Grundfos variable frequency booster pump

Brand Introduction:

Grundfos was founded by the late Mr. Paul Du Yesen in 1945. At first, he named his company "Bian Angbu Die Casting Machinery Factory". After several name changes, the company did not use the current "Grundfos" until 1967. Grundfos is one of the leaders in the global pump industry, with an annual production capacity of nearly 16 million units. Circulating pumps for heating and air conditioning, centrifugal pumps and metering pumps for industrial, water supply and sewage treatment are its main products. Circulating pumps are used in heating, ventilation, and air conditioning systems in buildings such as homes, offices, and hotel buildings. Industrial pumps are mainly used in factory processes and facility maintenance, as well as supporting equipment for various OEM (original equipment manufacturing) products. The values of Grundfos can be summarized as: responsibility vision innovation. Due to its sense of responsibility, foresight, and focus on creating unprecedented solutions and concepts, it has become a leading global water pump manufacturer. In order to maintain its leading position, the company will focus on scientific research and development. In 2007, Grundfos Group invested a total of 628 million Danish kroner in this area. The Grundfos Business Development Center (BDC) located in Bianangbu is committed to continuously expanding the company's existing business areas and improving product quality to make water pumps more energy-efficient.

Characteristics of Grundfos CM Pump

CM pump is a non self-priming horizontal end suction multi-stage centrifugal pump.

The CM series pumps come in three material forms:

Cast iron (EN-GJL-200)

Stainless steel (EN 1.4301/AISI 304)

Stainless steel (EN 1.4401/AISI 316)

impeller，The pump chamber and water injection plug are made of stainless steel (EN 1.4301/AISI 304).

The pump shaft is made of stainless steel (EN 1.4057/AISI431).

The CM pump consists of two main parts: the motor and the pump unit.

The motor of the CM pump is a Grundfos motor designed according to EN standards.

The pump unit consists of optimized hydraulic components, outer sleeves, various connectors, and other parts.

This type of pump has many advantages:

Compact design that can be used around the world.

High reliability, easy maintenance, wide performance range, and low noise.

Characteristics of Grundfos CR Pump

CR pump is a vertical multi-stage centrifugal pump. Its pipeline structure ensures that the pump can be directly installed in a horizontal pipeline system with the same inlet and outlet lines and the same diameter, making the pump structure and pipeline more compact.

Grundfos CR pumps come in different pump specifications and stages to meet the required flow and pressure.

CR pumps are suitable for a wide range of applications, from transporting drinking water to transporting chemical media. CR pumps can also be used in a wide range of diverse systems, as long as the pump's performance and materials meet specific requirements.

The CR pump consists of two main components: the motor and the pump unit. The motor of the CR pump is a Grundfos motor designed according to European standards.

The pump unit consists of optimized hydraulic components, various connecting parts, an outer cylinder, a pump head, and other components.

According to different conveying media, CR pumps can also provide pump types in different material forms.

The working principle of Grundfos variable frequency booster pump:

The basic working principle of Grundfos variable frequency booster pump is to automatically adjust the number of running water pumps and the speed of one water pump according to changes in user water consumption, so as to maintain a constant outlet pressure of the water pump. When the user's water consumption is less than the output of one water pump, the system operates with a variable frequency speed control system based on the change in water consumption. When the water consumption increases, the pressure in the pipeline system decreases. At this time, the pressure sensor sends the detected signal to the system control center, and through system operation judgment, sends instructions to the variable frequency drive to control the water pump motor, increase the speed to ensure constant system pressure. Conversely, when the water consumption decreases, the speed of the water pump slows down to maintain constant pressure. When the water consumption exceeds the output of one pump, the first pump switches to power frequency operation, and the second pump starts variable frequency speed regulation operation. When the water consumption is less than the output of two pumps, one or both pumps can automatically stop running. Throughout the entire operation process, the system maintains a constant pressure, ensuring that the water pump always operates in the high school area. This not only guarantees constant pressure water supply for users, but also saves electricity. The equipment does not require dedicated operators.

Scope of application of Grundfos variable frequency booster pump:

1. High rise buildings with water pools, hotels, schools, urban residential areas, enterprises and institutions, and rural living water for new rural construction.

2. Domestic or production water for factories, industrial and mining enterprises.

3. Various types of water plants, water supply stations, sewage and wastewater treatment plants, agricultural irrigation and drainage stations, etc.

4. Centralized hot water supply for high-rise buildings, residential areas, and enterprises and institutions.

5. Pressurization of cooling water and circulating water in production and daily life.

6. Constant pressure oil transportation in oil field pipelines, oil depots, gas stations, etc.

7. Pressurization of water for cleaning equipment

8. Boosting of irrigation water for agriculture and landscaping

Product features of Grundfos variable frequency booster pump:

1. Significant economic benefits: By using this equipment, there is no need to build a water tower or a rooftop water tank, which not only reduces the construction period of the project, but also solves the problem of high project cost. It also overcomes the shortcomings of large air pressure fluctuations and frequent pump start-up.

2. Rigorous design: The equipment adopts variable frequency and constant pressure control of the water pump, which can maintain a constant outlet pressure of the pipeline regardless of changes in the system's water consumption.

3. Reliable operation: The equipment adopts a frequency converter and a Grundfos CM/CR series water pump, which has complete protection functions and automatic/manual conversion functions, making the operation very reliable. And it has good performance, flexible control methods, and strong anti-interference ability.

4. Energy saving: This device can adjust the speed of the water pump according to the changes in the user's water consumption, so that the water pump always works in the high-efficiency zone, and the energy-saving effect is obvious. It can save 35% of electricity compared to a constant speed water pump.

5. Easy to operate: The device adopts fully automatic control, PID regulation, keyboard operation, and human-machine interface (text, number) display. Operators only need to switch the electrical control cabinet switch to achieve the desired operating conditions for users, achieving fully automatic unmanned operation.

6. Complete protection functions: It has automatic protection functions such as overload, short circuit, overvoltage, undervoltage, phase loss, overcurrent, short circuit, and water shortage. Can perform signal alarm, self check, fault diagnosis, etc. in abnormal situations.

7. Small footprint and easy installation: The entire equipment only has one set of water supply control cabinet and water pump unit, making installation very simple and convenient.

8. Extending the service life of water pumps and motors: It can reliably achieve soft start for multiple pump units, avoiding impact on the power grid and pipeline network, and rotating alternately, greatly extending the service life of water pumps and motors.