THE WILSON FLOWGRID
The Wilson Flowgrid (WFG) and Wilson Radial Flowgrid (WRFG) have been manufactured since the 1960’s and have proven to be easy to install and maintain, complying with BS, ISO and EPA standards of air measurement. Wilson Flowgrids are constructed from stainless steel, Grade 321 and bespoke systems can be manufactured to meet customer specification, including High Temperature and Polypropylene systems for harsh chemical environments. They can also be supplied in duct with any flange system and flow straightener. Our flow grids (also commonly known as pitot arrays’) are manufactured into two different shapes; Rectangular Wilson Flowgrids consist of a row of vertical tubes, with alternate rows of holes facing up & down stream, measuring the total and sub-static pressures. Two tubes run horizontally, one connected to the upstream & one to the downstream tubes, generating two averaged signals. Radial Wilson Flowgrids are arranged in a similar way, only each tube protrudes from a centre boss, in which the signals are averaged. They produce average total and sub-static pressure signals to generate an enhanced velocity pressure signal, outside the duct wall, that directly relates to volume flow. Providing accurate and reliable outputs where other flow measuring stations’ are found to be unsatisfactory.