Shanghai Dongfang Pump Industry (Group) Co., Ltd. is a large enterprise in Shanghai that focuses on the research, development, production, and sales of safety water supply equipment. It has gone through the production of simple water supply equipment from "water storage tank+booster pump group+high-level water tank", the development of pressure water supply equipment from "water storage tank+booster pump group+pressure tank", the research and development of "water storage tank+constant pressure variable frequency water supply equipment", and the current widely promoted "stacked pressure water supply equipment directly connected to municipal pipeline network" and "EAST" brand. It continues to combine its long-term research and production experience in the water supply field, and is committed to directly and effectively solving various water supply solutions that meet customers' needs for new era water supply equipment through a large number of experiments and development applications. Requirement. The BW series tank type (non negative pressure) stacked water supply equipment has won recognition and praise from a large number of users; Dongfang Pump Industry has never stopped researching new water supply technologies and is launching the BW (5) series combination tankThe non negative pressure stacked water supply equipment has a more complete product structure, more reliable product performance, wider product coverage, and is more energy-efficient, environmentally friendly, and economical in market applications.

Product Features

• Pollution free: The equipment is directly connected to the municipal pipeline network to form a continuous and closed operating system, and foreign objects will not enter the system. The water quality supplied to users maintains the hygiene standards of municipal water sources and is a green and environmentally friendly product.

• No negative pressure: When the equipment is working normally, the multifunctional hidden flow tank ensures that it will not affect the municipal pipeline network and surrounding users regardless of whether there is a peak water consumption period through dynamic compensation of energy storage and automatic control of the system.

• Investment saving: No need to build water tanks, water treatment fees, or large pressure tanks, saving a lot of investment; Moreover, due to the utilization of pipeline pressure, the selection of booster pump units has been reduced, resulting in a decrease in equipment investment.

• High energy efficiency: directly connected to the pipeline network, it can fully utilize the pressure potential energy of the pipeline network itself, effectively leverage the advantages of variable frequency speed regulation, and make up for the difference as much as possible; During the low peak period of water usage, the equipment does not even need to operate, and the energy-saving effect is significant, saving 30% -90% of energy.

• Small footprint: No need to build water tanks or large pressure tanks, saving equipment system footprint.

• Easy to maintain: The equipment adopts microcomputer automatic control frequency conversion speed regulation operation, targeted automatic stop and start, and perfect fault detection, diagnostic technology and alarm reminders make management and maintenance extremely simple.

• Good performance: The equipment adopts a multi-stage stainless steel booster pump, and the pump casing, impeller and other flow components are stamped and welded with food grade stainless steel materials. The flow channel is smooth, efficient and energy-saving, and the operation is stable with low noise; The selection of high-quality components in the equipment ensures highly reliable overall performance, making it an ideal green, environmentally friendly, and energy-saving water supply equipment.

• High intelligence: The system integrates current automatic control technology and has reliable quality assurance.

Application scope

• Suitable for pressurized water supply in areas with insufficient tap water pressure but abundant water sources in the municipal pipeline network.

• Intermediate booster pump station for water supply in the water plant.

• Domestic water supply for high and low rise civil and industrial buildings.

• Production and domestic water use of industrial and mining enterprises.

• Fire water for high and low rise civil and industrial buildings.

• Various circulating water systems, etc.

• Revamp the existing secondary pressurized water supply equipment.

Equipment working environment

• Power supply voltage: 380V ± 10%;

• Vibration:<5.9m/s (0.6g), inclination: ≤ 5 ° in places

• Surrounding ambient temperature: 0 ℃~+40 ℃ (not frozen);

• Places with anti vibration equipment and no water vapor;

• Relative humidity of the air: 20%~90% (no condensation);

• Single motor power: ≤ 355kW;

• Pressure regulation accuracy: ＜ 0.01MPa;

• Flow range: ≤ 2000m ³/h

• Places without conductive dust that can corrode metals and damage insulation gases in Egypt;

• Head range: ≤ 360m;

• Places without explosion hazards;

Equipment configuration, working principle and function

Tank type (non negative pressure) stacked water supply equipment:

• Tap water enters the system through the inlet pipe, passes through a filter, backflow prevention device, flow meter, and pipe network protector, and enters the stabilizing tank. The outlet end of the stabilizing tank is connected to the inlet main pipe of the water pump group. The main pipe branches off and enters the water pump and bypass pipeline through valves. The outlet of the water pump is connected to the outlet main pipe through a noise reducing check valve and a disc valve.

• The steady flow compensation tank is equipped with an intelligent non negative pressure water supply controller, a vacuum suppressor, and a drain outlet at the bottom.

• Real time detection of municipal pipeline pressure through intelligent non negative pressure water supply controllers and other control devices.

• The equipment is equipped with a bypass pipeline connected to the water supply main.

• If requested by the user, the system can also be equipped with a disinfection interface to facilitate the inspection work of the health supervision department and the internal disinfection of the system.

Equipment structure and configuration description

Working principle explanation

• During the low peak period of water use, when the municipal pipeline network has sufficient water supply and the water supply pressure fully meets the pressure requirements of the user's pipeline network, the microcomputer control system controls the water pump to enter a sleep energy-saving state or a short-term low-speed operation of a single pump to supplement pressure. The user's water is directly supplied from the equipment bypass.

• During peak water usage periods, when the pressure in the municipal pipeline network is insufficient but the water supply can meet the needs of users, the pressure in the pipeline network is directly added to the inlet of the water pump. The microcomputer control system adjusts the speed of the water pump and the number of water pumps involved in the operation based on the user's water consumption to supplement the insufficient water supply pressure in the pipeline network. The system maintains constant pressure water supply to users.

• When the water demand of the user increases and the water supply of the pipeline network is less than the user's required water supply, the microcomputer control system will detect the real-time inlet pressure value of the pipeline network and use computer calculus fuzzy control to timely reduce the speed of the water pump, control the water supply to the user, ensure that the water supply equipment does not generate negative pressure suction in the municipal pipeline network, and will not stop water supply due to insufficient water supply.

• As the pressure in the pipeline gradually decreases to the pre-set protection pressure value, the microcomputer control system also gradually reduces the speed of the water pump until the system automatically stops running.

• When the system is powered off, it is completely supplied by the municipal pipeline network for natural water supply; Automatically wake up the device when a call is received.

• When the water supply network is completely shut down, the system will automatically shut down; When water comes in, restore normal operation.

Main functions of the equipment