Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

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    Constant pressure and variable frequency water supply equipment series BH
    Constant pressure and variable frequency water supply equipment series BH
    Constant pressure and variable frequency water supply equipment series BH
    Constant pressure and variable frequency water supply equipment series BH
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    • Constant pressure and variable frequency water supply equipment series BH
    • Constant pressure and variable frequency water supply equipment series BH
    • Constant pressure and variable frequency water supply equipment series BH
    • Constant pressure and variable frequency water supply equipment series BH

    Category:

    Constant Pressure Water Supply Equipment

    Keywords:

    Pump

    Water supply pump

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    Constant pressure and variable frequency water supply equipment series BH

    Flow: 0-2000m³/h

    Manometric height: 1-300m

    Price: 49,600-507,000

     

    The use of frequency converters to achieve a constant pressure water supply, compared to the use of control valves to achieve a constant pressure water supply, has a very significant energy-saving effect (it can be calculated according to the specific situation).

    +86 0731-88192288

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    info@cipump.com

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    Product Description Product Specifications Why Choose Us? FAQ

    Product description

    The constant pressure water supply equipment with variable frequency from the BH series uses variable frequency speed regulation to achieve constant pressure water supply. Compared to using control valves to achieve constant pressure water supply, the energy-saving effect is very noticeable (it can be calculated according to the specific situation).

    Water supply pump is an essential solution for homes, industries, and agricultural applications, providing reliable water transfer and consistent pressure. Engineered for durability and efficiency, it ensures smooth water flow, reduces energy consumption, and minimizes maintenance needs. Suitable for residential water systems, irrigation, and industrial processes, the water supply pump addresses customer pain points such as low water pressure, frequent breakdowns, and high operating costs. Its robust design guarantees long-term performance, making it a dependable choice for various water supply needs.

    Product parameters

    　　In general, when a frequency converter controls an electric motor, it is only necessary for the capacity of the motor assigned to the converter to match the actual capacity of the motor. When a converter controls two motors simultaneously, in principle, the capacity assigned to the converter should be equal to the sum of the capacities of both motors. However, if the water consumption at maximum load differs significantly from the supply at full speed of the two pumps, it may be considered to adequately reduce the capacity of the converter, but sufficient capacity must be left.

    　　Although the working current of the motor is lower when the pump operates at low speed, if the water consumption of the user varies frequently, the motor will be in frequent states of acceleration and deceleration, and the current during these changes may slightly exceed the nominal current of the motor, causing overheating. Therefore, thermal protection of the motor is necessary. For the accumulated temperature increase due to these frequent accelerations and decelerations, the electronic thermal protection function within the converter is difficult to protect effectively, so a thermal relay should be used for the thermal protection of the motor.

    　　Regarding the configuration of main functions, the maximum frequency should be set as the nominal frequency of the motor for the maximum working frequency of the converter. When using a PID controller, the acceleration and deceleration time should be configured as short as possible so as not to affect the dynamic response process determined by the PID controller. If the converter has an integrated PID function, as long as the PID function is activated in the configuration, the set acceleration and deceleration times will be automatically invalidated.

    Features of constant pressure water supply equipment with BH series frequency converter:

    　　1. It has functions for overpressure, low pressure, overload, short circuit, phase loss, and low liquid level.

    　　2. High regulation accuracy, generally can reach 0.01MPa, keeping the system pressure always constant at the set value.

    　　3. Simple and convenient operation, with automatic fault storage and fault visualization. The pressure can be set directly from the keyboard.

    　　4. Advantages of high efficiency and energy saving; when used together with a pressure tank, the effect is better, with an energy saving rate of 20% to 50%.

    　　5. Timed switching function of dual pump. Control one in use and another on standby.

    　　6. Compact structure, takes up little space and is easy to maintain.

    7. Balanced start, the starting current can be limited within the nominal current, thus avoiding impact on the power grid during startup;

    　　8. Due to the reduction of the average speed of the pump, the service life of the pump and valves can be prolonged;

    　　9. Can eliminate the water hammer effect during startup and shutdown;

    Application forms of constant pressure water supply equipment with BH series frequency converter:

    　　Generally, in a water supply system, several common pumps are installed; when the flow is large, all pumps operate; when the flow is small, one or two pumps are turned on. When using constant pressure water supply equipment with a frequency converter, there are two methods: one is that all pumps share a converter; the other is that each pump has its own converter. In the second method, according to the pressure feedback signal, the output frequency of the converter is automatically adjusted through PID calculation to change the motor speed and maintain constant pressure in the network, forming a simple closed loop but with high cost. The first method is lower cost and with no inferior performance, but the control program is more complex and is the future direction. Our company has developed the constant pressure water supply system with ZKBH series frequency converter that can control any number of motors with a single converter.

    Application areas of constant pressure water supply equipment with BH series frequency converter:

    　　Irrigation: such as parks, recreational areas, orchards, farms, etc.

    　　Manufacturing industry: such as production, washing facilities, food industry, factories.

    　　Water for residential use: such as high-rise buildings, residential communities, villas, etc.

    　　Public places: such as hospitals, schools, stadiums, golf courses, airports.

    　　Commercial buildings: such as hotels, offices, large department stores, large saunas, etc.
     

    Kind advice: Please consult the performance parameters directly on the pump selection page.

    Changsha Zhonglian Pump Industry Co., Ltd.

    Why Choose Us?

    Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.

    Changsha Zhonglian Pump Industry Co., Ltd.
    Changsha Zhonglian Pump Industry Co., Ltd.

    FAQ

    Q

    What products do you mainly produce?

    A

    Zoomlion Pump Industry manufactures various large industrial centrifugal pumps. The main products include: self-balancing multistage pumps, multistage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condenser pumps, and more.

    Q

    Can you help me choose a model?

    A

    Of course! If the water pump model is not selected accurately, it can cause significant problems. After you take it back, it might be either too small to meet the usage requirements or too large, resulting in higher electricity and fuel costs, increasing the operating expenses.

    Q

    Why is the price quotation so slow?

    A

    Because centrifugal pumps are non-standard custom products with many models and a wide price range. Even for the same model, the price varies greatly depending on the materials and configurations used. Taking the most common pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clearly confirm the relevant information to provide you with an accurate price. Normally, if you provide comprehensive information, we can quote within 5 minutes.

    Q

    What information should I provide when I need a quote?

    A

    Usually, if you want to get an accurate quote, it is recommended that you provide us with the following information: pump flow rate, head, on-site operating voltage, frequency, temperature of the conveyed liquid, pH value, solid particle content, on-site installation conditions (horizontal or vertical installation), and other related details. If you are not very familiar with these, it’s okay; our sales manager will assist you in determining them.

    Q

    Do you have centrifugal pumps in stock?

    A

    There are many models and configurations of centrifugal pumps. Except for a small number of commonly used standard models that are in stock, the vast majority of models and configurations are not stocked and are customized products. We need to first select the pump based on your site conditions such as flow rate, head, medium temperature, pH value, and installation conditions. After determining the pump model and configuration, we can then place an order with the workshop for production.

    Q

    What is your usual delivery time?

    A

    Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。

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