INTRODUCTION

The LWGY series liquid turbine flowmeter is a primary type of velocity flowmeter. When the measured fluid passes through the turbine flowmeter sensor, the impeller is driven to rotate by the fluid force, and its rotational speed is directly proportional to the average flow velocity in the pipeline. Meanwhile, the blades periodically cut the magnetic lines of force generated by the electromagnet, changing the magnetic flux of the coil. In accordance with the principle of electromagnetic induction, a pulsating potential signal, namely an electrical pulse signal, is induced in the coil, and the frequency of this electrical pulsating signal is proportional to the flow rate of the measured fluid.

WORKING PRINCIPLE

The fluid flows through the sensor housing. Since the impeller blades form a certain angle with the flow direction, the fluid impulse exerts a rotating torque on the blades. Overcoming the friction torque and fluid resistance, the blades rotate and maintain a stable rotational speed when the torques are balanced. Under specific conditions, the rotational speed is proportional to the flow velocity. As the blades are magnetically conductive and situated in the magnetic field of the signal detector (consisting of magnet steel and a coil), the rotating blades cut the magnetic lines of force, periodically changing the magnetic flux of the coil and thus inducing an electrical pulse signal at both ends of the coil. This signal is amplified and shaped by an amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted remotely to a display instrument for showing the instantaneous and cumulative flow rates of the fluid. Within a specific flow range, the pulse frequency 

PRODUCT ADVANTAGES

• High accuracy, generally up to ±1%R, ±0.5%R, and the high-precision type up to ±0.2%R;

• Excellent repeatability. Ultra-high accuracy can be achieved with regular calibration or on-line calibration, making it a preferred flowmeter for trade settlement;

• Equipped with meter factor calibration function, which intelligently compensates for the non-linearity of the meter factor and supports on-site calibration;

• All valid data can be retained for 10 years without loss after power failure;

• Wide turndown ratio, up to 1:20 for medium and large calibers, and 1:10 for small calibers;

• Compact and lightweight structure, easy installation and maintenance, and large flow capacity;

• Suitable for sealed measurement, no need to drill holes on the meter body, and easy to manufacture into explosion-proof meters.

TECHNICAL PARAMETERS

APPLICATION FIELD

Liquid turbine flowmeters are widely used in measurement and control systems in fields such as petroleum, chemical industry, metallurgy, and scientific research. Liquid turbine flowmeters equipped with sanitary connectors can be applied in the pharmaceutical industry.