Principle of Velbar flowmeter

Principle of Velbar flowmeter

The high-pressure tapping hole of the probe will not be blocked, forming a high-pressure zone at the front of the probe. The pressure is slightly higher than the static pressure of the pipeline, preventing particles from entering. Please note that the fluid velocity at the high-pressure tapping hole of the probe is zero, and no object will enter the tapping hole. When starting up, the fluid enters the bend under the static pressure of the pipeline, quickly forming a state of pressure equilibrium. After the pressure equilibrium state is formed, the fluid encounters high pressure at the inlet of the bend, detours and no longer enters the bend.

Under normal circumstances, dust, sand, and particles are concentrated at the rear of the probe under the action of vortex force, achieving essential blockage prevention through the low-pressure hole of the power bar. That's why autumn leaves always gather behind windward houses. Other probes have low-pressure pressure tapping holes located in the vacuum zone at the tail of the probe. Under the action of vortex forces, the low-pressure pressure tapping holes of the probe are quickly blocked by impurities brought by eddy currents.Velbar flowmeterThe design is such that the low-pressure tapping holes are located on the back two sides of the probe side, at the front of the fluid separation point and wake area. This design fundamentally prevents blockage and can generate a very stable low-voltage signal.

Principle of Velbar flowmeter

Advantages of probes

Can measure multiple media and has a wide range of applications

High precision and large range ratio

The probe pressure hole is inherently anti blocking

● Stable measurement signal with minimal fluctuations

● Low pressure loss of pipeline *

● * High strength bullet shaped single piece dual cavity structure

Low installation cost, basically maintenance free

● Can be installed and maintained online

Characteristics of the Velbar Velocity Tube Flow Sensor

● Stable signal

The low-pressure tapping holes of the Weiliba are located on both sides behind the probe, between the separation point of the fluid and the probe, away from the vortex wave area.

● High precision

Weiliba can ensure the stability of accuracy because:

⑴. It is not affected by wear, dirt, and oil stains.

⑵. There are no movable parts in the structure.

⑶. The design eliminates the occurrence of blockage. At the front of the probe, a high static pressure zone surrounds the probe to prevent the high-pressure tapping hole from being blocked. It is important that the low-pressure holes are located on both sides of the probe side, and the fluid flows diagonally across the surface, protecting the low-pressure holes from being swept away. Other probes are prone to blockage because their low-pressure tapping holes are located in the low-pressure fluctuation area where impurities accumulate.