Stainless Steel Magnetic Pump Model CQL

Safety Notice

To avoid accident or damage, please be sure to read the Safety Notice carefully before use of the pump. 

Be sure to follow the safety instructions in this section. The Operating Instructions is very important and may prevent the pump operator or other people from injury or mitigate property damage. 

1.Safety Warnings

1)Hazard of magnetic field: The pump driven by magnetic force will generate a very powerful magnetic field that will cause adverse impact to those who wear electronic medical devices (e.g. electronic pacemaker).

2)Be sure to cut off the power supply before repair or other work. When there is someone repairing the pump, take protective measures to prevent other operators from switching on the power supply by mistake. In noisy or dark environment, place a clear sign beside the power switch to warn others. Switching on the power supply by mistake during maintenance may cause severe accident or even human death. Every person shall take special care.

3)Please wear safety goggles, protective gloves, protective clothes and other necessary protective equipment when replacing the pipe system or removing or assembling the pump.

4)When lifting the pump, use chain or belt to pass through the lug or motor to keep the pump and motor on level position. Do not stand beneath the lifted pump.

5)To avoid leakage, be sure to perform routine inspection and maintenance of the pump when it is used for trans porting the following dangerous liquids. In the event of leakage, such dangerous liquids (or volatile gas) will cause human death, explosion or fire.

a)Inflammable or explosive liquids;

b)Corrosive or poisonous liquids;

c)Liquids harmful to human body.

2.Safety Cautions

1)The magnetic pump will generate powerful magnetic field. Take care to prevent the strong magnetic force from causing harm to human body (e.g. squeezing your fingers).

2)Avoid idle run: Idle run may heat impeller axle and destroy the mechanical seal due to dry friction, thus resulting in damage to the pump. It is also deemed idle run if the pump works with the inlet and outlet valve closed.

3)Avoid damage due to static charge: Static charges will be generated if the pump is used for transporting the liquids of low conductivity, e.g. ultra-pure water or fluorine-contained inert fluids. This will cause electric discharge and damage to the pump. Measures shall be taken to prevent the generation of static charges or other measures shall be taken to lead the static charges.

4)The pump maintenance personnel shall have professional knowledge and operating experiences.

5)Magnetic pump made of special materials shall be used for designated working conditions only; otherwise there is no way to ensure the normal performance and service life of the pump, or it may even cause accident.

6)Requirements for site ventilation: If the pump is used for transporting the volatile poisonous gas, safety measures, e.g. ventilation equipment, must be taken to avoid liquid leakage in case of emergency.

7)Avoid liquid leakage: To prevent the liquid from flowing directly into the ground, protective measures shall be taken against the leakage caused by emergency accident or pipe damage.

8)Select the electromagnetic switch according to the motor specification, e.g. rated voltage and rated power.

9)If the pump is installed outdoor, protective measures must be taken for the electric circuits, thus to prevent the water from flowing into the switch.

10)The electromagnetic switch and buttons shall be installed safely and away from the pump.

Introduction

1.Use and Features

3.Model Definition

1)Pressure limit: The pressure limit is 1.6MPa. Take care that the output pressure of the pump shall not exceed the pressure limit.

2)Working temperature: -20~＜100℃; Variance of ambient temperature: 0~40℃; Variance of ambient humidity: 35~85%RH

3)Never use the pump for transporting the medium that contains tiny particles and crystals. Never use the pump for transporting the medium that may generate plentiful bubbles.

4)Impact of liquid viscosity to the pump performance: The pump performance varies with the

liquid viscosity.

6.Structure and Parts Name

                                  Structure of Stainless Steel Magnetic Pump, Model CQL

1.Key Points of Installation

1)The pump shall be installed and fixed on solid foundation free from the impact of mechanical vibrations.

2)The foundation shall weigh three (3) times the equipment or higher, and be larger than the seat.

3)For easy repair and maintenance, adequate space shall be left around the pump.

4)Place the pump unit on the foundation. Gaskets shall be paved between the seat and foundation.

2.General Requirements for Pump Foundation

1)Generally, the size of pump foundation shall be according to the size of pump seat. The seat edge shall be 100-120mm from the foundation edge. The foundation surface shall be 200mm higher than the ground. Square holes 100X100 shall be provided for anchor bolts, with the depth to be determined according to the bolt length.

2)The pump foundation must be able to withstand the highest static load and dynamic load of the pump and pipes. There shall be no damage or subsiding that may affect the pump operation.

3)For rotary pump, the weight of foundation shall be at least three (3) times the gross weight of pump.

4)To avoid sympathetic vibration, the ratio of interference frequency to the self-vibration

frequency of foundation and pump system shall be lower than 0.7 or higher than 1.3.

5)The thickness of concrete around the bolt hole and foundation outer surface shall be not less than 75mm.

6)To remove the loose mortar and adhesions on foundation surface, it is needed to remove the surface for 5-20mm thick. Considering the early shrinkage, proper margin shall be kept for grouting.

7)For the foundation requiring secondary grouting, the voids on the surface shall be removed. The surface shall be free of oil dirt or loose layer. The foundation surface where the steel pad is to be placed shall be well leveled for a tolerable error of 2mm/m. 

3.Pipe

1)The pipes into and out of the pump shall be supported. Do not use the pump as the support. The pipe diameter shall be compatible to the pump inlet / outlet size.

2)Ensure that the mounting height of the pump conforms to the NPSH. The pipe loss and medium temperature shall be also considered. To avoid generation of NPSH within pump body, be sure to follow the formula below:

NPSHa ≥ NPSHr + 0.5, in which:

NPSHa: Effective (equipment) NPSH (m)                    NPSHr: Necessary (pump) NPSH (m)

3)The pipe bend shall be as smooth as possible. Minimize the bends and avoid bend at the position close to the pump inlet. Use the shortest pipe as might be.

4)Do not use the protruded pipe or inverted U-pipe. The inlet pipe shall be connected upward per 1/100 gradient.

5)If the pump inlet diameter differs from outer diameter, please use eccentric reducing pipe and make the upper part level. (If connected in reverse, it is possible that the gas inside the pipe cannot be discharged). The liquid drop shall be considered. The suction pipe shall be positioned at an adequate immersed depth. To prevent the foreign particles from entering the pump, filter shall be installed at the inlet. The filtration area shall be 3-4 times larger than the section area of the pipe. The filter shall be cleaned regularly.

6)The outlet pipe must be installed with a valve for regulating the flow and making the pump work at the specified flow, so as to avoid malfunction of the pump due to overflow. A check valve shall be installed to avoid damage by surge when the pump is stopped. The correct sequence of installation shall be as pump check valve gate valve.

7)The pipe must be correctly connected. The sealing gasket between the flanges shall be smooth and not be mal-positioned. If there is leakage on the seal, the pump cannot work normally or the pump might be even damaged. 

4.Installation Schematics

 

1. Control box               2. Upper liquid-level sensor                 3. Lower liquid-level sensor

4. Liquid inlet pipe         5. Inlet valve                                        6. Outlet valve

 

Operation and Maintenance

 

1.Cautions before Use

1)Always prevent the magnetic pump from idle run. The minimum flow of the pump during operation shall be 35% of the design value.

2)If cavitations occur when the pump is running, be sure to stop the pump within one (1) minute.

3)It is suggested to keep the magnetic pump running continuously. Frequent start / stop will result in shortened life of the pump. If you have to use the pump intermittently, the start / stop within 1 hour shall not exceed 5 times.

4)The variance of medium temperature shall be controlled within 40℃. If the temperature rise / drop are too high, it might cause damage to the pump components (e.g. shaft, bearing).

5)If there is sudden power failure when the pump is running, be sure to cut off the power supply immediately and close the outlet valve.

6)Pump noise: ≤95dB

 

2.Start and Operation

1)Before start, fill the pump with the liquid to be transported. With the pipe correctly connected, switch on the power and use the inch start method to check if the pump rotates freely and in correct direction.

2)Close the outlet valve and start the pump (i.e. close the pump to start). Then, adjust the outlet valve to make the pump reach the specified flow.

3)Test run the pump for 5 – 10 minutes. If there is no abnormality, put the pump into normal operation.

4)To stop the pump, firstly close the outlet valve and then disconnect the power supply.

 

3.Repair and Maintenance

1)Check the pump and motor regularly. Replace the easily-damageable components.

2)If the pump is stopped and placed long out of service, the flow passage inside the pump shall be flushed and the power supply shall be disconnected.

3)Always avoid idle run. If the pump is placed outdoor, rainproof measures shall be taken to prevent the motor from burn due to moisture.

 

4.Removal and Assembly

The removal procedures are as follows. The assembly procedures are in reverse.

1)Loosen the bolts fixing the pump and motor to the seat. Pull out the motor.

2)Loosen the bolts fixing the support to pump body. Pull out the pump body and separate the support (connected to outer magnet) from the pump body (impeller and rotor connected to pump cover).

3)Loosen the nuts fixing the impeller and remove the impeller. Turn the pump cover upside down and remove the isolator assembly (The isolator assembly may be directly removed if not fixed by bolt). Remove the rotor.

4)Loosen the bolts fixing the support to bearing box, and separate them. Loosen the screws fixing the outer magnet and separate the outer magnet from pump shaft.

5)Loosen the bolts fixing the bearing gland and remove the bearing box assembly. 

 

5.Service Commitment

1)Long-term supply is ensured for the easily-damageable parts and other components.

2)New model of corrosion-resistant pump and explosion-proof motor may be designed according to the user requirements.

3)We provide technical supports and life-long services for our products.

4)We provide door-to-door commissioning and repair free of charge (The easily-damageable parts are charged per the ex-works price).

 

6. Troubleshooting

 

Fault	Cause	Solution
No liquid pumped	1. There is air in the suction pipe. 2. The suction pipe leaks air. 3.The liquid filled into the pump is insufficient. 4.The suction pipe is blocked by foreign       substances. 5. The pump rotates in wrong direction. 6. The suction height is too high.	1. Refill liquid or exhaust the air. 2. Check the suction pipe. 3.Refill liquid. 4.Clear off the foreign substances. 5. Adjust the rotating direction of the pump. 6. Reduce the mounting height of the pump.
The flow is low	1. Impeller is damaged. 2. The rotating speed is low. 3. The pipe is blocked by foreign substances.	1. Replace the impeller. 2. Check the motor and electric circuit. 3. Clear off the foreign substances.
The power is too high	1. The specific gravity of the medium is too high. 2. Mechanical friction exists.	1. Replace with the motor or pump that has a higher power. 2. Check the position of friction and make repair.
Pump head is low	1. There is air in the medium transported. 2. Impeller is damaged. 3. The rotating speed is low. 4. The viscosity of transported medium is too high.	1. Refill liquids or exhaust the air. 2. Replace the impeller. 3. Check the motor and electric circuit. 4. Reduce the viscosity or add the filling pressure.
The pump has vibration	1. The suction height is too high, thus generating cavitations. 2. Mechanical friction exists.	1. Reduce the mounting height or replace with self-suction pump. 2. Check the position of friction and make repair.

 

 

 

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