The throttling flowmeter is a typical differential pressure flowmeter and is the most commonly used flowmeter for measuring gas, liquid and vapor flow in industrial production.
The throttling flowmeter is a typical differential pressure flowmeter and is the most commonly used flowmeter for measuring gas, liquid and vapor flow in industrial production. In the entire industrial production field, throttling flow meters also account for more than half of the total number of flow meters, so throttling flow meters are widely used in the industrial field. Including liquid, gas and steam can be measured, part of the mixed phase flow, such as gas-solid, gas-liquid, liquid-solid, etc. can also be applied, the general production process of the pipe diameter, working state (pressure and temperature) have products.
As the most important branch of the flowmeter, the throttling device is divided into two categories: standard throttling device and non-standard throttling device. Standard throttling devices are: standard orifice plate, ISA standard nozzle, long neck nozzle, classic venturi and venturi nozzle; non-standard throttling device: annular orifice plate, quarter circle nozzle, quarter circle Orifice plate, tapered inlet orifice plate, round hole orifice plate, eccentric orifice plate, double orifice plate, low pressure loss flow tube, rectangular venturi tube, V-cone flowmeter, wedge flowmeter, built-in orifice plate, restrictor orifice Board and so on. At present, the most popular types of throttling and dynamic pressure heads are used in various types, and there are dozens of throttling type detection parts. New varieties are emerging constantly, and more mature to standard type. The dynamic pressure head type has a rapid development in recent years, and it is the main type of plug-in flowmeter. The standard throttling device can be used without real-flow calibration and is unique in the flowmeter. The range is narrow, because the differential pressure signal and the flow rate are quadratic, generally 3:1 or 4:1. The pressure pipeline between the detection component and the differential pressure display instrument is a weak link, which is prone to leakage, jamming, freezing and signal distortion. The repeatability and accuracy of the measurement are moderate in the flowmeter, and the accuracy is difficult to improve due to many factors. In order to make up for the shortcomings of the differential pressure flowmeter, some measures are taken, such as widening the range, reducing the pressure loss, and improving the measurement accuracy. On-site installation conditions are required to be high. If long straight pipe lengths (such as orifices/nozzles) are required, it is generally difficult to meet.
The throttling flowmeter has the advantages of simple structure, convenient installation, reliable operation, low cost and certain accuracy. Can meet the needs of engineering measurement. There is also a long history of use, rich and reliable experimental data, and design processing has been standardized. As long as the throttling flowmeter is designed and manufactured according to the standard, the actual calibration is not required, and the flow can be performed within the known uncertainty range.
Huajiang Automation can provide you with the most professional throttling flowmeter selection recommendations and the most reliable instrument products. If you have any questions, we will have professional technicians to help you with your answers. I hope to help you!
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Flat Field Holographic Concave Grating
The Concave Grating has the advantage of being able to constitute a spectroscopic system without any assistance from concave mirrors or similar types of image-forming elements. For this reason,the Concave Grating is used in a wide range of applications, such as analytical instruments,optical communications,biotechnology,and medical instruments. Spectroscopes incorporating concave gratings are classified roughly into two groups: polychromators or monochromators.
China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300x300mm2 for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.
Please contact us for Customing Sizes and types of gratings.
Holographic gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
Flat Field Holographic Concave Grating,Flat Field Concave Grating,Spherical Holographic Grating,Aberration Corrected Holographic Grating
China Star Optics Technology Co.,Ltd. , https://www.csoptlens.com