Changsha Zhonglian Pump Industry Co., Ltd.

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Having 26 series -312 varieties - over 1000 pump models

Focused on water pump research and development manufacturing for 36 years

Free training for operation and maintenance personnel/free installation guidance/free provision of installation drawings

Self-balancing multistage pump

Multistage pump

Coal Mine Safety Certified Multi-stage Pump

Vertical multistage pump

Integrated pump station

Vacuum pump

Fire pump

Constant-pressure water supply equipment

Other pumps

Genuine accessories

Towerless water supply equipment

Flow rate: 20–50,000 m³/h

Head: 10-300m

Price: 29,500–305,000

The term "towerless water supply equipment" is a broad designation that also encompasses negative-pressure-free water supply systems and variable-frequency constant-pressure water supply systems. These systems do not require the construction of water towers. Thanks to their advantages—such as low cost, small footprint, excellent energy efficiency, and stable water supply—they are widely used in industrial and commercial enterprises, residential communities, and rural areas for production, domestic, and office water needs.

Hotline:

+86 0731-88632200

classification：

Constant-pressure water supply equipment

keyword：

Horizontal Single-Stage Fire Pump

Product consultation

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

　　The term "towerless water supply equipment" is a broad category that also encompasses negative-pressure-free water supply systems and variable-frequency constant-pressure water supply systems. As the name suggests, this type of equipment does not require a water tower—in fact, the "water tower" referred to here is a high-level water tower, originally constructed of brick. Towerless water supply systems are by no means limited to just variable-frequency water supply equipment. These systems do not necessitate the construction of a water tower, and thanks to their advantages—such as low cost, small footprint, excellent energy efficiency, and stable water supply—they are widely used in industrial and commercial enterprises, residential communities, and rural areas for production, domestic, and office water needs.

Product Parameters

Features of Fully Automatic Towerless Water Supply Equipment

　　 1. Significant economic benefits: By using this equipment, there’s no need to build water towers or install rooftop water tanks. This not only shortens the construction period but also addresses the drawbacks of high project costs. Additionally, it overcomes shortcomings such as large fluctuations in air pressure and frequent pump starts.

　　 2. Rigorous Design: This equipment employs a variable-frequency constant-pressure control system driven by a water pump, ensuring that the pressure at the pipeline outlet remains constant regardless of changes in the system’s water consumption.

　　 3. Reliable Operation: This equipment is equipped with a variable-frequency drive and high-quality domestic pumps, featuring comprehensive protection functions as well as automatic and manual switching capabilities, ensuring highly reliable operation. Additionally, it boasts excellent performance, flexible control modes, and strong anti-interference capability.

　　 4. High Efficiency and Energy Saving: This equipment can adjust the pump speed according to changes in the user’s water consumption, ensuring that the pump always operates within its high-efficiency range. The energy-saving effect is significant—compared to constant-speed pumps, it can save up to 35% of electricity.

　　 5. Simple Operation: The “Water Supply Equipment Promotion Center” always stays at the forefront of technological advancements in water supply equipment. The new-generation water supply equipment features fully automatic control, PID regulation, keyboard operation, and a human-machine interface (displaying text and numbers). Operators only need to switch the power control cabinet’s circuit breaker to achieve the desired operating conditions, enabling fully automated, unattended operation.

　　 6. Comprehensive protection features: Equipped with perfect automatic protection functions against overload, short circuit, overvoltage, undervoltage, phase failure, overcurrent, short circuit, and water shortage. In case of abnormalities, it can provide signal alarms, self-checks, and fault diagnostics.

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

　　 8. Extend the service life of pumps and motors: The system reliably achieves soft starting for multiple pump units, thereby eliminating inrush currents on both the power grid and pipeline network. Moreover, by rotating the operation among different units, the service life of both pumps and motors is significantly extended.

Application scope of fully automatic towerless water supply

　　1. Domestic water supply for high-rise buildings with swimming pools, hotels, schools, urban residential communities, enterprises and institutions, and rural areas undergoing new rural development.

　　2. Domestic or production water used in factories and industrial/mining enterprises.

　　3. Water supply and drainage services for various types of water plants, water supply stations, sewage and wastewater treatment plants, agricultural irrigation and drainage stations, and more.

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

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

　　6. Constant-pressure oil transportation in oilfield pipelines, oil storage facilities, and gas stations.

Working Principle and Advantages of Fully Automatic Towerless Water Supply Systems

When the towerless water supply equipment is put into operation, water from the municipal water supply network flows into the constant-flow buffer tank. Air inside the tank is expelled through the vacuum eliminator; once the tank is fully filled with water, the vacuum eliminator automatically shuts off. When the pressure in the municipal water supply network can meet the water demand, the system directly supplies water to the user network via a bypass check valve. However, when the pressure in the municipal water supply network fails to meet the water demand, the system’s pressure signal is fed back to the frequency converter controller by a remote pressure gauge, causing the pump to start and automatically adjusting its speed according to the actual water consumption to maintain constant pressure. If the operating pump reaches its rated frequency speed, another pump will be started and operated at variable frequency. During water supply, if the volume of water in the municipal network exceeds the pump’s flow rate, the system maintains normal water supply. During peak water usage periods, if the volume of water in the municipal network falls below the small pump’s flow rate, the water stored in the constant-flow buffer tank can still provide adequate supplementary supply. At this time, air enters the buffer tank through the vacuum eliminator, breaking the vacuum inside the tank and ensuring that the municipal water supply network does not experience negative pressure. After the peak water usage period ends, the system returns to its normal water supply mode. When the municipal water supply network experiences a water outage, causing the liquid level in the constant-flow buffer tank to continuously drop, the liquid-level detector sends a signal back to the frequency converter controller, prompting the pump to automatically shut down and protecting the pump unit. During nighttime low-flow water supply periods, when the pressure in the municipal water supply network cannot meet the required standards, the pressure tank can store and release energy, thereby avoiding frequent pump starts and stops.

　　1. Fully automatic towerless water supply equipment—no need for dedicated personnel management, hassle-free and convenient. It replaces the construction of water towers and elevated water tanks, enabling fully automatic water supply. Even after maintenance or power outages, it can continue to provide water normally for a certain period of time without interruption.

　　2. The water supply pressure of the fully automatic, towerless water supply equipment can be adjusted freely to ensure customers achieve their desired usage results.

　　3. It employs cutting-edge anti-corrosion technology, making the water quality resistant to contamination and effectively inhibiting the growth of bacteria and organisms. It also features earthquake resistance and lightning protection, and is environmentally friendly with zero pollution.

　　4. No water tower is required, resulting in low investment and minimal land use. It features automatic water-gas regulation and self-operating energy-saving functions, as well as automatic connection to the municipal water supply. Even after a power outage, water supply can still be maintained. After commissioning, it requires no supervision for several years.

　　For performance parameters, please directly refer to the pump selection page.

Why choose us?

Changsha Zhonghlian Pump Industry Co., Ltd. was founded in 1989 and was independently established after the restructuring of Changsha Water Pump Factory. It is a comprehensive national high-tech enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Equity Exchange on December 31, 2019, with the abbreviation "Zhonghlian Pump Industry" and the equity code: 600275HN. It is currently a key backbone enterprise in China's centrifugal pump industry and one of the major professional manufacturers of multi-stage pumps in the country. The headquarters is located in Changsha City, Hunan Province, a historical and cultural city in China.

41000 m²

Square meters of land area

100 %

100% factory pass rate

41000 m²

Square meters of land area

100 %

100% factory pass rate

What is your typical delivery time?

Models in stock can be shipped the next day at the latest. All others are custom-made, with lead times generally ranging from 7 to 90 days depending on the product size and project specifics. Please contact our sales manager for details: 0731-88632200 。

Do you have centrifugal pumps in stock?

Centrifugal pumps come in numerous models and configurations. Except for a small number of high-volume, standard models that are in stock, the vast majority are not stocked and are customized products. We need to select a pump based on your site's flow rate, head, media temperature, pH value, and installation conditions, etc., to determine the pump model and configuration before we can submit an order to the factory for production.

What information should I provide when requesting a quote?

Generally, to obtain an accurate quotation, we recommend providing us with the following information: pump flow rate, head, on-site operating voltage and frequency, temperature, pH value, and solid particle content of the fluid being conveyed, and on-site installation conditions (horizontal or vertical installation), etc.

If you are not sure, don't worry, our business managers will assist you in determining this.

What products do you mainly produce?

Zhonglian Pump Industry manufactures various large industrial centrifugal pumps. Main products include: self-balancing multi-stage pumps, multi-stage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condensate pumps, etc.

Could you help me with the selection?

Certainly! If the water pump model is not selected accurately, there will be big problems. If you choose a smaller one, it won't meet your needs; if you choose a larger one, it will waste electricity and fuel, increasing your costs.

Why is it so slow to get a price quote?

Because centrifugal pumps are non-standard customized products with many models, the price range is also very large. Even for the same model, the price difference is also very large due to different materials and configurations. Taking the most common water 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 clarify the relevant information to give you an accurate price. Normally, if you provide relatively comprehensive information, we can quote within 5 minutes.

Variable-frequency constant-pressure secondary water supply equipment

None

Variable-frequency constant-pressure secondary water supply equipment

None

+86 0731-88632200

Export Trade/Technical Support:

+86 153-4831-2290

Head Office Email:

zoomlian@yeah.net

No. 210, Huanbao Zhong Road, Yuhua District, Changsha City, Hunan Province, Leowoju Wisdom Valley Building B, 8th Floor

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Hot Products

Self-balancing multistage pump

Multistage pump

Coal Mine Safety Certified Multi-stage Pump

Vertical multistage pump

Integrated pump station

Vacuum pump

Fire pump

Constant-pressure water supply equipment

Other pumps

Genuine accessories

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