Discover the PVC/PTFE Orifice Plate Flowmeters, designed for gases and liquids. Available in sizes from 1/2" to 24", they ensure reliable flow measurement with easy installation. PVC orifice plate flowmeter, 8" line size, 4.000" bore, 0.5 Beta, water capacity: 100" d.p. W/C, 565.77 GPM flow; air capacity: 2014.95 SCFM @ 14.7 psia, 3241.45 SCFM @ 20 psig, 6034.85 SCFM @ 100 psig; 5 lb.