The BIF Model 20612 is a rate of flow controller that combines the Model 20181 high accuracy venturi form of the BIF Universal Venturi Tube (UVT®) with off the shelf butterfly valves.

The Universal venturi Tube gives this rate of flow controller a high metering accuracy at ±0.5% of actual flow rate and gives a very stable flow signal to aid in control loop setup and tuning. This excellent performance from the UVT also aids in giving the rate controller a high repeatability ±3% over a 4:1 flow rate range. For accuracy and repeatability your rate control system needs a BIF Model 20612 Rate of Flow Controller.

The Model 20612 is designed to fit the same laying length as the model 20610 Rate of Flow Controller also incorporates a removable, replaceable butterfly valve allowing the customer to standardize on any valve model type and design plant wide.

The Model 20612 Rate of Flow Controller is also sized for optimum controllability. This means typically that the valve is one line size smaller than the nominal inlet of the rate controller. This valve optimization puts the control in the linear control range of the butterfly valve and thus aids in quieting the control loop causing less “hunting” for the proper control point.

Combining the high accuracy UVT with a well-designed and properly sized butterfly control valve in a short flange to flange length yields a long service life, high accuracy and high repeatability for your rate control needs.