The Universal Venturi Tube (UVT) has a “TRUE” Venturi Shape as shown here


Hydraulic Shape

A “true” venturi meter has static pressure taps at both the inlet and throat sections. A static pressure tap senses the pressure in a cylindrical area where the flow is not changing direction and is parallel to the pipe wall. This unique shape conditions the flow in the transition section to provide a more uniform velocity profile in the throat. These hydraulic design features result in very accurate, reliable, and wide-ranging flow measurements.

Flow Tube

Modified Venturi


The UVT has a cylindrical inlet with a static pressure tap, a transition section employing two constriction angles of 40° and 7° to condition the flow, and a cylindrical throat section of sufficient length to install a static pressure tap. This unique design provides the advantages of a “true” venturi meter at reasonable cost, not previously possible in differential pressure primary meters. Unlike flow tubes on the market, the BIF modified Venturi design utilizes our documented and extensively tested corner inlet tap. Slightly reducing the installed accuracy in favor of greater flexibility and cost savings, for the many applications that can benefit from or require these features. The BIF corner tap design performance, however, unlike flow tubes, adheres to all other “true venturi“ principles. The UVT offers a true static pressure tap at the throat location, inlet flow conditioning, and an otherwise full hydraulic shape, well known and proven, thereby continuing to offer all other benefits of the Universal Venturi Tube.