AF, AG

Steel venturi with butterfly Valve – sizes 2”-16” 

The AccuSetter uses a low-loss venturi to obtain a measurement accuracy of 3% F. S. The butterfly has a 2” extended neck above the flange for insulation. The valve handle has an infinite-position memory stop for sizes 2” to 6” and a gear operator on 8” to 16” sizes. The total pressure drop added to the pump head seldom exceeds one foot. The exact drop can be calculated using the formula on Form F199.

Flow measurement can be obtained with a differential pressure meter reading across the venturi taps. The GPM can be calculated using the formula on Form F199. (See “Flow Measurement Test Kits,” form F011 for the differential pressure meter kits.) The design flow can be obtained by adjusting the valve operator until the desired GPM is reached. The set handle position is maintained by using the memory stop.