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General:
Furnish and install as shown on the drawings a fl ow element of the Venturi Nozzle design differential pressure type as manufactured by Preso.
Configuration:
The Venturi inlet section shall be built with a precise smooth contoured radius section causing a uniform change in fl uid velocity, and to prevent a permanent pressure loss on 3% at 0.75 beta. The beta ratio shall be selected by the manufacturer according to standard engineering formulas. The discharge coeffi cient (Cd) shall be linear and stable in the operating fl ow range.
Materials:

The construction shall be with an inlet and outlet section with insert style wafer holding fl ange all of 304 stainless steel with instrument connections and instrument valves selected to meet the intended service conditions. Identifi cation tag shall be provided as required.