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

Fire-fighting booster and pressure-stabilizing water supply equipment

Fire-fighting booster and pressure-stabilizing water supply equipment

Flow rate: 0–5000 m³/h

Head: 1–300 m

Price: 30,800–308,000

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 fire-fighting pressure-stabilizing water supply equipment is a new type of energy-saving water supply device that has been designed, developed, and improved in accordance with the national fire protection standard “Fire Protection Code for High-Rise Civil Buildings” and the Ministry of Public Security’s fire protection standard “Performance Requirements and Test Methods for Fire-Fighting Pressure-Boosting Water Supply Equipment.” This fire-fighting water supply equipment utilizes today’s microcomputer control technology and integrates variable-frequency drives with... Fire pump A high-tech, energy-saving water supply system integrating mechanical and electrical components. The variable-frequency constant-pressure water supply equipment uses the water pressure at the pump’s outlet (or the user’s water flow rate) as the setpoint parameter. A microcomputer automatically controls the output frequency of the frequency converter, thereby adjusting the rotational speed of the pump motor to achieve closed-loop regulation of the water pressure in the user’s pipeline network. This ensures that the water supply system maintains a consistently stable pressure at the preset value: when water consumption increases, the frequency rises, and the pump’s rotational speed accelerates; when water consumption decreases, the frequency falls, and the pump’s rotational speed slows down. In this way, the entire user pipeline network is guaranteed to have sufficient water pressure (consistent with the user’s set pressure) and adequate water volume (which varies according to the user’s actual water usage).

Product Parameters

Composition of Fire-Fighting Booster and Pressure-Stabilizing Water Supply Equipment

　　The fire-fighting water supply system mainly consists of an air pressure tank, a pump, a control cabinet, control instruments, pipeline fittings, and other components. The pump itself is composed of two main parts: the motor and the pump body. The fire-fighting booster series is a constant-pressure water supply equipment designed and manufactured in accordance with national building standard design atlases such as 98S205, specifically for fire protection applications. It can consistently maintain the pressure indicated by the pressure gauge—i.e., the water pressure in the user’s piping network—at the user-set value. This equipment can be used for both general domestic and industrial water supply applications. The composition of the water supply system can take the following forms:

　　1. The fire-fighting pressure-stabilizing water supply equipment is connected to the municipal water network for constant-pressure water supply. When the water supply pressure meets the demand, all pumps will automatically shut down. Otherwise, the constant-pressure water supply equipment will start up and increase the pressure to meet the water usage requirements.

　　2. To eliminate power consumption caused by low or zero-flow water supply, an auxiliary small pump or an auxiliary pressure tank can be added. When the water supply pressure is low, the main pump will automatically shut down, allowing the small pump or pressure tank to take over and operate instead.

　　The pump’s structure includes components such as the pump body, impeller, pump cover, and mechanical seal. The pump and motor are mounted on the same shaft. The axial force of the pump is balanced by a balance ring installed on the impeller. The pump’s inlet and outlet are located on the same horizontal axis and have identical port sizes. The pump is equipped with an installation base for easy mounting and to enhance operational stability.

　　1) Equipment classified by fire water supply system:
　　a. Fire hydrant water supply system fire booster and pressure stabilization water supply equipment; b. Automatic sprinkler fire suppression system fire booster and pressure stabilization water supply equipment; c. Fire booster and pressure stabilization water supply equipment shared by both fire hydrant and automatic sprinkler systems.
　　2) Equipment is classified according to installation location:
　　a. Top-mounted fire-fighting pressure-stabilizing water supply equipment; b. Bottom-mounted fire sprinkler valve pressure-stabilizing water supply equipment
　　3) Equipment, classified according to the air pressure tank, includes:
　　a. Vertical-tank fire-fighting pressurization and stabilization water supply equipment; b. Horizontal-tank fire-fighting pressurization and stabilization water supply equipment; c. Air-inflated fire-fighting pressurization and stabilization water supply equipment; d. Capsule-type fire-fighting pressurization and stabilization water supply equipment

Working Principle and Features of Fire-Fighting Pressure-Boosting and Stabilizing Water Supply Equipment

　　The fire-fighting pressure-stabilizing water supply equipment, based on user requirements, first sets the desired water supply pressure. Once powered on, a pressure sensor monitors the pipeline pressure and converts it into an electrical signal, which is then sent to a programmable controller or microcomputer controller. After analysis and processing, the signal is transmitted to a frequency converter to control the operation of the water pump. When water consumption increases, the output voltage and frequency of the pump rise, causing the pump speed to increase and the water flow rate to rise accordingly. Conversely, when water consumption decreases, the pump speed slows down, reducing the water flow rate and maintaining the pipeline pressure at the set value. In systems with multiple pumps operating simultaneously, each pump starts up smoothly in sequence; the frequency converter gradually switches from variable-frequency operation to line-frequency operation until the required pressure and flow are achieved, thus realizing cyclical control of the pumps. During periods of low nighttime flow, the variable-frequency pump can continue to maintain system operation. Moreover, the variable-frequency water pump can be shut down while still maintaining system pressure.

　　1) Starting Modes: This equipment offers three control modes: automatic, manual, and remote fire linkage. The equipment can be started locally via an emergency fire button or remotely from the fire control center. The frequency converter cabinet is equipped with interfaces for fire start/stop signals. Upon receiving a fire signal, the equipment immediately switches to constant-pressure fire-fighting water supply mode. If one pump fails or the flow rate becomes insufficient, the system automatically switches to another pump via frequency conversion. Once the fire signal is cleared, the system immediately returns to its normal, stable fire-fighting pressure maintenance mode. To prevent potential failures in the automatic frequency conversion system, the system also features a manual 50-Hz power-frequency start function.

　　2) Pressure stabilization function: In automatic mode, when no fire-fighting signal is present, the frequency converter cabinet operates in a variable-frequency pressure-stabilization mode. The pressure gauge collects signals indicating the water pressure limits in the pipeline network. When the pipeline network water pressure drops to the lower limit of pressure stabilization, the fire pump runs at variable frequency to replenish water into the fire-fighting pipeline network. Once the pipeline network water pressure reaches the upper limit of pressure stabilization, the fire pump stops running, and at this point, the air-pressure tank takes over to replenish water into the pipeline network and maintain stable pressure.
　　3) Automatic Pump Switchover Function: The fire-fighting main pump is equipped with a cyclic rotation operation function. The switchover cycle is set by the frequency converter cabinet’s program and is typically configured to 24 hours. If the system detects a failure in one of the pumps, it will immediately switch over to another pump for stable pressure operation and trigger an alarm display.
　　4) Automatic (Manual) Inspection Function: Although fire pumps typically operate automatically, switching between pumps to maintain stable pressure, regular inspections of the pumps are still essential to prevent them from becoming “seized up” due to prolonged inactivity caused by unforeseen factors. The inspection cycle and inspection duration are both set by the program. During inspections, if a pump malfunctions, the system can automatically trigger an alarm.
　　5) Intelligent fire-fighting function: In the event of a fire or severe water leakage in the pipeline network, and in the absence of a fire signal, the equipment will automatically switch to a high-pressure, constant-pressure fire-fighting water supply mode and trigger an alarm.
　　6) Multiple protection and fault alarm functions: The system features protection and alarm functions for phase failure, overload, ground fault, undervoltage, and other conditions.
　　7) Control Interface: The system is equipped with a water-level interface for indicating low-water alarms. Additionally, it features a linked and feedback interface connected to the fire control center, enabling remote automatic start-up and real-time feedback on pump operating status. A standard RS485 communication interface can be provided upon request to facilitate remote monitoring.
　　8) It can be equipped with a dual-power switching device that automatically switches to the backup power source in case of a main power failure.

Application Scope of Fire-Fighting Pressure-Boosting and Stabilizing Water Supply Equipment

　　1. Residential water supply for newly built residential communities, villas, office buildings, and mixed-use buildings.

　　2. Domestic water supply for high-rise buildings, fire-fighting water systems, hotels, and restaurants.

　　3. Renovation of traditional water supply systems, such as pressurized water supply and pressurized ground-level reservoirs.

　　4. Various boiler cold-water supply systems and boiler hot-water systems.

　　5. Intermediate booster pump stations at water treatment plants and secondary pressurization of tap water.

　　6. Stabilization of water pressure in production and domestic water supply networks of various industrial and mining enterprises.

　　7. Various types of circulating water and cooling water supply systems.

　　8. Water supply systems where tap water pressure is insufficient to meet the demands of residential use and fire-fighting pressurized water supply, etc.

Friendly reminder: 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.

BH Series Variable-Frequency Constant-Pressure Water Supply Equipment

Box-type variable-frequency water supply equipment without negative pressure

BH Series Variable-Frequency Constant-Pressure Water Supply Equipment

Box-type variable-frequency water supply equipment without negative pressure

+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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