Thermal insulation jacket type circular gear flowmeter

1、 Product Overview

UHGF seriesThermal insulation jacket type circular gear flowmeterIt is a volumetric flowmeter used for measuring small flow rates. A flowmeter is a volumetric measuring instrument used for continuous or intermittent measurement and control of liquid flow in pipelines. It has a wide range of measurement, high accuracy, low pressure loss, strong viscosity adaptability, and can measure the volume flow rate of high-temperature and high viscosity liquid media.

2、 Working principle

UHGF seriesThermal insulation jacket type circular gear flowmeterIt belongs to a volumetric flowmeter, and its main working principle is that two precision gears can freely rotate inside the measuring chamber. A sealed cavity is formed between the gear and the housing. The measured medium drives the gear to rotate. The flowing medium is evenly distributed in the measuring chamber and drives the gear to rotate. Gears rotate freely and are not hindered by the flow of media. The rotation frequency of the gear is proportional to the flow rate, and the actual flow rate is measured by non-invasive sensors on the housing wall.

3、 Functional Features

(1) Flow measurement is independent of the flow state of the fluid;

(2) The higher the viscosity of the medium, the smaller the amount of leakage from the gear and measuring space gap. Therefore, the higher the viscosity of the measured medium, the smaller the leakage error, and the more advantageous it is for measurement;

(3) High measurement accuracy, suitable for high viscosity medium flow and measurement, but not suitable for fluids containing solid particles, requiring the installation of filters; If there is gas mixed in the medium, it can also cause measurement errors;

(4) Small size, light weight, low vibration noise during operation, capable of measuring fluids with viscosity up to 10000pa. s. The measurement accuracy is 0.5Level 1.0;

(5) There are various types such as universal, high-pressure, and food grade, suitable for measuring small flow rates of various cleaning liquids;

4、 Selection technical indicators

Product Features

1. Not affected by the viscosity of the medium;

2. Lightweight and compact structure;

3. Both instantaneous flow and cumulative flow can be measured;

4. The orientation and direction of the device are not constrained.

It is particularly suitable for heavy oil Glue Kerosene Flow measurement of high viscosity media such as resins Small volume, light weight, low vibration noise during operation, and stable operation (capable of measuring fluids with viscosity up to 10000 Pa · s) It can also be used for measuring small flow rates of small pipe diameters The starting flow rate is small, the range ratio is wide, and it is suitable for measuring liquid flow rates that are subject to large fluctuations. The measurement accuracy is not affected by pressure and flow rate changes, and it has many characteristics such as stable performance, long service life, and high flow capacity.

3、 The selection technical parameters are as follows:

Measurement Range Table

Model

5、 Installation instructions for circular gear flowmeter

(1) When using a circular gear flowmeter, the measured liquid should be kept clean and free of fibrous or granular impurities.

(2) The opening and closing sequence of valves when the circular gear flowmeter is put into operation

(3) For flow without a bypass pipe installed, first open the upstream valve of the transmitter at a medium opening, then slowly open the downstream valve at a lower flow rate for 10 minutes, and then fully open the upstream valve to the required normal flow rate

(4) To install the transmitter of bypass pipe, first fully open the bypass pipe valve, open the upstream valve with a medium opening, then slowly open the downstream valve, turn down the opening of the bypass valve, make the transmitter run at a low flow rate for 10 minutes, then fully open the upstream valve and fully close the bypass valve (ensure no leakage), and finally adjust the opening of the downstream valve to the required normal flow.

(5) When opening and closing the valve, it should be gentle. If automatic control is used for opening and closing, especially for medium and large diameter sensors, it is best to use the "two-stage opening and two-stage closing" method to prevent the sudden impact of liquid from causing water hammer effect and damaging the gears.

(6) To ensure the long-term normal operation of the transmitter, it is necessary to strengthen operational inspections. Once any abnormalities are found, timely measures should be taken to eliminate them. Pay special attention to monitoring the rotation of the gears, and promptly check the transmitter if any abnormal sounds are heard.

(7) The maintenance cycle of the transmitter is generally three months. When inspecting and cleaning, be careful not to damage the internal components and assemble them according to the original configuration position

(8) When the transmitter is not in use, the internal liquid should be cleaned and protective covers should be added at both ends of the transmitter to prevent dust and dirt from entering, and then stored in a dry place.

(9) The filter used should be cleaned regularly, and a protective cover should be added when not in use to prevent dust and dirt from entering, and then stored in a dry place.

(10) The transmission cable of the sensor can be laid overhead or buried underground (plastic or iron pipes should be covered when buried)