Venturi Primary Flow Elements

The HVT-Halmi Venturi Flow Element design, developed and perfected by Dezsoe Halmi, founder of Primary Flow Signal, Inc., is a proprietary design offered exclusively by the company for high accuracy and high reliability flow measurement of pressurized line fluids including liquids, gasses, and steam.


In its embodiment as the HVT-SM Sealed Metering System, this revolutionary design accommodates flow measurement of high viscosity line fluids, solids bearing line fluids as well as harsh and/or contaminated line fluids.


This design is also available in the rectangular configuration for conduits shaped thusly.


This design is available in a variety of configurations, including cast iron pressure vessel, fabricated (welded) metal pressure vessel, plastic insert style, welded insert style, and welded-in pressure vessel style. Additionally, the HVT is offered as a cast in place (usually concrete and typically rectangular) configuration. PFS, Inc. Applications specialists can help you select from the wide range of standard product configurations that we have available, or our engineers can custom tailor a solution for your specific and unique application requirements.


This basic design has numerous embodiments that are each intended for certain very specific application conditions. To access more information on the HVT-Halmi Venturi Meter, please view the following subjects, or contact us.



Additional Information

    HVT - GENERAL INFORMATION
    A brief descirption of the HVT-Halmi Venturi meter along with links to additional information and features and benifits of the design.

    HVT-CI CAPACITY TABLE
    Capacity table for the HVT-CI cast iron meter referenced on water. Useful in sizing standard Beta HVT's for field applications.

    HVT-PI CAPACITY TABLE
    Capacity table for HVT-PI plastic insert style meters referenced on water. Useful in sizing standard Beta insert HVT's for field applications.

    Features and Benifits of the HVT-Halmi Venturi
    A concise and to the point listing of the benefits associated with HVT-Halmi Venturi metering.

    The HVT Flow Metering Mechanism
    An excellent resource for understanding the reason behind why the HVT design works.

    HVT Design Tools
    Provides a working knowledge of the flow equations that describe the operation of the HVT, as well as valuable installation effect information.

    "C" Accuracy and Reliability
    A clear forthright explanation of the meaning and effect of discharge coefficient. accuracy and reliability, together with substantiation data for 2-Sigma.