Product Details

1、 Characteristics of hydraulic oil small-diameter turbine flowmeter:
From the previous discussion, it can be seen that a flowmeter is a flow meter with many advantages. In summary, it has the following characteristics
1. High accuracy
The accuracy of the flowmeter is between 0.5-0 About 1%. Within the linear flow range, even if the flow rate changes, the accuracy of cumulative flow will not decrease. Moreover, the reproducibility of the flowmeter can reach 0.05% in a short period of time
2 Range Width Ratio
The range ratio of the flowmeter can reach 8-10. Under the same caliber, the maximum flow value of the flowmeter is greater than many other flowmeters
3. Strong adaptability
The flow meter can be made into a closed structure, and its speed signal is non-contact measurement, so it is easy to achieve high pressure resistance design.
If the turbine and bearings of the flowmeter are made of materials with high temperature resistance and low thermal expansion coefficient, they can be used over a wide temperature range. At this time, attention should be paid to correcting its instrument coefficient mainly due to changes in its flow cross-section:
K＝K 0 [1－ R ＋2 H t－to] 3－23
In the formula, K, K 0- instrument coefficients during use and calibration;
t. T 0- Fluid temperature during use and calibration;
R. H represents the material expansion coefficients of the turbine and the casing, respectively
4 digital signal outputs
The output of the flowmeter is a pulse digital signal proportional to the flow rate. It has the advantages of accuracy not decreasing during transmission, easy accumulation, and easy input into the computer system

Installation requirements for connecting pipelines:

1. Sensors installed horizontally require that the pipeline should not have any visible tilt (generally within 5 °), and sensors installed vertically should also have a verticality deviation of less than 5 °.

2. In places where continuous operation is required without stopping the flow, a bypass pipe and a reliable shut-off valve (as shown in the figure above) should be installed, and the bypass pipe should be ensured to be leak free during measurement.

3. Insert a short pipe to replace the sensor at the position where the sensor is installed in the newly laid pipeline. After the "line sweeping" work is completed and the pipeline is confirmed to be clean, the sensor can be officially connected. Due to neglecting this task, it is not uncommon for sensors to be damaged during line scanning.

If the fluid contains impurities, a filter should be installed on the upstream side of the sensor. For those that cannot be stopped, two sets of filters should be installed in parallel to alternately remove impurities, or an automatic cleaning type filter should be selected. If the measured liquid contains gas, a gas eliminator should be installed on the upstream side of the sensor. The discharge and exhaust ports of filters and air purifiers should be connected to a safe location.

If the sensor is installed at the low point of the pipeline, in order to prevent impurities from settling and accumulating in the fluid, a discharge valve should be installed in the pipeline behind it to regularly discharge the settled impurities.

If the measured fluid is a liquid that is easily vaporized, in order to prevent cavitation, affect measurement accuracy and service life, the outlet pressure of the sensor should be higher than the calculated minimum pressure. The flow regulating valve should be installed downstream of the sensor, and the upstream shut-off valve should be fully opened during measurement, and these valves should not produce vibration or leak outward. For processes that may generate reverse flow, check valves should be added to prevent fluid from flowing in the opposite direction.

7. The sensor should be concentric with the pipeline, and the sealing gasket should not protrude into the pipeline. Liquid sensors should not be installed at the highest point of horizontal pipelines to prevent gas accumulation in the pipeline (such as air mixed in during flow stoppage) from staying at the sensor and being difficult to discharge for image measurement.

8. The front and rear pipelines of the sensor should be firmly supported and free from vibration.

9. Insulation measures should be taken for sensors and their front and rear pipelines for easily condensable fluids.

Transportation and storage

Sensors should be packed in sturdy wooden boxes (small caliber instruments can be packed in cardboard boxes), and are not allowed to move freely inside the box. They should be handled with care during transportation and rough handling is not allowed. The storage location should meet the following conditions:

1. Rainproof and moisture-proof.

2. Not subject to mechanical vibration or impact.

3. Temperature range -20 ℃ to 55 ℃.

4. The relative humidity should not exceed 80%.

5. The environment does not contain corrosive gases.