded motor and whether the rotation is flexible.
2. When pumping non soft water, it is necessary to regularly remove the scale, usually once every three months: when pumping hot water, once a month.
3. Generally, the motor should be disassembled and inspected once a year to check the wear and tear of vulnerable parts, and replaced if necessary.
4. The maintenance of shielded motors must be carried out by professionals: if there are difficulties, please contact our unit.
5. In northern regions, special attention should be paid to antifreeze in winter. Before starting up, it is necessary to check the drainage valve to avoid unnecessary losses.
（1） Start and Run
1. Fill the water and exhaust, open the inlet valve, allow the liquid to fully enter the pump chamber, open the exhaust valve on the top of the water pump motor, and close the exhaust valve after confirming that there are no bubbles in the water.
2. Close the outlet valve of the pipeline to reduce the starting current.
3. Check if all parts are normal.
4. Connect the power and start to ensure the correct direction of operation. The correct direction of operation is determined by the pressure of the outlet voltage. If the outlet pressure is high and the noise is low, it is called forward rotation. If the outlet pressure is low and the noise is loud, it is called reverse rotation. Open the top exhaust valve here to exhaust the gas inside the motor.
5. Gradually adjust the opening of the outlet valve to ensure that the pump operates within the rated performance range as much as possible.
6. If any abnormality occurs during the operation of the pump, it should be stopped immediately to investigate the cause.
7. Check if the motor current value and temperature rise meet the requirements.
（2） Parking
1. Close the valve of the pump output pipeline.
2. Cut off the power and stop the motor from running.
3. Close the inlet valve.
Several installation methods and maintenance of pumps
（1） Preparation and inspection before startup
1. Check whether the grounding of the shielded motor and starting equipment is good and complete, whether the wiring is correct, and whether the contact is reliable.
2. For newly installed and long-term discontinued shielded electric pumps, the insulation resistance of the motor stator winding to ground should be checked before use.
3. Check if the pipeline is filled with the conveying liquid, ensuring that the inlet pressure of the conveying liquid is sufficient to fill the top position of the electric pump, that is, the inlet liquid level is higher than the height of the shielded electric pump.
4. Open the vent valve to completely remove the gas remaining in the electric pump, so that the pump chamber is truly filled with the conveying liquid before starting.
（2） Maintenance and upkeep during operation
1. The electric pump should be operated within the rated flow and head range, and the opening of the outlet valve should be controlled. The outlet valve should not be fully opened. To ensure the service life of the electric pump, it should not be operated for a long time under the extreme conditions of high flow and low head. During operation, open the exhaust valve to check if there is water overflow. If there is no water overflow, it indicates that the limit has been exceeded and the outlet valve should be closed.
2. Regularly record the voltage changes and voltage imbalance of the power supply. The voltage of the power supply is too high or too low, and the imbalance of three-phase voltage can cause the imbalance of current and current, which may cause overheating or other abnormal phenomena of the motor.
3. Regularly record the load current and imbalance of the electric pump. When an electric pump malfunctions, it mostly reflects a sharp increase in the current of the stator winding, causing the motor to overheat.
4. Regularly record the infusion temperature in the pipeline to ensure that the actual infusion temperature is lower than or equal to the specified infusion temperature, avoiding the electric pump from running in an over temperature state for a long time and reducing the service life of the motor.
5. Regularly record the pressure gauge value on the outlet end of the electric pump, and the pressure gauge value at the inlet must not be less than zero. The difference between the pressure gauge number at the outlet and the pressure gauge number at the inlet and outlet must comply with the specified pressure value.
6. The electric pump must be completely drained before each use, and during long-term operation, it must be drained once a week. Due to the long-term operation of the pump, water molecules are stirred and impacted at high speed inside the electric pump, and the medium being transported has a certain temperature. Therefore, the liquid will undergo gasification, causing the graphite bearing to be in a dehydrated state, i.e. dry friction. Dry friction can easily damage bearings and reduce their service life.
7. Pay attention to the odor, vibration, and noise of the electric pump. The winding of the motor will emit a burnt insulation odor due to high temperature. Typical mechanical failures may manifest as vibration and noise. Therefore, in case of any abnormality, power should be cut off immediately.
8. Regularly check the circulating fluid path of the electric pump and whether there is any blockage in the filtering device to prevent scale buildup.
9. Measure the gap between the graphite bearing and the shaft sleeve during scheduled maintenance to ensure even clearance and reliable operation between the stator shielding sleeve and the rotor shielding sleeve. In general, the table should be limited, and if it exceeds the specifications in the table, it should be repaired and replaced.
| Outer diameter of shaft sleeve (mm) | Wear limit clearance (mm) | Standard maximum gap (mm) |
| >18-30 | 0.4 | 0.131 |
| >30-50 | 0.45 | 0.158 |
| >50-80 | 0.5 | 0.192 |
10. Regularly check the clearance between the impeller mouth ring and the pump body, as the clearance will directly affect the performance of the electric pump. If the clearance is too large, the impeller should be replaced in a timely manner.
Fault causes and troubleshooting methods
| Fault phenomenon | Possible causes | Troubleshooting |
| 1. The water pump is not producing water | 1The import and export valves are not open,The import and export pipelines are blocked, and the impeller flow channel is blocked. | 1Check and remove blockages. |
| 2The direction of motor operation is incorrect, and the motor is running at a slow speed due to missing items. | 2Adjust the direction of motor operation and tighten the motor wiring. | |
| 3The suction pipe is leaking air. | 3Tighten all sealing surfaces and eliminate air. | |
| 4There is air inside the electric pump chamber. | 4Open the exhaust valve on the top of the motor and let in air. | |
| 5Insufficient imported water supply. | 5Shutdown inspection and adjustment. | |
| 6Excessive pipeline resistance and improper pump selection. | 6Reduce pipeline bends and reselect pumps | |
| 2. Insufficient water pump flow | 1. First, check the reasons as mentioned above. | 1. First, follow the above troubleshooting steps. |
| 2. The pipeline and pump passage impeller are partially blocked, with scale deposition and insufficient valve opening. | 2. Remove the blockage and readjust the valve opening. | |
| 3. The voltage is too low and the speed is too low. | 3. Stabilize voltage. | |
| 4. The impeller mouth ring is worn and there is excessive leakage. | 4. Replace the impeller. | |
| 3. Excessive power | 1. Exceeding the rated current usage. | 1. Adjust the valve at the street exit to lower the temperature. |
| 2. The impeller or rotating components have friction. | 2. Check, eliminate or replace components. | |
| 3. The sliding bearing is worn or broken. | 3. Replace the sliding bearing. | |
| 4. The specific gravity of the medium is too high. | 4. Modification. | |
| 4. Noise vibration | 1. The pipeline support is unstable. | 1. Stabilize the pipeline. |
| 2. The medium is mixed with gas. | 2. Increase the suction pressure and exhaust. | |
| 3. Generate cavitation phenomenon. | 3. Reduce the vacuum level. | |
| 4. Rotate the parts and spray them. | 4. Check, adjust or replace. | |
| 5. Motor overheating | 1. Excessive traffic and overloaded operation. | 1. Adjust the outlet valve to reduce the flow rate. |
| 2. The stator rotor is rubbed by collision. | 2. Check and eliminate. | |
| 3. Insufficient voltage | 3. Stabilize voltage. | |
| 4. The cooling system pipeline is blocked. | 4. Clear the blockage and clean the filter screen at the outlet of the water pump. | |
| 6. The outlet valve does not release water | 1. The outlet pipeline contains air. | 1. Remove air from the pipeline. |
| 2. There is no pressure on exports. | 2. Sending water to pipelines requires a certain pressure. |
precautions
1. For shielded pipeline pumps that have been out of use for a long time, in addition to safety inspections, it is also necessary to check whether there is scaling in the shielded motor and whether the rotation is flexible.
2. When pumping non soft water, it is necessary to regularly remove the scale, usually once every three months: when pumping hot water, once a month.
3. Generally, the motor should be disassembled and inspected once a year to check the wear and tear of vulnerable parts, and replaced if necessary.
4. The maintenance of shielded motors must be carried out by professionals: if there are difficulties, please contact our unit.
5. In northern regions, special attention should be paid to antifreeze in winter. Before starting up, it is necessary to check the drainage valve to avoid unnecessary losses.
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