Increase of the water make the head reduce which is provided by water pump
The pump operates in a high efficiency zone, minimizing the shaft power, which can be difficult for different models. Panda pump in the analysis of centrifugal pump characteristics, based on the relationship between pump efficiency and flow indirectly obtained speed ratio M, for solving such problems provide a method. The use of frequency control system, real-time regulation of the pump speed, and meet the different needs of water supply, is a new scientific method of energy saving, in theory, can basically avoid the unnecessary loss of valve regulation.
First of all, the performance curve of the pump is on the flow and head of the quadratic curve, with the increase in water, water pump to provide the head is constantly reduced. Pump performance curve Centrifugal pump in the rated speed characteristic equation is: where the virtual total head for the zero flow is a constant associated with the pump, when access to frequency conversion equipment, with the pump speed continues to decline, parallel to the pump curve shift. The characteristic becomes: which is the speed ratio of water pump in addition there is a very important parameter curve, the curve increases monotonically by the monotonous increase in the peak monotonically reduce the peak should correspond to the design curve on the characteristic point, and the corresponding point The flow rate for the rated flow, the pump operating point in the operating point, the minimum loss. The farther away from the design conditions, the lower the efficiency.
Moreover, the industrial pump to pump the efficiency of the restrictions, the operating point can not deviate from the operating point too far the general efficiency of the pump must be above the peak. This will not be a low efficiency of the pump range, taking into account the pump frequency control ratio is limited, can not let the pump speed is too low.
Based on the above conditions, and then use the similar conditions of parabolic, you can get on the curve of a variable frequency pump operating point of the feasible area, when the pump operating point out of this area efficiency will be due to low and not meet the requirements. Forever pump factory that there is a need for a similar situation to do a little parabolic interpretation of similar parabolic equation in this equation on the various working conditions in the head of the square of water into a fixed proportion and has a very important nature – run time The efficiency is almost the same.
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Continuously improve product performance and quality, optimize the management service system, a complete after-sales service
Nanjing Forever Sewage Treatment Equipments Co,.Ltd guarantees the goods with the best quality, the use of first-class technology and made with the best materials, and in full compliance with national, industry, corporate standards or contract specifications, to ensure that the equipment is properly installed, the normal operation and maintenance, With satisfactory performance over its useful life. After the completion of equipment manufacturing, equipment quality, performance requirements in accordance with the relevant standards and the provisions of the contract for detailed and comprehensive inspection, so that the quality requirements to the demand side, and issued a product quality certificate.
Site inspection and acceptance
Upon completion of the installation of the equipment, the Company will appoint engineers to instruct the equipment to run the test and inspection according to the requirements of the purchaser. If the test results show that the equipment performance is deviated from the original technical requirements due to equipment quality problems, the Company is responsible for settlement. If necessary, repeat the test until the requirements are met.
Installation guidance services
The installation of the equipment shall be in accordance with the detailed construction drawings prepared by the Company. The company in the installation process to provide supervision and guidance, responsible for confirming the completion of equipment installation, only to be confirmed before entering the next stage of debugging equipment.
Run the debugging instructions
After the installation of the equipment, the Company will supervise the trial operation of the demand side, and jointly formulate the pilot plan with the demand side and guide the pilot project.
Site technical services
In order to successfully put the equipment into operation, the Company appointed skilled, qualified technical personnel to the site for technical services.
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How to maintain self-priming sewage pump
1.Check the tubing and junction of self-priming pump with or without loosening. Hand or tool to turn the pump, and check if sewage pump is flexible.
2.Try to control the inner self-priming pump flow and head on the plate indicated range to ensure self-priming pump operating at maximum efficiency point in order to obtain maximum energy savings.
3.When self-priming pump during operation, the bearing temperature can not exceed the ambient temperature of 35℃, the maximum temperature can not exceeding 80℃.
4.If self-priming pump has abnormal sound, it should be stopped immediately to check the reason.
5.To stop using sewage pump, turn off the valve, pressure gauge, and then stop the motor.
6.If self-priming sewage pump will not work in a long time or work in the winter season, after parking, the need of the lower pump drain plug unscrew the media put the net. Prevent cracking. (If sewage, please clean chamber with water)
7.Carefully listen to the motor running to check if sound is usual, because the runtime engine room noisy, by means of a screwdriver or listen rods and other aids, posted pro motor ends listen, if you often listen to, not only find motor and trailer bad vibrations moving equipment, even the inside of the bearing can determine how much oil is so timely add oil bearing, or replaced with new bearings and other appropriate measures to deal with, to avoid motor bearing short of oil and dry grinding stall, walk cylindrical, sweep chamber burned.
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Why self-priming sewage pump’s motor is hot?
In the process of self-priming sewage pump,if motor is too hot will cause tripping and stopping. The main reasons are as following:
1. Ultra-current, actual head reach, fluid overload, causing the motor load. Solution: install valve in the pump outlet, the valve off a small reduction in traffic.
2. Soaking of motor lead wet; solution: drying damp motor.
3. The supporting motor power is small; Solution: Adjust support, replace the motor.
So it is important to maintain self-priming sewage pump.
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OTHER ENTERPRISES
Volkswagen of Shanghai
Shanghai Dupont
The food Co.,Ltd.of McDonald of Beijing
Tianjin Smath Kline & French Laboratones Ltd
The chemical fibre of Yizheng
Farm of Daxing of Heilongjiang
Shanghai She Shan international golf club Co., Ltd.
Reach high papermaking Co., Ltd. majestically in Guangzhou
Flat south fish’s peak cement limited company of Guangxi
Fujian Nan Ping paper industry Co., Ltd.
Lekai film group company
International cooperation Limited Company of Dalian ,etc.
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Some details need to be pay attention when place the order
If you prepare to place order in our Nanjing Forever Sewage Treatment Equipments Co., LTD, please pay attention to the following details:
1.Payment
We can accept L/C, T/T, etc
2.Delivery
Normal product: 30 days for manufacture
Special request product: 2 months for manufacture
3.Package
Fumigate-free Wooden case by sea
4.Quality guarantee
Guarantee period: 12 months after delivery of goods, if have quality question, we will provide the damaged parts free of charge.
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