WIKA

Primary flow elements

Primary flow elements for special requirements

Orifice plates, meter runs, flow and Venturi nozzles, Venturi tubes, pitot tubes and restriction orifices are part of our portfolio of primary flow elements. All our primary flow elements are designed in accordance with the principles and requirements of international standards (ISO 5167/ISO TR 15377, ASME MFC, ASME PTC6, BS 1042, DIN 19206, UNI 10023). We offer calibration certificates in accordance with the ASME PTC6, ISPESL and IBR standards. With our extensive product range we are in a position to cover almost all industrial applications. Customised solutions can be developed to meet your specific needs.
FAQ
FAQ

Where can the discharge coefficients Cv be obtained?

The discharge coefficients Cv can be obtained from the standard (ISO 5167) for nozzles, Venturi tubes and orifice plates that are manufactured to the specified tolerances of the standard.

What are primary flow elements?

Primary flow elements are built into piping systems and generate a defined differential pressure through a partial restriction in cross-section within the flow meter. The square root of this differential pressure is proportional to the flow rate.

Can multi-bore restriction orifices overcome cavitation when high pressure drops are required?

Multi-bore restriction orifices do not solve cavitation problems. However, multi-step type restriction orifices can provide a remedy here.