Flow meter with oval gear

• Medium: High viscosity liquid: glue, asphalt, heavy oil, thermal oil, hydraulic oil, etc.
• Accuracy: 0.2%, 0.5%.
• Measuring cable: DN10-DN200.
• Flow range: 0.1-340 m3/h.
• Advantages: Direct reading meter without external power supply, no front straight pipe section required. Wide measurement range. High accuracy.

Operating principle of an oval gear flow meter

An oval gear flow meter consists of a meter and a pair of elliptical gears mounted in the meter, and the top and bottom caps form a sealed crescent-shaped cavity (due to the rotation of the gear it is not sealed) as a displacement calculation unit.

The flow meter is mainly composed of body, meter, elliptical gear and coupling (magnetic coupling and axial coupling), etc.

When the measured liquid enters the flow meter through the pipeline, the pressure difference generated at the inlet and outlet pushes the pair of gears to rotate continuously and the liquid measured by the crescent-shaped cavity is continuously transported to the outlet. The product of four times the secondary volume is the total value of the measured fluid flow.

The elliptical gear creates a torque that causes it to rotate under the influence of the pressure difference Δp of the measured medium.

Rotor 1 and rotor 2 are alternately driven by one to rotate the other. Each rotor has two magnets as signal generating elements. At the center of the two axes at the bottom of the cavity there is a magnetic signal detection element. Each time the magnet returns to the detection element, the sensor counts a pulse. Each pulse corresponds to a certain amount of discharge of the medium, so it is possible to obtain the volumetric flow rate of the medium removed by each pulse.

Characteristics of Oval Gear Flowmeter

• High measurement accuracy: 0.2 and 0.5.
• The mechanism is simple, strong and reliable.
• Particularly suitable for measuring highly viscous media.
• Easy to install. There is no need for straight pipe runs before and after the flow meter, and there is no need to install straight pipe sections.
• Cast iron oval gear flow meter is widely used in various petroleum products and non-corrosive liquid medium measurement for cast iron.
• Cast steel oval gear flow meter for measuring high pressure and low corrosive environments.
• Stainless steel oval gear flow meter is widely used in corrosive liquid media such as acid, alkali, salt.
• To prevent contamination from blocking the flow meter mechanism, a filter must be installed in front of the flow meter.
• Explosion protection class: ExiaIICT6.