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I <br /> IM <br /> Drop Tubes <br /> OPW 61-T <br /> The OP W 61-T Drop Tube is inserted <br /> in the underground storage tank riser <br /> pipe to permit the efficient delivery of Dimensions <br /> fuel. Delivery is speeded and less Product No. Riser Pipe <br /> vapor is generated with submerged fil- <br /> ling using the DPW 61-T.The DPW 61- &Suffix Size Length Wt. <br /> T is flared at the upper end and rests 61T-7244 3" 10' 3.14 <br /> on top of the fill pipe, the OPW tight 61T-7266 4" 10' 5.12 <br /> fill adaptor screws into the riser,hold- 61T-7268 4" 12' 6.18 <br /> i ng the d rop tu be i n place.The bottom 61T-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 /> Vapor Vents <br /> OPW 23 <br /> The DPW 23 Vent has an aluminum <br /> z. <br /> body and a 40-mesh brass screen.The <br /> DPW 23 is an open vent and directs <br /> vapors upward in accordance with l` v <br /> NFPA Code 30. Set screws make in- <br /> rstallation easy. Available in 1 Y2", 2" <br /> and 3" sizes. <br /> OPW 523 <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 <br /> ting and a 1/2 oz. vacuum setting. OPW 523 <br /> The 523 is available in 2"size,and is <br /> attached to the 2"threaded vent pipe. <br /> Dimensions <br /> OPW 523-.S Product No. <br /> The DPW 523-S Pressure Vacuum &Suffix Size Wt <br /> Vent is similar to the 523 above,except 23-0044 <br /> it is attached to the vent line with set 23-0033 2" 0 23 <br /> screws rather than pipe threads. A 23-0055 <br /> gasket is provided. <br /> 523-1100 2" 0 85 <br /> Available in 2" size. 523-S-1150 2" <br /> 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 /> 6t., <br /> 22 <br />