Burks BH Series Centrifugal Pump Pipeline Pump

Overview

The BH series in-line circulating pumps are of vertical construction, with inlet and outlet ports of the same diameter on a common centre line, so the pump can be installed directly in the pipeline like a valve. They are used for industrial and municipal water supply and drainage, pressure boosting in high-rise buildings, garden irrigation and HVAC/refrigeration circulation, handling clean water and other liquids whose physical and chemical properties are similar to water.

Operating Conditions

Ambient temperature 0~40 ℃, liquid temperature 0~100 ℃, relative humidity below 90%, altitude below 1000 m; solids in the pumped liquid not over 0.1% by volume and particle size not over 0.2 mm. The pump casing is cast iron, and the mechanical seal is carbon and ceramic.

Specification

Common Data

Notes Before Use

Please read this manual carefully before use, so as to use the water pump correctly. The Caution/Warning marks in this manual are for the correct use of the product and for preventing the occurrence of hazards and losses; please strictly observe them. Warning - if this mark is ignored and the product is used incorrectly, serious injury or death may be caused. Caution - if this mark is ignored and the product is used incorrectly, personal injury or material loss may occur.

1. To prevent accidental electric leakage, please install a leakage protector of 30mA or below to supply power.

2. To prevent accidental electric shock accidents, turn off the power when installing the water pump, installing the power supply, disassembling or repairing.

3. When transporting and installing the water pump, it is forbidden to lift the water pump by grasping the power cord; damage to the power cord may cause electric leakage and electric shock accidents.

4. Extending the power cord is also an important matter; when using the pump, avoid electric leakage or wire breakage at the joint, so as to avoid electric shock accidents. Method of extending the power cord: when stripping the power cord, prevent the copper wire from being damaged, and avoid the copper wire length being too long or too short; the joint should first be wrapped with rubber tape and then with more than 4 layers of insulating tape.

5. Do not bend, wrap, pull or twist the power cord, otherwise it will cause electric leakage, electric shock, fire and other accidents.

6. The ground wire must be connected before use, so as to prevent electric shock accidents when the insulation is poor; the ground wire can be connected directly to a steel or copper water pipe.

7. To prevent water leakage or reduce the resistance of water, shorten the pipeline length as much as possible and reduce pipeline bends.

8. Please use the water pump within the specified voltage, otherwise faults may occur; in areas with serious voltage difference, please consult the power department. Do not connect it to a tap water pipe; if connection is required, permission from the relevant department must be obtained, and connection may also shorten the service life of the water pump.

9. It is forbidden to subject the pump to impact, otherwise it will cause damage and faults.

10. Do not install the water pump on a closed-circuit pipeline; if it is installed on a boiler, an expansion pipe must be installed at the same time.

11. Avoid running the water pump in a waterless state, as this will shorten the service life of the water pump.

12. Avoid the power cord coming into contact with high-temperature objects.

13. Do not expose the water pump to direct sunlight or rain, which will shorten the service life of the water pump and cause electric shock accidents.

14. No liquid other than water can be used; when soluble substances such as benzoic acid, flammable substances such as gasoline, and high-viscosity liquids are used, fire is easily caused, and the pump is prone to faults and its service life is shortened.

15. To prevent electric shock accidents, ensure that the power supply voltage is within the rated voltage (220V) ±10% range and use a dedicated fixed socket of AC220V; do not wet the power cord plug or touch the plug with wet hands.

16. The system pressure must not exceed the maximum pressure of the water pump.

Safety

Personnel qualifications: the personnel installing the water pump must have the corresponding qualifications. Hazards caused by not observing safety protection measures: for personal injury or water pump damage caused by not observing safety protection measures, the manufacturer bears no responsibility and undertakes no claim; not observing safety precautions will lead to: 1) the water pump or equipment will lose its main or important functions; 2) electrical and mechanical injury to personnel. Safety protection measures for operators: the important specifications in this manual must be observed to eliminate possible injuries. Safety specifications for inspection and installation: the operator is responsible for ensuring that inspection and installation of the water pump are carried out by qualified and trained professionals; maintenance can only be carried out after unplugging the power supply and ensuring that the water pump has stopped running. Self-modification of equipment and self-made spare parts: self-modification of equipment must be approved by the manufacturer; using original spare parts and products authorized by the manufacturer will ensure safety; if other parts are used, the manufacturer will not bear any consequences and responsibilities arising therefrom. Use: the manufacturer only guarantees the reliability of the water pump within the range described in this manual, and the limit values in the product samples and this manual are not allowed to be exceeded.

Product Overview

The BH series water pump is a hot water circulation pump, suitable for industrial and urban water supply and drainage, pressurized water supply for high-rise buildings, garden sprinkling irrigation, HVAC refrigeration circulation and other aspects; the conveyed medium is clean water and other liquids whose physical and chemical properties are similar to clean water. The pump has a vertical structure; the inlet and outlet diameters are the same and are located on the same center line, so it can be installed in the pipeline like a valve; it has a compact and beautiful appearance, a small floor area and low construction investment; if a protective cover is added, it can be placed outdoors for use. The impeller is directly installed on the extended shaft of the motor, with a short axial dimension and a compact structure; the hydraulic components and the motor are well matched, effectively balancing the radial and axial loads generated by the operation of the pump, thus ensuring that the pump runs smoothly with very low vibration and noise. The mechanical seal is made of wear-resistant material, effectively extending the service life of the mechanical seal. The series or parallel operation mode and installation mode of the pump can be selected according to the requirements of use.

Operating Conditions

Illustration and Part Names

Note: the figure is for reference only; the actual product may differ according to the model.

Pump Outline Dimension Drawing

The outline dimensions of each model (W/L/H/S/a/b/c/d) are given in a model-by-model data table; for detailed data, please refer to the user manual.

Technical Parameters

This series has 12 models in total: BH-043EH, BH-044EH,BH-102EH, BH-150EH, BH-256EH, BH-257EH, BH-255EH, BH-750EH, BH-751EH, BHBH-751QH, BH-1501Q, BH-2201QH. Among them, BH-751QH, BH-1501Q and BH-2201QH are three-phase 380V/50Hz, and the rest are single-phase 220V/50Hz. The conveyed medium is clean water, and the fluid temperature is ≤100℃; the pump casing material is cast iron, and the mechanical seal is carbon & ceramic. The input power, output power, maximum head, maximum flow, rated flow, rated head, inlet size, outlet size, maximum pressure, protection class and weight of each model are given in a model-by-model parameter table; for detailed data, please refer to the user manual.

Performance Curves

Installation Precautions

1) Please install the water pump in the correct direction. Special note: when an incorrect water pump installation direction is adopted, as shown in the figure below, it is easy to cause loud noise or water leakage, resulting in a shortened service life of the motor bearing (the pump being full of air and water entering the motor are both incorrect installations).

2) To facilitate inspection and maintenance, choose an appropriate position to install the water pump; to ensure that the motor is in a good ventilation state, the motor fan should be at least 30cm away from the wall.

3) As shown in the figure below, control valves must be installed on the inlet and outlet pipes of the water pump; if the direction of the inlet flange and outlet flange is changed arbitrarily, ensure that the terminal box installation position faces upward.

4) To avoid pipeline blockage, a filter (Y type) needs to be installed on the pipeline, and confirm once a month whether the circulating water needs to be replaced.

5) If there is air in the water pump or pipeline and the water cannot circulate, the air can be discharged in time through the drain screw on the water pump or the air vent valve on the pipeline; method: just unscrew the drain screw on the pump body with a screwdriver, as shown in the figure below.

6) When the water pump is installed on a boiler (used for gasoline, coal bricks, charcoal, etc.), it must be installed according to the "Piping Reference Diagram"; especially when installed on coal and charcoal boilers, never install the water pump in front of the fire mouth, but install it on the side or behind the fire mouth.

7) The hot water circulation piping should be installed with an expansion pipe and an expansion tank; the height of the overflow pipe on the pump should be kept below 40m; if the overflow pipe is too long, reverse pressure will be generated on the pipeline and poor operation will occur.

8) If it is used for drinking water, please use a water purifier, because harmful substances or bacterial infection may be produced during the installation process and under other conditions.

Piping Reference Diagram

Operation Precautions

Operation precautions during maintenance and inspection:

1. During the first operation, if there is obvious vibration or strange noise or odor, please cut off the switch immediately, pull out the plug, and contact the dealer or after-sales service center; if it continues to be used, electric leakage may occur, causing fire and other accidents.

2. Do not disassemble or modify the product, otherwise fire, electric leakage and other accidents will occur; do not hand the product over to non-designated technicians for disassembly or repair; for repair and when a fault is found, please ask the service center or a designated dealer.

3. To prevent accidents, when the power cord is damaged, please replace the power cord through the sales outlet or a qualified technician.

4. After the water pump is reassembled, it must be debugged when it is restarted; if there is a problem with the assembly, abnormal operation or water leakage may occur.

5. When checking the water pump, to prevent electric shock or the danger caused by the water pump suddenly running, please pull out the plug.

Start-up and Stop

Before starting, the following preparations must be made - the water pump is filled with water. (1) When the water tank is above the water pump: close the inlet valve; open the outlet valve, slightly open the inlet valve, so that the water flows out through the drain valve of the pump casing, and fully discharge the gas in the pump body; close the outlet valve and fully open the suction valve. (2) When the water tank is below the water pump: open the inlet valve and close the outlet valve; open the priming valve to fill water, and after the air is fully discharged, tighten the priming valve; the suction pipe should be filled with water and the air discharged.

Start-up: fully open the inlet valve; close the outlet pipeline valve; check whether the motor rotation direction is correct - it is clockwise rotation when viewed from the motor fan cover end toward the pump; adjust the opening of the outlet valve to meet the required working condition; if the user has installed a flow meter or pressure gauge at the pump outlet, the pump should be made to operate at the rated point specified in the performance parameter table through the outlet valve opening, and at the same time measure the motor regulating current of the pump, so that the motor operates within the rated current; otherwise, the pump will be overloaded (i.e., large current operation) and the motor will be burned.

Stop: close the outlet pipeline valve; stop the motor; close the inlet valve; if stopped for a long time, drain the water in the water pump and the pipeline. When the medium is high-temperature water, to prevent personal injury, pay special attention when venting. The water pump is strictly forbidden to run continuously without flow for more than 10 minutes; running without flow will damage the mechanical seal; if the damaged mechanical seal continues to be used, water leakage will occur; in the case of high-temperature water, accidents may also occur.

Pump Maintenance

Maintenance during operation: the inlet pipeline must be filled with liquid, and the pump is forbidden to run for a long time in a cavitation state; check the motor current value regularly, and it must not exceed the rated current value of the motor; after the pump has been running for a long time, due to mechanical wear, when the noise and vibration of the unit increase, the pump should be stopped for inspection, and vulnerable parts and bearings can be replaced when necessary; the overhaul period of the unit is generally one year.

Mechanical seal maintenance: the mechanical seal lubrication should use a clean medium without solid particles; the mechanical seal is strictly forbidden to work under dry grinding conditions; before starting, the motor shaft should be rotated several turns first, so as to avoid the graphite water ring breaking and being damaged due to sudden starting; the allowable seal leakage value is 3 drops/minute, otherwise the mechanical seal should be checked.

Take antifreeze measures in winter: in winter, the pump and pipeline are prone to freezing, causing pipeline damage, pump deformation or damage and being unable to suck water, so cold protection measures should be taken: 1) horizontal pipelines are buried underground at a depth of more than 30cm; 2) in winter, to prevent the residual liquid in the pump from freezing, the drain screw should be unscrewed early to drain the water in the pump. Note: do not cover the motor or pump with flammable materials for antifreeze, so as not to cause a fire.

Reuse after the pump has been stored for a long time: if the motor does not run when the power is turned on, it is because the dirt in the pump has solidified or adhered; at this time, the power supply should be cut off, a screwdriver should be used to engage the slot at the tail of the motor, and the screwdriver turned to drive the water pump to rotate; it is recommended to turn at least 15 turns; after turning, if the pump shaft rotates smoothly without jamming, it can be put back into use. Note: a drainage ditch around the pump must be set up properly to form natural drainage, so as to prevent losses caused by water leakage when using, maintaining and replacing the water pump (especially in places such as basements, kitchens and stairs).

Troubleshooting

Motor Does Not Run

Overheat protector activated → Wait 20-30 minutes until the motor cools to within the allowable temperature range, and the motor will restart; if it still does not run after the motor cools, please contact the dealer.

Poor contact of the power cord → Insert the plug firmly.

Power cord broken → Replace the power cord.

Motor fault → For motor repair, please contact the dealer.

Voltage too low → Ask the power company to solve it.

Pump Leaks Water

Water leakage at the seal → Tighten the installation screws at the seal.

Water leakage at the shaft seal → Replace the sealing ring.

Motor Runs but No Water Comes Out

There is no water in the pipeline → Replenish water in the pipeline.

Air exists in the pipeline → Discharge the air in the pipeline.

Air enters the suction pipe → Check whether the seal at the piping connection is intact.

Motor Runs but the Water Volume Is Very Small

The outlet valve is not opened → Open the valve.

The filter is blocked → Clean the filter.

The pump capacity is too small → Add another pump or replace it with a larger-capacity pump.

Air remains in the pipeline → Discharge the air in the pipeline.

Warranty Card

Dear user: Thank you very much for purchasing a burks product, and we sincerely wish you more happiness and leisure from it. Now please read and fill in the warranty card carefully, because during the use of this product, you will receive reasonable and reliable guarantee and enjoy better service. Warranty card filling items: pump model, production batch number, pump purchase date, user name, address, telephone, stamp (stamp of the sales store). Please keep this warranty card properly as a maintenance certificate; the warranty time of the purchased product is one year; under normal use and maintenance, faults caused by quality problems of the product itself, verified to be true, will be provided with free maintenance and replacement of parts by our company. Product damage caused by the following circumstances and human factors is not within the scope of warranty: A. Products that have been disassembled and repaired without authorization or whose product parts have been replaced without authorization; B. Products with obvious collision phenomena or some wear phenomena on the product appearance; C. Product damage caused by incorrect installation or illegal operation; D. Product damage caused by natural disasters and force majeure factors (examples: earthquake, flood, freezing, lightning strike, etc.). burks reserves the right of final interpretation of the after-sales service terms.

burks constantly improves and innovates products; if the product appearance and technical parameters change, the changed product appearance and technical parameters shall prevail, and burks reserves the right to make changes.