SIKE meter differential pressure flowmeter (chart)
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Differential pressure flowmeter is divided into two categories: standard throttling device and non-standard throttling device. Standard throttling devices that are designed to be installed and used in accordance with iso 5167 international standards and (or) GB/T2624 national standards are also known as non-standard throttling devices. The dosage of the standard throttle device is greater than that of the latter, but the structure type of the standard throttle device, the variety caliber specification and the range of applicable media conditions are far more than the former.
(1). purpose and features
1. Application: differential pressure type flow meter and differential pressure transmitter, flow integrator, etc., constitute differential pressure flowmeter and differential pressure flowmeter installed on the pipe, which is a component of flow measurement. It is mainly used to measure the various gases that flow through the pipeline (pure or dust-containing), steam (saturated or overheat) and liquids (conductive or non-conductive). Highly corrosive; The flow of viscous or containing small particles of dirt and so on. Direct measurement of volume flow or mass flow.
2, the characteristics of
Differential pressure flowmeter is the most widely used and the most widely used flow measurement method. It has many main advantages.
1) the measurement accuracy can be determined by differential pressure flowmeter without actual flow calibration. (the only current meter).
2) the applicable measured medium is wide and can be used to measure the flow of all gases, steam and liquids.
3) diameter range, 2 ~ Φ Φ 3000 mm (or more); Section shape: round rectangular.
4) the pressure can be as high as 32MPa; It can also be used for negative pressure.
5) medium temperature range: - 185 ~ + 650 ℃, flowmeter has no other possibility.
The structure of differential pressure flowmeter is varied. Almost all kinds of fluid flow measurements can be applied.
7) the range of flow can be changed at the site by setting the differential pressure workaround range.
8) use, operate simple, easy to master, daily maintenance small.
(2). Principle of action
The principle of measuring flow of differential pressure flowmeter is based on the famous principle of working fluid mechanics. Put a throttle in the pipe as shown in figure 1. Has the fluid flows through the throttling parts will produce a pressure difference on both sides of the throttling parts (the differential Δ P), then the flow rate is proportional to the square root of the differential pressure:
Volume flow:
In the formula:
A: constant
C: outflow coefficient
β: diameter ratio (= D/D)
d: throttling diameter (mm)
ε: expandable coefficient
ΔP: throttle differential pressure (Pa) before and after
ρ: fluid density under working conditions (kg/m3)
Standard nozzle
Standard nozzle
Large aperture standard hole board DN1000
Large aperture standard hole board DN1000
Large aperture standard hole board DN1000
Large aperture standard hole board DN1000
Integrated orifice flowmeter
Integrated orifice flowmeter
Integrated orifice flowmeter
Integrated orifice flowmeter
Long neck nozzle
Long neck nozzle