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

What is the difference between differential pressure Δp and permanent pressure loss?

The differential pressure Δp is the differential pressure measured across the restriction, which is converted to a flow rate by a differential pressure transmitter (pressure drop inside the meter section). The difference between the upstream pressure ...

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What is the flow coefficient Cv?

The flow coefficient Cv determines the ratio between the actual flow rate and the theoretically possible flow rate. Different primary flow elements that have the same geometrical form, under the same flow conditions and with equivalent Reynolds numbe ...

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Is a calibration required with a primary flow element?

With primary flow elements that have been manufactured to the defined tolerances no calibration is required. A calibration is generally required for applications where a higher measurement accuracy is required, e.g. for custody transfer or performanc ...

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