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What are the commonly used steam flow meters?
The commonly used steam flow meters mainly include the following
1. Introduction to differential pressure flow meters: In the measurement of steam flow, differential pressure flow meters still occupy the first place.
. It is widely used due to its authoritative standards as a basis, as well as the advantages of easy replication of detection parts, simple and sturdy structure, reliable performance, long service life, wide temperature and pressure range, low price, and no need for real flow calibration. Advantages: Especially suitable for measuring high temperature and high pressure saturated steam and superheated steam. Flexible and convenient to use, the entire set of instruments is composed of standard throttling devices, differential pressure transmitters, and flow integrators from different manufacturers. Disadvantages: The installation is cumbersome, prone to leakage, and the labor intensity of maintenance and disassembly is high; The range ratio is only 3:1, resulting in significant pressure loss; Due to changes in measurement conditions during use, process parameters may deviate from the design values, resulting in significant measurement errors.2. Introduction to Vortex Flow Meter: Vortex flow meters have the advantages of simple structure, no need for pressure tubes, large measurement range, and a range ratio of up to 10:
1. Low pressure loss, and their proportion in saturated steam flow measurement is increasing.
. Advantages: The installation difficulty of Chunnai is similar to that of orifice plates, and there are certain requirements for straight pipe sections. Disadvantages: Regular calibration cannot be done by most users and
3. Introduction to rotary rotor steam flowmeter: Rotary rotor steam flowmeter has a wide range of applications in measuring saturated steam in small and medium-sized enterprises. It is a pure mechanical principle measuring instrument. Advantages: simple structure, sturdy, and low maintenance; Adjusting the range only requires replacing the inner orifice plate and has a manual pressure compensation function, without the need for a power supply. Disadvantages: There are certain requirements for the straight pipe section, and the adaptability range of the pipe diameter is limited, so it can only be installed in a horizontal position; The accuracy is not high, and manual meter reading can only be done on-site, which is not convenient for measurement management.
4. Introduction to V-cone flowmeter: The measurement principle of V-cone flowmeter is the same as that of differential pressure flowmeter, and it is also a throttling differential pressure flowmeter. It adopts a gradual contraction throttling method of the edge wall, that is, "the contraction of the variable fluid at the center of the pipeline is called edge wall contraction". Advantages: The requirements for installing straight pipe sections are e
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