product details

Brand: Xunyi

Model: VA

Type: Variable Area Flow Meter

Measurement range: 0.12-300 (m3/h)

Accuracy level: see flow chart for details

Nominal diameter: DN15~DN50 (mm)

Work pressure: ≤ 1.0MPa (MPa)

Applicable media: liquid, gas

Brief introduction

This series of flow meters is an imported type. We can provide millimeter scale, percentage scale, flow scale, and detachable external scale. The GA24 model can easily replace the cone tube and float without removing them from the pipeline. GA24, FA10, and FA20 are movable flange connections (flange standards use GB/T919-2000, and can also be manufactured according to customer requirements), VA10 and VA20 are threaded connections, and SA10 and SA20 are hose connections.

2、 Main technical parameters

IIIdimension

4、 Installation instructions

1. Before installing the flowmeter, carefully check whether the measuring edge (reading edge) of the float is damaged. For flowmeters with guide rods, remove the filling material that prevents the float from jumping during transportation and check whether the float can slide freely on the guide rod.

2. The flowmeter should be installed in a vertical position (the angle between the centerline of the flowmeter and the plumb line should not exceed 5 °) and have reliable support, and should not be subjected to any tension or pressure from the pipeline. When installing a new pipeline, the pipeline should be flushed clean before installing a flow meter. The measured fluid enters and exits from the lower end of the flowmeter. Be careful not to hold any flow meter in your hand for use!

3. The upstream (inlet end) of the flowmeter should have a straight pipe section with a nominal diameter of 5-10 times

4. There should be no large particles of dirt mixed in the measured fluid, otherwise the float may get stuck or block the flow meter passage. If necessary, a filter should be installed upstream of the flow meter.

5. The measured fluid pressure must be stable. Unstable fluid pressure can cause float fluctuations and inaccurate measurement. A buffer or setting device should be installed upstream of the flowmeter.

6. There is backflow in the pipeline, especially due to water hammer. To prevent damage to the flowmeter, a one-way check valve should be installed after the downstream valve of the flowmeter.

7. If the measured liquid contains water bubbles, an exhaust port should be installed on the flowmeter.

5、 Instructions for use

1. The upstream valve of the flowmeter should be slowly opened to prevent the float from suddenly rising and damaging the glass tube. Then, the downstream regulating valve should be used to adjust the flow rate. When stopping the work, the upstream valve should be closed first, and then the downstream regulating valve should be closed. Suggest wrapping a metal mesh around the flowmeter to enhance safety protection.

2. Avoid sudden temperature changes in the fluid being tested.

3. When the cone tube and float are contaminated, they should be cleaned in a timely manner.

4. Regularly check the error of the flowmeter. Once it exceeds the specified error, the float and cone tube should be replaced or recalibrated.

5. If leakage is found in the flowmeter during use, it is usually due to the failure of the sealing ring and should be replaced.

6、 Product Display