One.product overview
Since the Lilin environmental protection since the successful development of non negative pressure pipe network steady flow of pressurized water supply equipment, has been to enhance the grade of products to improve water quality for the user as their responsibility, through pursuit of years of dedication, tireless efforts, no negative pressure water supply products has been developed to the tenth generation, product sales network coverage throughout the country, and the social from all walks of life are widely recognized and praised, Lilin environmental protection has become the no negative pressure of the industry leading enterprises. Based, combined with current market on drinking water quality requirements will continue to improve the status quo, applications for more than ten years experience in the design of vacuum products, bold innovation of the current products, through the unremitting efforts of R & D personnel and in the continuation of the previous generation equipment advantages based on, of products of key technology improved, 2011 officially launched LWFY intelligent sanitary type non negative pressure water supply equipment, the equipment using the latest development of the integrated control system, the system in a previous control system based on the highly optimized, the higher degree of intelligent, implementation and control speed faster, remote monitoring, monitoring more reliable. And LWFY no negative pressure device in the structure of bold innovation, configuration without negative pressure steady flow compensator to eliminate communicated with the outside air, to further improve the quality of the water used by the user, to make the water more health, equipment performance is more reliable. The connecting parts are food grade stainless steel material, and the equipment is novel, safe and reliable, delicate and beautiful, convenient to disassemble, easy to clean, maintain, and the system is expanded and changed. Compared with the traditional free vacuum equipment, LWFY intelligent sanitary no negative pressure water supply equipment intelligent degree is higher, better operation reliability, on drinking water quality is much more secure, and the structure is more compact, the utilization rate of the space more high, further saves the user pump room space, the series products of birth, without a major breakthrough in the vacuum products.
Two. Equipment composition
No negative pressure water supply equipment LWFY full intelligent sanitary type mainly by the steady flow compensator, a vacuum suppressor, intelligent computer frequency conversion control cabinet, water pump unit and other parts of the structure, and can according to user requirements with other components.


Three. Working principle: 
The equipment using frequency conversion technology based on microcomputer, negative pressure processing technology to achieve non negative pressure water supply, through vacuum compensation system and the closed structure realized with a tap water pipe network directly connected in series, and overcome the adverse effects of the pipeline. As shown here:


The frequency of the pump motor is controlled by the pressure of the computer. Firstly, according to the actual situation setting water pressure, to detect the actual pressure outlet and with a preset pressure were compared, if the actual pressure is higher than the set pressure, reduce frequency, whereas increasing the drive frequency. The industrial PC is based on the computer to detect the pressure of the pipe network, and adjust the operating parameters in time according to the feedback signal, so that the pressure of the pipe network is kept on the set pressure.
Also fully sealed structure and negative pressure feedback suppression system so that the device and tap water can be directly connected in series, by the superposition principle of the work of the water pump, the equipment can make full use of the original pressure of tap water, an increase of VVVF water supply equipment of energy saving. When inadequate water pressure causes the pressure to drop and the equipment through the vacuum suppressor and the steady flow compensator detection device for acquisition of the steady flow compensator in the vacuum degree and the water level signal, real-time feedback. Through microcomputer control vacuum suppressor and the steady flow compensator in special device actuation, inhibit the generation of negative pressure, ensure that the equipment not urban pipe network to generate any influence.

Four. Equipment advantages

(1) no negative pressure water supply:
Direct series municipal tap water or pressure pipe network, can be reliable to achieve no negative pressure water supply function.
(2) health and no pollution:
Fully enclosed design structure, to avoid the internal water contact with the outside air, effectively eliminate the two pollution, equipment parts all use food grade stainless steel material combination. Can be directly used for direct drinking water, pure water pressure water supply.
(3) save water resources:
This device does not need to build the intermediate link, such as the water tank and the water tank, that is to reduce the evaporation leakage and loss, and also to avoid the loss of the water flow caused by the periodic cleaning of the pool, to achieve the purpose of saving water.
(4) save investment:
There is no need to build a pool and water tank and save space, greatly reducing the investment in civil and equipment, but also save the maintenance costs of the tank and the water tank equipment, labor costs and material costs. Have good economy.
(5) smart self repair:
Equipment with independent research and development of water supply equipment controller, in the realization of water boot, shutdown anhydrous, small flow pressure maintaining and running of multiple etc. the traditional function based on, also has soft fault self diagnosis and self repairing, achieved full maintenance free, in order to improve the reliability of equipment operation.
(6) long service life:
Equipment and raw material, the use of food grade stainless steel SUS304 material, special users to use food grade stainless steel SUS316 material and unique welding technology and surface treatment technology are adopted, the service life of up to 50 years.
(7) energy saving effect is good:
In the original negative pressure energy-saving equipment based on, with small flow pressure maintaining water supply function, night equipment with less water, pumps do not work, can normal small flow of water, thus more energy-saving.
(8) the appearance of high grade:
The overall design of the equipment is reasonable, the proportion is even, the structure is coordinated. The appearance of the use of light or light treatment, so that the surface is more exquisite.

Five. Application scope

Is suitable for the water supply capacity of the water pipe network can not meet the needs of life, production and fire water two times the pressure water supply occasions:
1) living water for new or expanded office buildings, residential buildings, residential areas and their supporting facilities.
2) low level water pressure can not meet the requirements of fire water.
3) to transform the original air pressure water supply equipment.
4) it is necessary to build a pool of water that can be used in the form of a non negative pressure device and a pool of water.
5) large intermediate pressure pump station of water works.
6) the production of industrial and mining enterprises, domestic water, etc..
7) all kinds of circulating water system.
Especially for the following occasions
1 high demand for water, such as drinking water, pure water;
2 pump room environment, the device is easy to be corroded place;
CI's 3 water content in the high places, such as sea water, underground hot water supply;
4 in the water containing more corrosive components, such as water, sewage pressure.

six.Selection description