Orifice Plate Flowmeter is a complete orifice plate flow metering package. A few applications include steam flow, boiler feedwater, cooling water, and combustion or compressed air. Orifice plate flowmeter, 12" line size, 6.000" bore, 0.50 Beta, water capacity: 100" d.p. W/C, 1271.62 GPM flow; air capacity: 100" d.p. W/C, 4530 SCFM @ 14.7 psia, 7288.16 SCFM @ 20 psig, 13570.33 SCFM @ 100 psig; 30 lb.