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FIGURE 8: Pipe Separation for Processor <br /> 15' MINIMUM <br /> VAPOR RETURN SEPARATION VAPOR PIPE TO <br /> PIPING FROM VCS 100 PROCESSOR <br /> DISPENSERS <br /> UST TANK(S) <br /> 7.2.2 Vapor pipe must rise continuously from storage tank ullage <br /> connection to processor connection, and it needs to be supported to <br /> prevent trapping liquid in droops or sags in the pipe. Pipe slope <br /> must be at least 1/8" per foot, but a slope of 1/4" per foot is <br /> recommended. Also be sure to put a pipe support close to the <br /> processor to prevent placing undue stress on the Turbine. <br /> 7.2.3 Vapor pipe configuration must prevent liquid gasoline from reaching <br /> processor. Acceptable solutions include locating the processor 12 <br /> ft. above grade, connecting the vapor pipe to the top of the vent <br /> pipes, and installing a 12 ft. high loop. See FIGURES 1, 2, 3, and 4. <br /> 7.2.4 Vapor pipe connection at the processor is with (3) 3/4" NPT nipples, <br /> (1) 3/4" NPT lockable ball valve, (1) 3/4" NPT union, and (1) 3/4" <br /> NPT to 2" NPT bell reducer. Note: The ball valve is installed in the <br /> vapor pipe at the processor for maintenance and repair. The ball <br /> valve is to be left in the locked open position (Opened to UST <br /> Ullage) during normal operation. Failure to leave valve in an open <br /> position may result in a processor malfuntion. Note, use no more <br /> than a 12" length of 3/4" piping components. See FIGURE 9 for <br /> details. <br /> Page 14-11 <br /> ARB Approved IOM-14—Hirt VCS 100 Processor Installation Manual—Executive Order VR-205-B <br />