WIKA

Primary flow elements

Primary flow elements for special requirements

Our portfolio of primary flow elements consists of orifice plates, meter runs, flow nozzles, venturi tubes, pitot tubes, wedge meters, and proprietary designs. 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, and ASME PTC 19.5). We offer calibration certificates in accordance with the ASME PTC6, ASME MFC 3Ma, and ASME PTC 19.5 as well as others by request. With our extensive product range, we are able to cover almost all industrial applications. Customized solutions can be developed to meet your specific needs.
FAQ
FAQ

What is the beta ratio (β)?

The beta ratio (β) defines how strongly the pipe cross-section is restricted. The beta ratio should thus be considered as a factor. A beta ratio of 0.75 corresponds to a restriction of 75 % of the pipe cross-section.

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.

How can the differential pressure be measured with a primary flow element?

In order to measure the differential pressure, a combination of primary flow element and differential pressure transmitter is needed.