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ISW Type Horizontal Pipeline Centrifugal Pump
Flow: 1-1500m³/h
Head: 7-150m
Power: 0.18-2500kw
Efficiency: 19%-84%
Pump Weight: 17-2200kg
NPSH (Net Positive Suction Head): 2.0-6.0m
Price: 0.15-29,800
The ISW type horizontal centrifugal pump series is a variable frequency horizontal single-stage single-suction pipeline centrifugal pump. It is a new generation of energy-saving and environmentally friendly horizontal centrifugal pipeline pump designed and manufactured by Zhonglian Pump Industry, based on the unique structural combination of IS type centrifugal pumps and vertical pumps, and strictly following international standard ISO2858 and national pipeline centrifugal pump standard JB/T53058-93. This pump adopts advanced domestic hydraulic model optimization design. The ISW pipeline centrifugal pump is also designed according to usage temperature, medium, etc.
Product Overview
Product Parameters
Working Conditions and Model Significance of ISW Horizontal Pipeline Centrifugal Pump:
1. The suction pressure of the horizontal pipeline pump should be ≤1.0Mpa, or the maximum working pressure of the pump system should be ≤1.6Mpa, that is, the pump inlet pressure plus pump head ≤ 1.6Mpa. The static pressure test of the pump is 2.5Mpa. Please specify the system working pressure when ordering. If the pump system working pressure is greater than 1.6Mpa, it should be specified separately when ordering so that the pump's flow parts and connection parts can be made of cast steel during manufacturing.
2. Ambient temperature <40℃, relative humidity <95%.
3. The volume content of solid particles in the conveyed medium does not exceed 0.1% per unit volume, particle size <0.2mm.
Note: If the medium contains fine particles, please specify when ordering to use wear-resistant mechanical seals.


Applications of ISW Horizontal Pipeline Centrifugal Pump:
1. ISW horizontal pipeline pump is used for conveying clean water and other liquids with physical and chemical properties similar to clean water. It is suitable for industrial and urban water supply and drainage, high-rise building water boosting, garden irrigation, fire fighting boosting, and equipment matching. Operating temperature T: ≤80℃.
2. ISWR (WRG) type hot water (high temperature) circulation pump is widely used in energy, metallurgy, chemical, textile, papermaking, hotels, and other boiler high-temperature hot water boosting circulation and urban heating system circulation pumps. ISWR operating temperature T: ≤120℃, WRG operating temperature T: ≤240℃.
3. ISWH horizontal chemical pump is used for conveying liquids without solid particles, corrosive, and with viscosity similar to water. It is suitable for petroleum, chemical, metallurgy, electric power, papermaking, food, pharmaceutical, and synthetic fiber industries. Operating temperature T: -20℃ to 120℃.
4. ISWB horizontal oil pump is used for conveying petroleum products such as gasoline, diesel, and kerosene. Operating temperature T: -20℃ to 120℃.
Structure Diagram and Structural Features of ISW Horizontal Pipeline Centrifugal Pump:


1 Base 2 Drain Hole 3 Pump Body 4 Impeller 5 Pressure Tapping Hole 6 Mechanical Seal 7 Water Ring 8 End Cover 9 Motor 10 Shaft
Structure of horizontal pipeline pump is shown in the figure: The unit consists of three parts: pump, motor, and base. The pump structure includes pump body, impeller, pump cover, mechanical seal, and other components. The pump is a single-stage single-suction horizontal centrifugal type. The pump body and pump cover are split from the back of the impeller, which is a rear-opening structure. Most pumps have sealing rings on both the front and back of the impeller, and a balance hole on the impeller back cover plate to balance the axial force acting on the rotor. The pump inlet is axial horizontal suction, and the outlet is arranged vertically upward. The pump and motor are coaxial. The motor shaft extension end uses double angular contact ball bearings to partially balance the residual axial force of the pump. The pump is directly connected to the motor, requiring no alignment during installation, sharing a common base, and vibration isolation is done using JG type isolators.
Structural Features of Horizontal Pipeline Pump:
1. Smooth operation: The absolute concentricity of the pump shaft and excellent dynamic and static balance of the impeller ensure smooth operation without vibration.
2. No leakage: Hard alloy seals of different materials ensure no leakage during the conveyance of different media.
3. Low noise: The pump operates smoothly with two low-noise bearings, basically no noise except for slight motor sound.
4. Low failure rate: Simple and reasonable structure, key parts use internationally first-class quality components, greatly increasing the fault-free working time of the whole unit.
5. Easy maintenance: Easy replacement of seals and bearings.
6. Space-saving: The outlet can be directed left, right, or upward, facilitating pipeline layout and installation, saving space.
Maintenance and Repair of Horizontal Pipeline Centrifugal Pump:
(1) Maintenance and care during operation of horizontal pipeline pump:
1. The inlet pipeline must be highly sealed.
2. It is forbidden for the pump to run under cavitation conditions for a long time.
3. It is forbidden for the motor to run with overcurrent for a long time when the pump is running at high flow.
4. Regularly check the motor current during pump operation to ensure the pump works under standard conditions as much as possible.
5. The pump should be monitored by a dedicated person during operation to prevent accidents.
6. The pump bearings should be lubricated every 500 hours of operation. Motors with power greater than 11kW are equipped with lubrication devices and can be directly injected with a high-pressure oil gun to ensure good bearing lubrication.
7. After long-term operation, due to mechanical wear, if noise and vibration increase, stop the pump for inspection. Replace worn parts and bearings if necessary. The general overhaul period is one year.
(2) Maintenance and care of mechanical seals of horizontal pipeline pump:
1. Mechanical seal lubrication should be clean and free of solid particles.
2. Mechanical seals must not operate under dry friction conditions.
3. Before starting, manually rotate the pump (motor) several turns to prevent sudden start from causing seal ring breakage.
Starting, Operation, and Stopping of Horizontal Pipeline Centrifugal Pump:
(1) Starting and operation of horizontal pipeline pump:
1. Manually turn the motor fan blade; the impeller should rotate freely without jamming.
2. Manually rotate the pump to allow lubricant to enter the mechanical seal end face.
3. Water filling and air venting: Open the inlet valve to allow the liquid to fully enter the pump chamber until the entire pipeline is filled with liquid, ensuring the sealing of the inlet pipeline.
4. Close the outlet valve to reduce the starting current.
5. Turn on the power, start the pump, and confirm the correct running direction. Viewed from the motor fan end, it rotates clockwise.
6. Gradually adjust the opening of the outlet valve to make the pump operate as close to the rated condition as possible.
7. During pump operation, if noise or unusual sounds are detected, stop immediately for inspection.
8. Normal mechanical seal leakage should be less than 3 drops per minute. Check the motor and ensure the bearing temperature rise is below 70°C; if exceeded, investigate the cause.
(2) Horizontal pipeline pump shutdown:
1. Close the discharge pipeline valve.
2. Cut off the power supply and stop the motor.
3. Close the inlet valve.
4. If the pump is to be out of service for a long time, drain all liquid inside the pump.
ISW type horizontal pipeline centrifugal pump model parameters:
ISW25-110 | ISW50-250A | ISW80-250A | ISW150-250B | ISW250-250(I)A |
ISW25-125A | ISW50-250B | ISW80-250B | ISW150-250 | ISW250-250(I) |
ISW25-125 | ISW50-250 | ISW80-250 | ISW150-315(I)A | ISW250-250 |
ISW25-160A | ISW50-315(I)A | ISW80-315(I)A | ISW150-315(I)B | ISW250-300 |
ISW25-160 | ISW50-315(I)B | ISW80-315(I)B | ISW150-315(I) | ISW250-315A |
ISW32-100 | ISW50-315(I) | ISW80-315(I)C | ISW150-315A | ISW250-315B |
ISW32-125A | ISW65-100(I)A | ISW80-315(I) | ISW150-315B | ISW250-315 |
ISW32-125 | ISW65-100(I) | ISW80-315A | ISW150-315 | ISW250-400A |
ISW32-160A | ISW65-100A | ISW80-315B | ISW150-350A | ISW250-400B |
ISW32-160 | ISW65-100 | ISW80-315C | ISW150-350B | ISW250-400 |
ISW32-200A | ISW65-125(I)A | ISW80-315 | ISW150-350 | ISW250-500A |
ISW32-200 | ISW65-125(I) | ISW80-350A | ISW150-400A | ISW250-500B |
ISW40-100(I)A | ISW65-125A | ISW80-350B | ISW150-400B | ISW250-500C |
ISW40-100(I) | ISW65-125 | ISW80-350 | ISW150-400C | ISW250-500 |
ISW40-100A | ISW65-160(I)A | ISW100-100A | ISW150-400 | ISW300-235A |
ISW40-100 | ISW65-160(I)B | ISW100-100 | ISW150-500 | ISW300-235B |
ISW40-125(I)A | ISW65-160(I) | ISW100-125A | ISW200-200(I)A | ISW300-235 |
ISW40-125(I) | ISW65-160A | ISW100-125 | ISW200-200(I) | ISW300-250A |
ISW40-125A | ISW65-160B | ISW100-160A | ISW200-200A | ISW300-250 |
ISW40-125 | ISW65-160 | ISW100-160B | ISW200-200GA | ISW300-300A |
ISW40-160(I)A | ISW65-200(I)A | ISW100-160 | ISW200-200G | ISW300-300B |
ISW40-160(I)B | ISW65-200(I)B | ISW100-200A | ISW200-200 | ISW300-300 |
ISW40-160(I) | ISW65-200(I) | ISW100-200B | ISW200-250(I)A | ISW300-315A |
ISW40-160A | ISW65-200A | ISW100-200 | ISW200-250(I)B | ISW300-315B |
ISW40-160B | ISW65-200B | ISW100-250A | ISW200-250(I) | ISW300-315 |
ISW40-160 | ISW65-200 | ISW100-250B | ISW200-250A | ISW300-390A |
ISW40-200(I)A | ISW65-250(I)A | ISW100-250 | ISW200-250B | ISW300-390B |
ISW40-200(I)B | ISW65-250(I)B | ISW100-315A | ISW200-250GA | ISW300-390 |
ISW40-200(I) | ISW65-250(I) | ISW100-315B | ISW200-250GB | ISW300-400A |
ISW40-200A | ISW65-250A | ISW100-315 | ISW200-250G | ISW300-400 |
ISW40-200B | ISW65-250B | ISW100-350A | ISW200-250 | ISW300-500A |
ISW40-200 | ISW65-250 | ISW100-350B | ISW200-315(I)A | ISW300-500B |
ISW40-250(I)A | ISW65-315(I)A | ISW100-350 | ISW200-315(I)B | ISW300-500C |
ISW40-250(I)B | ISW65-315(I)B | ISW125-100A | ISW200-315(I) | ISW300-500 |
ISW40-250(I) | ISW65-315(I) | ISW125-100 | ISW200-315A | ISW350-235 |
ISW40-250A | ISW65-315A | ISW125-125A | ISW200-315B | ISW350-300 |
ISW40-250B | ISW65-315B | ISW125-125 | ISW200-315GA | ISW350-315 |
ISW40-250 | ISW65-315 | ISW125-160A | ISW200-315GB | ISW350-400 |
ISW50-100(I)A | ISW80-100(I)A | ISW125-160B | ISW200-315G | ISW350-450A |
ISW50-100(I) | ISW80-100(I) | ISW125-160 | ISW200-315 | ISW350-450 |
ISW50-100A | ISW80-100A | ISW125-200A | ISW200-400(I)A | ISW350-500 |
ISW50-100 | ISW80-100 | ISW125-200B | ISW200-400(I)B | ISW350-525A |
ISW50-125(I)A | ISW80-125(I)A | ISW125-200 | ISW200-400(I)C | ISW350-525B |
ISW50-125(I) | ISW80-125(I) | ISW125-250A | ISW200-400(I) | ISW350-525 |
ISW50-125A | ISW80-125A | ISW125-250B | ISW200-400A | ISW350-600A |
ISW50-125 | ISW80-125 | ISW125-250 | ISW200-400B | ISW350-600B |
ISW50-160(I)A | ISW80-160(I)A | ISW125-315A | ISW200-400C | ISW350-600 |
ISW50-160(I)B | ISW80-160(I)B | ISW125-315B | ISW200-400GA | ISW400-300 |
ISW50-160(I) | ISW80-160(I) | ISW125-315 | ISW200-400GB | ISW400-315 |
ISW50-160A | ISW80-160A | ISW150-125A | ISW200-400GC | ISW400-450A |
ISW50-160B | ISW80-160B | ISW150-125 | ISW200-400G | ISW400-450 |
ISW50-160 | ISW80-160 | ISW150-160A | ISW200-400 | ISW400-500A |
ISW50-200(I)A | ISW80-200(I)A | ISW150-160B | ISW200-500(I)A | ISW400-500B |
ISW50-200(I)B | ISW80-200(I)B | ISW150-160 | ISW200-500(I)B | ISW400-500 |
ISW50-200(I) | ISW80-200(I) | ISW150-200A | ISW200-500(I)C | ISW400-600A |
ISW50-200A | ISW80-200A | ISW150-200B | ISW200-500(I) | ISW400-600B |
ISW50-200B | ISW80-200B | ISW150-200 | ISW200-500GA | ISW400-600C |
ISW50-200 | ISW80-200 | ISW150-250(I)A | ISW200-500GB | ISW400-600 |
ISW50-250(I)A | ISW80-250(I)A | ISW150-250(I)B | ISW200-500GC | ISW500-300 |
ISW50-250(I)B | ISW80-250(I)B | ISW150-250(I) | ISW200-500G | ISW500-315 |
ISW50-250(I) | ISW80-250(I) | ISW150-250A | ISW250-235 |
Kind Reminder: Click the model above to view specific detailed parameters and performance curves. For more parameters, please directly check the pump selection page.
Why Choose Us?
Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.
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Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。
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