Differential Pressure Flow Meter  

Compressed air is an important energy for industrial production,  and flow rate of compressed air is an key parameter to indicate the performance of compressors. With the air compressor widely use the accurate measurement of its flow rate is crucial for product upgrades, control and monitoring and the energy saving. Comate PTF600 is the ideal model designed for wet/dry compressed air flow measurement, insertion type max can for DN400 pipe and do not nee to stop the line.

Measuring principle

When pipe full of fluids and when the flow across a constriction in the pipe that will creates a pressure drop . When the flow increases, more pressure drop is created. Highly sensitive pressure sensors measure the pressure before and after the constriction. According to Bernoulli’s principle, the pressure drop across the constriction is proportional to the square of the flow rate. The higher the pressure drop, the higher the flow rate.

q m –mass flow, kg/s
q v –the volumetric flow rate, m 3 /s
C– flow factor
ε– expansion coefficient
β–Diameter ratio，β=d/D
d–diameter of cross-sectional under working conditional, unit: m
D–upstream pipe diameter, m
△P–the pressure drop, Pa
ρl–fluid density, kg/m 3

ADVANTAGES AT A GLANCE

• Built-in temperature & pressure transmitter measurement standard flow/mass flow directly
• 32:1 wide turndown meet most of the flow range of compressed air
• Water injection design can wet/dry compressed air
• Insertion type, installation and maintenance can be finished on line

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