Orifice plate diversion glass rotor flowmeter

Orifice plate diversion glass rotor flowmeter is a direct reading flow meter that combines the orifice plate of the main pipeline with the rotor flowmeter of the diversion pipeline to measure the diversion flow rate of the diversion pipeline and obtain the main pipeline flow rate. When the fluid flows through the main orifice plate, a differential pressure is generated on both sides of the orifice plate, which is proportional to the flow rate. A float flowmeter is installed between the inlet and outlet of the diversion pipeline, so that the flow rate of the float flowmeter is equivalent to the flow rate of the main pipeline. Therefore, the flow rate of the main pipeline can be read out through a glass rotor flowmeter. Because it can measure larger flow rates using a smaller diameter rotor flowmeter,

Changzhou Shuangcheng Thermal Instrument Factory

Orifice plate diversion typerotameter

User Manual

1 Overview

Orifice plate diversion glass rotor flowmeter Orifice plate diversionType flowmeterIt is a direct reading flow meter that combines the orifice plate of the main pipeline with the rotor flowmeter of the diversion pipeline to measure the diversion flow rate of the diversion pipeline and obtain the flow rate of the main pipeline.When the fluid flows through the main orifice plate, it is located on both sides of the orifice plateGenerate differential pressure, which is proportional to the flow rate, and install a float flowmeter in the diversion systempipelineBetween import and export, use a float flowmeterThe flow rate is equivalent to the flow rate through the main pipeline, so the flow rate of the main pipeline can be read out through a glass rotor flowmeter.Due to its ability to measure larger flow rates using smaller caliber rotor flow meters, it has a simple instrument structure, small size, and light weight, making it an ideal high flow measurement instrument. Widely used in chemical, light industry, pharmaceutical, food, papermaking, environmental protection and metrology testing, scientific research and other departments to measure the flow rate of single-phase non pulsating fluids (liquids or gases).

2 Orifice plate diversion glass rotor flowmeter outsideformsizeAnd the materials of the main components

SCKF-15-50

3 InstallAnd requirements：

Orifice plate diversion glass rotor flowmeterSCSCKF-Series orifice flowmeter

You can change the safety as shown in the figure on the right

Installation direction.Upstream pipeline must

Must be protectedproof10DAbove, below

The flow pipeline must be protectedproof5Dwith

up . note：“D”To facilitate the passage of pipelines

4 Specifications, models, and technical parameters

5 Orifice plate diversion glass rotor flowmeter刻Orifice plate diversion glass rotor flowmeter度修正

In the design and manufacturing of flow meters, water and air are used for calibration. However, in actual use, the density of the measured medium is different from that of the calibration medium. In this case, the original scale reading cannot be used, and the original scale must be corrected.

Correction when measuring liquids

Request the flow rate through the instrument in use:

QS=QN …………………………………………（1）

in the formula： QS -Actual traffic value.

QN –The reading of the instrument.

ρf -Float density.

ρN -20℃The density of water at that time.

ρS –The density of the measured medium.

Correction during gas measurement

When the measured gas is dry gas, calculate the flow rate through the instrument in use:

QS=QN ………………………………………（2）

Where:PNTheTNTheρN -The pressure, absolute temperature, and density of the calibration medium (i.e. air) under standard conditions.

PSTheTSTheρSN–The pressure, temperature, and density of the measured gas under standard conditions during measurement.

ZSN –The compression coefficient of the tested gas under standard conditions.

ZS –The tested gas isPSTheTStimeThe compression coefficient.

When the measured gas is a wet gas, calculate the flow rate through the instrument during use:

QSW=QN …………………（3）

Where:QSW –The actual flow rate value of wet gas.

φS -The relative humidity of the tested gas.

PDSTheρSN –The tested gas isTSThe saturation pressure and vapor density of water vapor at that time.

ZSNTheZφS –The tested gas isPNTheTNandPSTheTSThe compression coefficient of time.

6 Accuracy indication of flowmeter

The accuracy calculation of the flowmeter is as follows:

δ=×100％

Where:QN –Instrument scale indication

Q –Actual flow rate of liquid flowing through the instrument

Qmax -Measurement upper limit value of the instrument