球探网足球比分

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Frequently Asked Questions and Answers

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List of Questions

problem

Throttling device installation requirements?

2018-09-18 08:39
answer
In order to ensure the measurement accuracy, it is necessary to specify the following main installation requirements: 4.1 For throttles or primary elements 4.1.1 The throttle must be installed in such a way that the fluid flows from the upstream side of the throttle to the downstream side (see the simplified head on the pipeline) ). 4.1.2 The throttle must be installed coaxially with the pipeline, and its misalignment should be within ± 1 °. 4.1.3 Throttling pieces and pipes must be concentric (or centered in the annulus), and the eccentric distance ex (distance between the centerline of the throttling pieces and the centerline of the upstream and downstream pipes) should not be greater than or 4.2 to the pipe 4.2. 1 Throttling parts should be installed in two straight sections
problem

Throttling device principle, structure and scope of use?

2018-09-18 08:37
answer
2.1 Principle A throttling member such as an orifice plate or a nozzle is installed inside the pipe. When the fluid flows through the throttling member, a static pressure difference occurs between the upstream and downstream sides of the pipe. , So by measuring the differential pressure and the known nature of the flowing fluid and other relevant environmental conditions, the flow can be calculated according to universal international standards. 2.2 Pressure extraction method 2.2.1 Angle connection pressure extraction method: used for orifice plate and ISA1932 nozzle, there are separate drilling pressure extraction and ring chamber pressure extraction. For the orifice plate, the pressure taking holes on the upstream and downstream sides of the throttle are flush with the front and rear end faces of the throttle, see Figure 1; for the ISA1932 nozzle
problem

What is a throttling device

2018-08-16 11:10
answer
Differential pressure flowmeters composed of throttling devices and differential pressure gauges or differential pressure transmitters are most widely used in the measurement, control and adjustment of liquid, gas and water vapor flow rates under single-phase conditions. Because it has the advantages of simple structure, convenient maintenance, reliable use, low price and high accuracy.
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