The rated pressure of the selected metering pump should be slightly higher than the actual maximum pressure required by 10-20%. Do not choose too high because the pressure is too high, it will waste energy and increase equipment investment and operating costs.
Selection of metering pumps
First, determine the pressure: the rated pressure of the selected metering pump is slightly higher than the actual maximum pressure required by 10 to 20%. Do not choose too high because the pressure is too high will waste energy and increase equipment investment and operating costs.
2. Determine the flow rate: The selected metering pump flow rate should be equal to or slightly larger than the required flow rate of the process. The metering pump flow rate is preferably in the range of 30 to 100% of the metering pump rated flow range. Considering the economical and practical recommendations, the actual required flow rate of the metering pump is 70~90% of the rated flow of the metering pump.
Third, determine the pump head (hydraulic end) material: the specific model specification of the metering pump is determined and then select the material of the overcurrent part according to the properties of the flow medium. If improperly selected, the medium will corrode and damage the overcurrent parts or the medium leakage pollution. When the system is serious, it may cause a major accident.
Metering pump flow control and adjustment method
Adjust the plunger or piston stroke, adjust the pump color, build the adjustable stroke and the pump speed. Among them, the method of adjusting the stroke is the most widely used, and the metering accuracy can be maintained at a small flow rate. The stroke adjustment mode has the following Three kinds:
1, manual adjustment when parking: manually lifted when parking, the sister metering pump stroke.
2, manual adjustment during operation: change the axial displacement during pump operation to change the radius of the crank to adjust the stroke length. Commonly used methods include N-shaped crankshaft adjustment, L-shaped crankshaft adjustment and eccentric cam adjustment.
3, automatic adjustment during operation: There are two kinds of pneumatic control and electric control. Pneumatic control is to achieve the purpose of automatically adjusting the stroke by changing the pressure signal of the air source; electric control is to achieve the purpose of automatically adjusting the stroke by changing the electric signal.
Control of the metering pump: precise machining accuracy ensures the precise metering of the delivered medium with each pumping volume. The volumetric flow rate of the pump's output fluid is proportional to the stroke length and the reciprocating frequency, ie the pump speed, at a certain effective plunger area. .http://NewsDetail293T2.htmlChina Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Tension & Compression Load Cells
Tension and compression load cells can be used to measure both tensile and compressive loads. Manufactured from stainless steel or aluminium alloy, these tension and compression load cells offer a high level of corrosive resistance for use in harsh environments with environmental sealing up to IP68. Available in capacities from 1kg to over 100 tonnes, all tension and compression load cells are supplied with a full certificate of calibration. Custom designed tension and compression load cells are also available, along with a wide variety of associated instrumentation.
Benefits:
- High accuracy
- Hassle free installation
- Long term, reliable operation
- Customisable
Compression Sensor,Tension Sensor,Compression And Tension Sensor,Compression/Tension Sensor
Zhejiang Nanhua Electronic Technology Co., Ltd , https://www.nhloadcells.com