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Froulat) Sej-e,,s <br /> k-vtk� UXA-c,- loo Uwuo r— C-I <br /> Maintenance Inspecting/Verifying 95% Level (Without <br /> The 708-5100 Series Overfill Prevention Valve has no Removing from Tank) <br /> periodic maintenance requirements. FOR DIMENSIONS"A" &"B": Refer to the "installation <br /> However, if the drop tube and valve assembly is removed record sheet" or re-measure and re-calculate per figure 1 <br /> from the tank (for inspection or service), inspect the 1. Measure Dimension "Z" (Figure 18) <br /> drop tube seal for wear/darnage (Figure 161. Replace if <br /> necessary. sr (Upper drop tube flange to -4 <br /> —] edge of upper tube adapter) <br /> 2. Verify using the calculation below <br /> "A (Drop tube seal surface to <br /> 5 <br /> bottom of tank) <br /> ar <br /> " F ) LI <br /> (Subtract) <br /> Drop (95%Volume from tank chart) <br /> Tube Gasket Installed <br /> orientation) <br /> (Subtract) <br /> F4-5*' (114rn (95%Shutoff level offset) <br /> Figure 16:Inspect Gasket (Equals) <br /> Additionally, if the upper or lower drop tube is <br /> unthreaded/removed from the OPV,the O-ring(s)should <br /> be replaced (Figure 17). lJC1 --�— Sarneyal�ueas <br /> indicates correct installation <br /> Inspect 0-ring P. <br /> Measure <br /> ilzl$ <br /> 4112. <br /> (114 mm) <br /> Inspect 0-ring <br /> Figure 17:Inpect O-Rings Figure 18:Dimension Verification After Installation <br />