The burks BPV, BPN, BPE, BPNE, BPI, BPIE stainless steel multistage pump

burks BPV/BPN Series Vertical Multistage Centrifugal Pumps

Model Designation

Example: BPV 5 8, where BPV is the series code, 5 is the rated flow (m³/h), and 8 is the number of impeller stages. The series code covers the following types: BPV vertical multistage pump, MPC-BPV back-mounted inverter pump, COR-BPV non-negative-pressure inverter unit, BPN all-stainless-steel vertical multistage pump, MPC-BPN back-mounted inverter pump, and COR-BPN non-negative-pressure inverter unit.

Before First Use

Before using your equipment for the first time, please read and follow this original instruction manual, and keep it in a safe place for future use or for other owners.
● If there is any transport damage, please notify the retailer immediately.
● When opening the product packaging, confirm that no accessories are missing and that the contents of the box are not damaged.

Environmental Protection

The packaging materials can be recycled. Please do not dispose of the packaging materials with ordinary waste; arrange for them to be recycled properly. Old equipment contains valuable recyclable materials and should be recycled. Please dispose of your old equipment through an appropriate collection system.

Applications

burks multistage pumps are mainly used to convey various media from tap water to industrial liquids, and are suitable for different temperature, flow and pressure ranges. BPV and BPN pumps are suitable for the following applications: raw water supply, irrigation and spraying, industrial liquid transfer, water supply boosting, fountain applications, marine applications, and water treatment applications.

Pumped Liquids

Thin, non-explosive liquids containing no solid particles or fibres. The medium must not react chemically with the pump materials. When the density or viscosity of the pumped medium is greater than that of water, a motor with correspondingly greater output power must be used.

Features

Difference between the types: BPV is used for liquid transfer, circulation and boosting of hot and cold circulating water and similar applications. When the system requires all wetted parts of the pump to be of high-grade stainless steel, BPN must be used.

Operating Conditions

Minimum Inlet Pressure

Calculation of the Minimum Inlet Pressure

H = Pb × 10.2 - NPSH - Hf - Hv - Hs, where: Pb = the atmospheric pressure shown by the barometer (the atmospheric pressure may be preset to 1 bar); in a closed system, Pb is the system pressure in the barometer. NPSH = net positive suction head. Hf = the friction loss of the liquid in the pump suction line. Hv = vapour pressure, tm = liquid temperature. Hs = safety margin = minimum 0.5 metres. If the calculated H is positive, it means the pump can draw up a height of H metres on the suction side; if the calculated H is negative, the pump inlet must have a positive pressure of at least H metres. During operation, the pressure must be equal to the calculated H.

Maximum Inlet Pressure

The pump inlet pressure plus the pump head at closed valve must be lower than the maximum allowable pressure.

Minimum Flow

Due to the risk of overheating, the pump should not operate at the minimum flow condition.

Series and Models

This series comprises 18 rated-flow series. The speed marked on the performance curves of each series is: 2900rpm for BPV/BPN 1 to 85, and 2950rpm for BPV/BPN 120, 150 and 200. The flow-head performance tables (performance data and matched motor power), installation dimensions and weights of each model are large per-model tables and are not reproduced in this text; for detailed data, see the user manual / selection catalogue. The model composition of each series is shown in the table below, with 317 models in total across the series (counted from the rows printed in the performance table of each series).

Performance Curves

The following are examples of the head-flow performance curves of the BPV/BPN 1, BPV/BPN 20 and BPV/BPN 32 series; for the performance curves of the other series, see the user manual.

The efficiency (Eta), shaft power (P2) and NPSH curves of BPV/BPN 1 (see the installation dimensions page of this series):

Installation Dimensions

The following are examples of the installation dimension drawings of BPV/BPN 1 and BPV/BPN 32. The B1, B2, B1+B2, D1 and D2 dimensions and the weight of each model are given in large per-model tables; for detailed data, see the user manual. The external dimensions of single-phase motors and explosion-proof motors vary; please consult burks for details.

Electrical Connection

In accordance with local regulations, the electrical wiring must be carried out by a qualified electrical technician. Before removing the terminal box, and before dismantling the pump, make sure that the power supply is completely switched off. The pump must be connected to an external switch, and the minimum contact gap between the poles of such switches must be at least 3mm. The operating voltage and frequency of the pump are marked on the motor nameplate. Make sure that the motor fully matches the power supply to be used. Three-phase motors must be connected to a motor starter.
● If necessary, the coupling guard can be removed, but the coupling must never be removed.
● Remove the bolts connecting the motor and the pump.
● Turn the motor to the required position.
● Tighten the motor fixing bolts.
● Refit the coupling guard.
The electrical connection should be made according to the wiring diagram on the terminal box.

Lightning Protection

burks recommends fitting additional lightning protection devices in order to reduce the risk of the motor being burnt out by lightning strikes.

Inverter Installation

All three-phase motors supplied by burks can be connected to an inverter. Depending on the type of inverter, the instantaneous noise of the motor may increase, and the motor may also be subjected to unfavourably high peak voltages. A peak voltage of not more than 850V is recommended. To prevent increased instantaneous noise and voltage peaks in the above cases, an LC filter can be installed between the inverter and the motor. For other types of motors supplied by burks, please contact burks or your supplier.

Installation

Fixing: the pump must be bolted through the flange holes or the pump base holes and fixed securely on a reliable, solid foundation. When installing the pump, the following procedure must be strictly followed to avoid damaging the pump.

Installation steps:
● The arrow on the pump body indicates the direction of liquid flow through the pump.
● The pump can be installed horizontally or vertically, but it must be ensured that cooling air can flow freely to the motor fan. Note that the motor must never be installed upside down on the ground.
● To reduce noise, it is recommended to fit expansion joints at the pump inlet and outlet, or to fit a vibration-damping base between the pump and the foundation. Gate valves should be installed on both sides of the pump so that the system does not drain when the pump needs cleaning, repair or replacement of parts. Always protect the pump properly; fitting a check valve (foot valve) can prevent damage to the pump from backflow.
● Install the pipework so as to prevent air from accumulating in the pipes, especially at the suction side of the pump.
● Under the following installation conditions: the discharge pipe slopes away from the pump; there is a possibility of a siphon effect. In the above cases, a vacuum relief valve must be installed near the pump outlet.

Starting Instructions

Note: do not start the pump before it has been filled with liquid and vented. If the pump runs dry, the bearings and the shaft end seal in the pump will be destroyed. Please note the direction of the discharge outlet, and take care to ensure that the discharged liquid will not injure people or damage the motor or other components. When installing in hot water, pay particular attention to the danger of being scalded by hot water.

Inspection

Before starting the pump, make sure that all power supplies connected to the pump are completely switched off and that they cannot be switched on accidentally. The pump bearings and shaft seal are maintenance-free. If the pump is to be drained and left out of use for a long period, remove one coupling guard of the pump and drip a few drops of silicone resin oil onto the shaft between the pump end and the coupling. This will effectively prevent the shaft seal from sticking.

Starting Procedure

● Close the pump outlet valve and open the valve on the pump suction side.
● From the motor fan cover end, observe whether the direction of rotation of the pump is correct.
● Start the pump and check the direction of rotation.
● Open the vent valve at the top of the pump to vent air. At the same time, open the outlet valve slightly.
● Continue venting, and at the same time open the outlet valve further.
● When liquid flows out of the vent valve steadily, close the vent valve. Now open the outlet valve fully.

Motor Bearings

Motors without an oil filling hole are maintenance-free. Motors with an oil filling hole should be lubricated with high-temperature-resistant lithium-based grease. If the pump is used seasonally (motor idle time exceeding 6 months), it is recommended to lubricate the motor when the pump stops working.

Frost Protection

● Pumps that are not used during frosty periods should be drained of water to avoid damage; damage to the pump caused by low temperatures is not covered by the burks warranty.
● Take care to ensure that water running from the pump does not cause personal injury or damage to the motor or other components.
● Before using the pump again, do not overtighten the drain screw.

Service

Note: if the pump is used for liquids that are harmful to health or toxic, the pump will be contaminated at the same time. If burks is asked to service a pump, full details of the liquid pumped must be provided to burks before the pump is returned to the service station; otherwise burks may refuse to service the pump. All costs during the return of the pump for repair shall be borne by the customer. However, if the pump is used for liquids harmful to health or toxic, any service request (no matter who carries it out) must include full details of the liquid pumped.

Transport

Note: risk of injury and damage!
● Pay attention to the weight of the equipment during transport.
● When transporting by vehicle, ensure in accordance with the applicable guidelines that the equipment cannot slip or overturn.
Transport by crane:
● Fix the lifting device to the middle of the crane loading beam.
Danger: risk of injury from the equipment falling.
● Observe the local accident prevention regulations and safety instructions.
● Before each use of the crane for transport, check whether the crane loading equipment is damaged.
● Before each lifting operation, check whether the lifting device is damaged.
● Only lift the machine on the equipment intended for crane loading.
● Do not use lifting chains.
● Secure the lifting device against unintentional unhooking of the load.
● Do not convey objects on the machine during lifting.
● Only personnel trained in crane operation may use the crane for transport.
● Do not stand under the load.
● Make sure that nobody stays in the danger zone of the crane.
● Do not leave the equipment hanging on the crane unattended.

Warnings

● burks accepts no responsibility and no liability for any personal injury, equipment damage or other property loss caused by failure to follow the instructions marked in the operating instructions.
● Installers and operators must observe the local safety rules. This product must be installed and maintained by professional personnel.
● The equipment must be fitted with a leakage protection device for safety.
● During installation and maintenance, the power supply to the equipment should be cut off.
● If the power cable is damaged, it must be replaced by professional personnel.
● This equipment must not be touched or used by children or non-professional personnel; burks accepts no responsibility for any consequences arising therefrom.

Troubleshooting

1. The motor does not start when switched on
Power failure → Connect the power supply
Fuse blown → Replace the fuse
Motor starter overload protection failed → Reset the motor protector
Thermal protector protection failed → Reset the thermal protector
The main contactor of the motor starter is not connected, or the electromagnetic coil is broken → Replace the contactor or the electromagnetic coil
Control circuit damaged → Repair the control circuit
Motor damaged → Repair the motor

2. The motor starter overload trips when the power is switched on
Fuse / automatic control circuit broken → Replace the fuse
The contact switch of the motor starter has overload failure → Replace the contact switch of the motor starter
Connection wires loose or defective → Tighten or replace the connection wires
Motor coil damaged → Replace the motor
The pump is mechanically blocked → Clear the mechanical blockage of the pump
Overload setting too low → Set the motor starter properly

3. The motor starter trips occasionally
Overload setting too low → Set the motor starter properly
Voltage too low during peak electricity consumption → Check the power supply

4. The motor starter starts normally, but the pump does not run
Cause is the same as items a), b), d), e) and f) in item 1 → Apply the corresponding measures in item 1

5. The pump flow is uneven
The pump inlet pressure is too low (cavitation) → Check the pump inlet conditions
The suction pipe / pump is partly blocked by debris → Clean the pump or the inlet pipe
Air has entered the pump → Check the pump suction conditions

6. The pump runs but delivers no water
The suction pipe / pump is partly blocked by debris → Clean the pump or the inlet pipe
The foot valve or check valve should be closed but is blocked → Repair the foot valve or check valve
The suction pipe is leaking → Repair the suction pipe
Air has entered the suction pipe or the pump → Check the pump inlet conditions
The direction of rotation of the motor is incorrect → Change the direction of rotation of the motor

7. The pump runs backwards when switched off
The suction pipe is leaking → Repair the suction pipe
Foot valve or check valve faulty → Repair the foot valve or check valve

8. Shaft seal leakage
Shaft seal faulty → Replace the shaft seal

9. Excessive noise
The pump is cavitating → Check the pump inlet conditions
The impeller or pump shaft does not rotate freely (friction resistance) → Adjust or replace the impeller and pump shaft
Bearing worn or damaged → Replace the bearing

Warranty Card

Dear user: thank you very much for purchasing a burks water pump, and we sincerely wish you more joy and comfort from it. Please read and fill in the warranty card carefully, because during the use of this product you will thereby obtain reasonable and reliable assurance and enjoy better service. Warranty card fields: pump type, production batch number, date of purchase, user name, address, telephone, and seal (sales shop stamp).

Warranty certificate of the Sino-foreign joint venture burks:
1. This is to certify that the product listed below is covered by our company's warranty and has passed strict quality control and testing under our company's quality management system.
2. Please keep this certificate properly; it will not be reissued if lost.
3. From the date of purchase, faults of this product under normal use that are not caused by human factors are covered by a one-year warranty.
4. Beyond the period specified above, if parts need to be replaced, the customer will be charged the cost of the parts and a service fee.
5. Our company continuously improves its products; if parts need to be replaced during the warranty period, our company may replace them with improved parts.
6. Our company is not responsible for warranty for faults caused by force majeure factors (such as natural disasters including low temperatures, earthquakes and floods) or by human factors of the user.
7. This product should be installed and used by professional personnel; otherwise our company is not responsible for warranty for any fault caused by improper installation.
8. Please test-run and inspect the product immediately after delivery and acceptance; if there is any objection to the product quality, please raise it within one week, otherwise our company will not be responsible.

burks continuously improves and innovates its 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.