KBS single-stage double suction open pump

1、 Overview

The KBS pump is a new generation of high-performance single-stage double suction open type centrifugal pump. The pump uses an excellent hydraulic model, which increases the efficiency of the pump by 2-3% compared to similar pumps, greatly reducing the operating cost of the pump. The vacuum height is increased by 1-3 meters, thereby reducing civil engineering investment and extending the service life. The inlet and outlet are on the same straight line, and the same rotor can run in reverse. The support spacing between the two ends of the water pump is short, the pump runs stably, has low vibration and noise, and can be operated at an appropriate speed, making the water pump more adaptable to a wider range. The pump body can be installed vertically or horizontally according to the changes in use, mainly used in water plants, air conditioning circulating water, heating pipe network systems, building water supply, irrigation, drainage pump stations, power plants, industrial water supply systems, fire protection systems, shipbuilding industry, mining water supply and drainage, etc. It is a comprehensive replacement product of SH, S, SA, SLA, SAP type split double suction pumps.

2、 Model meaning

KBS 250-480 A-L - R (M, F) - J

3、 Main technical parameters

Pump outlet diameter: DN=80~800mm

● Flow rate: Q=22~11660m3/h

Head: H=7~200m

● Working temperature: T=-20 ℃~105 ℃ (KBS type)=-60 ℃~200 ℃ (KBS-R type)

Solid particles: ≤ 80mg/l

● Allowable working pressure: ≤ 2.5Mpa (KBS type) ≤ 4Mpa (KBS-R type)

4、 Structural description

1. Structure

The inlet and outlet are on the same straight line, and the same rotor can run in reverse. The support spacing between the two ends of the water pump is short, and the pump runs stably with low vibration and noise. It can also run at an appropriate speed, making the water pump more adaptable to a wider range. The water pump can be equipped with an intermediate bracket, thickened pump body, sealed cooling, and bearing lubrication, making it suitable for operating at temperatures up to 200 ℃, especially for the requirements of heating pipe networks. The pump body can be installed vertically or horizontally according to changes in usage conditions, and mechanical seals or packing seals can be used for sealing.

2. Technical advantages

The support spacing between the two ends of the water pump is short, the pump runs stably, has low vibration and noise, and can be operated at an appropriate speed, making the water pump more adaptable to a wider range.

The inlet and outlet are on the same straight line, making the pipeline layout simple, convenient, and beautiful.

The same rotor can run in reverse, reducing the risk of water hammer causing damage to the water pump.

The unique high-temperature design of the water pump includes an intermediate support, thickened pump body, sealed cooling, and bearings lubricated with thin oil, making it suitable for operating at temperatures up to 200 ℃ and particularly suitable for use in heating pipelines.

The pump body can be installed vertically or horizontally depending on the usage, and mechanical seals or packing seals can be used for sealing.

The appearance of the water pump is designed with industrialization, with clear lines that conform to modern aesthetic standards.

3. Cost advantage:

By selecting an excellent hydraulic model, the efficiency of the pump is 2-3% higher than that of similar pumps, greatly reducing the operating cost of the pump.

The vacuum height is increased by 1-3 meters, thereby reducing civil engineering investment and extending the service life.

Imported bearings are selected, and parts materials can be chosen according to user requirements, enabling the pump to adapt to various on-site operating conditions and greatly reducing maintenance costs.

4. Maintenance advantages:

Containerized mechanical seals make replacing mechanical seals an easy and simple task.

The application of elastic prestressing assembly makes the assembly and disassembly of rotor components simple and quick.

No need to adjust various clearances during assembly.

5、 Pump structure diagram

1. Pump body 2, impeller 3, pump cover 4, water flushing pipe component 5, sealing ring

6. Pipe plug 7, O-ring seal 8, sealing body 9, sealing gland or packing gland 10, water blocking ring

11. Bearing gland 12, bearing body 13, shaft 14, skeleton oil seal 15, elastic retaining ring

16. Bearing retaining ring 17, shaft sleeve 18, mechanical seal or packing seal 19, bearing sleeve 20, bearing

21. Bearing washer 22. Butterfly spring 23. Lock nut

6、 Material List of Main Components

7、 Performance parameter table

8、 Installation and usage instructions for the pump

Special Reminder:

The installation of the pump must be carried out by trained and experienced personnel with expertise in water pump installation.

● General requirements:

1. The axial and radial deviations of the pump and motor coupling shall not exceed 0 04mm， Rotate the measuring tool evenly at both ends of the coupling by 90 degrees each time, and check with a vernier caliper or micrometer. The readings at all points must be uniform.

2. It is not allowed to use the pump as a fulcrum for the pipeline. Reliable supports should be provided near the pump, and no stress or deformation should be transmitted at the connection between the pump and the pipeline. The nominal diameter of the pipeline must be greater than or equal to the diameter of the corresponding pump, and appropriate methods must be used to compensate for the thermal expansion of the pipeline, so that the pump is not subjected to additional loads.

1） Installation and adjustment of pumps

The installation of the pump must be carried out by trained and experienced personnel with expertise in water pump installation.

1) Measure and record the position of the pump.

2) Place the pump motor unit on the foundation, insert the anchor bolts into the foundation and adjust them. Leave a gap of 4-5mm between the foundation and base.

3) Grout the foundation bolts and make them sturdy.

4) After the foundation is solid, tighten the anchor bolts evenly.

5) Adjust and grout the base.

2） Bearing lubrication

The bearings have been greased at the manufacturing plant and checked before starting. If impurities enter the bearings during transportation and storage, or if the grease has solidified or leaked, the grease must be replaced before starting.

The bearing must be replaced with grease after running for up to two years. The bearings must be removed every time the grease is replaced. Before replacing the grease, clean the bearings, bearing bodies, and bearing covers with gasoline or similar media, and wipe them clean. Completely fill the ball bearings and ball bearings with grease, while only half of the grease is filled in the bearing gland. Use an oil gun to add oil to the oil nozzle on the upper part of the bearing body.

Sliding bearings are lubricated with media or external water sources. To prevent bearing blockage, the bearings must be cleaned every 8000 hours or at most two years of operation, and the lubrication pipeline must be ensured to be unobstructed.

3） Maintenance of shaft seal

If the shaft seal leaks significantly or is shut down for a long time, the packing should be installed or replaced before starting the pump. When the pump is running, there is a small amount of water dripping from the packing box. If the packing is pressed too tightly, it will cause the shaft sleeve to heat up and wear out. Therefore, the packing must be gently and evenly compressed.

Mechanical seal: Mechanical seals do not require special maintenance and should be checked daily for heat generation. If the mechanical seal leaks significantly, disassemble and inspect it, and replace the mechanical seal if necessary.

4） Dismantling

As long as the pump cover is removed, the entire rotor component can be dismantled without dismantling the inlet and outlet water pipelines;

1) Close the inlet and outlet pump covers, open the drain and vent plugs, and drain the water and air;

2) Loosen the fasteners between the pump coupling and the motor coupling;

3) Release and press out the packing cover;

4) Loosen the connecting bolts between the pump cover and the pump body, and remove the pump cover;

5) Loosen the connecting bolts between the bearing body and the pump body, and remove the rotor components;

6) Remove the pump coupling and bearing cover;

7) Loosen the nut and press out the bearing body, including the bearing, from the shaft to ensure even pressure. Do not use a hammer, as it may damage the bearing;

8) Remove the packing, packing ring, and liner, loosen the shaft nut, and remove the shaft sleeve. There is a clearance fit between the impeller and the shaft, so the impeller can be easily removed. If it cannot be removed, use a wooden hammer to strike the wheel hub.

5） Reinstall

The reassembly can be carried out in the opposite direction of the disassembly sequence mentioned above. When assembling and disassembling oil seals, bearings, pump bodies, and impeller sealing rings, follow the standardized assembly process and installation instructions.

Before installing the pump cover, to prevent the packing ring from entering the packing box, stick the packing ring onto the packing cover.

Ensure that the pump and motor couplings are flush with the shaft ends of the pump and motor, and that the shaft does not protrude.

9、 Pump operation/start/stop

1） Prepare

1. Pump infusion and auxiliary pipeline inspection

The pump must be properly deflated and filled with medium before starting, and the shut-off valve in the inlet pipeline must be appropriately opened.

Attention: The pump is not allowed to run dry! Safely open auxiliary pipelines (flushing, sealing, coolant, etc.) and check the flow rate.

2. Check the bearing lubricant and shaft seal

3. Check the rotor rotation direction

The motor direction should be the same as the arrow direction on the pump casing. Check the pump direction before connecting the motor.

2） Start up

-If there is no check valve, close the outlet valve;

-Safely open the inlet valve (if any);

-If available, open the external water source valve of the shaft seal and bearing;

-Turn on the power supply;

-At the beginning of the pump, the water is pumped and the pressure on the pressure gauge rises. Slowly open the outlet valve to ensure that the pump operates within the specified parameter range.

The pump should only close the outlet valve when starting and stopping, otherwise the 7J, 19 heating pin will be damaged.

3） Stop it

-Close the shut-off valve in the outlet pipeline;

-If there is a check valve in the outlet pipeline, the shut-off valve can remain open to obtain a back pressure; -Turn off the motor;

-If available, close the inlet valve;

-Close the auxiliary pipeline;

-If there is cooling water, wait for the pump to cool down before turning it off.

-If frost or prolonged parking occurs, drain the water pump and cooling chamber (if any), or take other anti freezing measures. If the pump is equipped with a packing seal, remove the packing. If the pump is processing sewage, to prevent corrosion during parking, drain and flush it.

10、 Maintenance/Operation Management

The pump should be kept stable during operation, otherwise the bearings and shaft seals will be damaged, and the pump is not allowed to run dry. The pump cannot operate for a long time with the outlet valve closed. The maximum temperature of the bearing is allowed to exceed the ambient temperature by 50 º or not exceed 90 º.

When the pump is running, the valves in the auxiliary pipeline must be kept open. If the pump is equipped with a packing seal, there should be a small amount of dripping during operation, and the packing gland should be gently pressed.

Regularly check the standby pump to ensure that it can operate normally, and rotate the pump shaft regularly. Regularly inspect the coupling components and replace them if wear is found. The external sealing, cooling, and lubricating water must be 1.2-2.Obar higher than the inlet pressure.

11、 Common malfunctions and their elimination

1） Fault

P - Power

H - Total head, efficiency

NPSH - cavitation allowance

Many operational failures of pumps are usually caused by hydraulic reasons. The hydraulic characteristics of a pump are represented by its characteristic curves H, P, η, and NPSH, as well as the device characteristic curves HA and NPSHA. The operating point B is the intersection of the device characteristic curve HA and the pump characteristic curve H.

If the cause of the malfunction cannot be determined, please contact the manufacturer.

Special reminder: Please do not disassemble the water pump without the manufacturer's consent. Otherwise, the manufacturer may be exempted from after-sales responsibility.

2） Fault List:

3） Exclude

Note: 1) Please consult our factory for the bidding documents

This manual reserves the right to make partial changes due to technological advancements!