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Drop rubes <br /> OPIV 6f -r <br /> The OPW 61-T Drop Tube is inserted <br /> in the undergrou id storage tank riser <br /> pipe to permit the efficient delivery of c <br /> fuel. Delivery is speeded and less Product No. Riser Pipe <br /> vapor is generated with submerged fil- &Suffix Size Length Wt. <br /> ling using the OPW 61 J.The OPW 61- 61 T-7244 3" 10' 3.14 _ <br /> T is flared at the upper end and rests <br /> on top of the fill pipe, the OPW tight 61T-7266 4" 10' 5.12 i <br /> fill adaptor screws into the riser,hold- 61 T-7268 4" 12' 6.18 <br /> ing the drop tube in place.The bottom 61 T-7368 4" 15' 7.65 <br /> of the 61-T is furnished cut straight,but <br /> is generally cut to length on the job-site <br /> at 45°. <br /> The distance from the tank bottom to <br /> the drop tube bottom should be 6" to <br /> 12", or per local requirements. <br /> yT "ap �c:I f c <br /> {-' t "_% <br /> The OPW 23 Vent has an aluminum <br /> body and a 40-mesh brass screen.The <br /> OPW 23 is an open vent and directs <br /> vapors upward in accordance with <br /> NFPA Code 30. Set screws make in- <br /> stallation easy. Available in 11/2', 2" <br /> and 3" sizes. f 4 <br /> The OPW 523 Pressure Vacuum Vent + <br /> is an upward vapor discharge vent and <br /> is available with an 8 oz.pressure set- OPW 23 OPW 523., <br /> ting and a 11 oz. vacuum setting. <br /> The 523 is available in 2"size,and is <br /> attached to the 2"threaded vent pipe. <br /> Product No. <br /> The OPW 523-S Pressure Vacuum &Suffix Size Wt. <br /> Vent is similar to the 523 above,except 23-0044 1111z" 0.27 <br /> it is attached to the vent line with set 23-0033 2" 0.23 <br /> screws rather than pipe threads. A 23-0055 3" 1.02 <br /> gasket is provided. 523-1100 2" 0.85 <br /> Available in 2" size. 523-S-1150 2'' 0.88 <br /> The rated maximum flow pressure <br /> drop for all OPW 523 Vents is 28 oz. <br /> per square inch at 7000 SCFH. <br /> ___ 22 <br />