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

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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What is the advantage of the compact orifice plate over a measuring flange?

The compact orifice plate integrates the primary flow element and the pressure tappings into a single assembly. In contrast to a measuring flange; fittings, tubing, valves, adapters and brackets can be dispensed with. It can be mounted between standa ...

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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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