Product Overview
　　With the acceleration of China's urbanization and the gradual improvement of people's living conditions, in order to meet the needs of a moderately prosperous society, a series of buildings such as residential communities, government offices, schools, hospitals, hotels, etc., are constantly being built, expanded, and renovated. Buildings are getting taller and taller, while the pressure of the municipal water supply network is severely insufficient, making the problem of difficulty in obtaining water for residents increasingly serious. Traditional methods involve building water tanks and pump rooms to add large water tanks, and then using pneumatic or variable frequency water supply and other secondary water supply methods. This results in high facility investment and a large amount of building area. When tap water is stored in a water tank for a period of time, secondary water pollution will occur. This is because the water in the tank is often contaminated by debris, mud, dirt, and even animal carcasses. In summer, the water quality is also easily deteriorated and changes in taste, causing great harm to human health. In order to eliminate secondary pollution, many units have invested heavily in disinfection equipment and assigned personnel to monitor and manage and maintain the equipment. On the other hand, the original pressurized tap water is put into the water tank, so that the pressure can become zero, and then starts to increase the pressure from zero to meet the water supply of the building, causing the original energy of the tap water to be wasted. To solve the above problems, our company has designed and developed constant pressure variable frequency water supply equipment, which makes the water supply environmentally friendly, energy-saving, and saves land and investment, while better solving the problem of high-rise water supply, in line with the national urban water supply regulations, avoiding the embarrassment of directly installing pumps to draw water from the urban water supply pipeline, and creating a new era in the water supply field.
　　Working Principle
　　When the tap water pressure meets the user's requirements, the tap water from the pipe network first enters the constant pressure device and then enters the system through the bypass pipeline. When the pressure is lower than the user's requirements, the equipment automatically starts the variable frequency pump to make the pressurization system run and maintain the system's constant pressure water supply. The higher the tap water pressure, the lower the speed of the variable frequency pump, the lower the power, and the lower the energy consumption, and vice versa; the constant pressure device is equipped with a constant pressure controller, which is used to stabilize the pressure of the constant pressure device to prevent negative pressure, thereby ensuring the normal water supply of the tap water pipeline. If the tap water is cut off, the equipment has a water shortage protection function and will automatically shut down. When the tap water is restored, the equipment will automatically resume water supply.

　　Application Range
　　●Suitable for pressurized water supply in any area with insufficient tap water pressure.
　　●Daily water supply for ordinary residential buildings, commercial and residential buildings, and residential communities.
　　●Hot water supply system for residential communities and high-rise buildings.
　　●Daily water supply for high-rise and multi-story buildings, high-end hotels, etc.
　　●Daily water supply for comprehensive buildings, office buildings, clubs, etc.
　　●Small intermediate pump station pressurization system.
　　●Production and domestic water use for factories and mines.

　　Product Features
　　●Environmental protection: Avoid secondary pollution of tap water.
　　●Energy saving: It can fully utilize the water pressure of the existing pipe network.
　　●Cost saving: Small footprint, no need to build water tanks.
　　●Legal: Complies with the requirements of urban pipe network regulations and avoids pumps directly drawing water from the urban pipe network.
　　●Convenient: No water tanks are needed. After the equipment enters the factory, only the inlet and outlet water and the control cabinet need to be connected to achieve fully automatic operation.
　　●Effort-saving: No need for dedicated personnel to watch.
　　●Universal: It has all the functions and characteristics of traditional variable frequency water supply equipment.

　　Technical Parameters and Indicators
 

　　
　　
　　
　　Model Description

　　Example: JZR-W-12-45-2-800C means constant pressure variable frequency water supply equipment, rated flow rate 12m3/h, rated head 45m, equipped with 2 CDL type working pumps, and a constant pressure device diameter of 800mm.

　　Equipment Selection Guide
　　In the JZR-W constant pressure variable frequency water supply equipment, the water pump's water supply capacity should meet the requirements of the maximum water consumption during peak water consumption and the water supply pressure at the most unfavorable point of the pipe network.
　　●According to the required flow rate and head.
　　●According to the required water pump style.
　　●If there is no satisfactory equipment model in the equipment selection parameter table, our company can design it for you.
　　●The required water pressure of the user can also be selected according to the following table:

　　Schematic diagram of JZR-W constant pressure variable frequency water supply equipment

Equipment Selection Guide
　　●The water supply pump shown is a two-pump parallel type, sometimes multi-pump parallel or single-pump. When there are two pumps, one is a backup. When there is a single pump, select the pump according to the water supply design flow rate Q (m3/h). The single-pump flow rate is Q (m3/h), and the head H (m) is determined according to the water pump flow rate and head curve; when there are multiple pumps, select the pump according to the design flow rate Q (m3/h), and the pump group flow rate Q (m3/h) and the corresponding operating point head H (m) are determined according to the flow rate and head curve of multiple pumps in parallel.
　　●The equipment includes a channel steel base, water pump, constant pressure device, accessories, etc.
　　●The following water pumps are for reference, and users can also choose other models of water pumps.
　　●The equipment inlet main pipe (tap water pipe) should not be smaller than the equipment total outlet pipe.

　　JZR-W Constant Pressure Variable Frequency Water Supply Equipment Selection Parameters