Laserfiche WebLink
T1 _ S4 /L't <br /> Appendix B <br /> 71 SO Overfill Valve in Tank Initial Shut off Level Worksheet <br /> Important: This is eant to be supplemental worksheet and not a substitute to following the installation <br /> manual instructions. All length measurements are in inches. Please contact the Authority Having Jurisdic- <br /> tion(AHA and review local,state,and national codes to determine the regulatory requirements governing <br /> shut-off capacity hi your region,as well as take into account other considerations such as extreme tank tilt. <br /> Take the following measurements with the valve in- <br /> stalled in the tank: <br /> Distance from the?l SO inlet tube flange to the Last <br /> c <br /> lug in the 71 SO boi Jy(see figures),upper tube length. a <br /> Note: the Upper Tu be Length must be at least 16"to in- <br /> clude the protectivE bend in the tube. f`> <br /> Distance from the 7 1 SO inlet tube flange to the top and <br /> bottom of lower to be,valve length'. A <br /> a g <br /> (W)= If 4t (D) <br /> (U) " Upper <br /> Tube <br /> Distance from the 71 SO inlet tube flange to the bottom <br /> I' <br /> of the tank. Note:If a tank bottom protector is present it = 1 <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 &61TP Models add 0.6") (W)Valve <br /> (B) 179 <br /> Length, I q <br /> bottom of- <br /> From the tank calibration chart provided by tank manu- cut <br /> facturer find the di stick number(Y)which corresponds <br /> to the 100%volum (B) ,ll <br /> (Y)= 3 " To Tank \ �y <br /> `!-q 4-6 \: - Mjl <br /> 1. To determine but-off percentage: I� Tank <br /> Subtract upper tub length (D)from distance to tank (U)Valve q Chart Mj <br /> bottom (B) / Length, 1'I- 100% <br /> (X)=(B)—(D)-2" (��yy �}� Z= l0�/��y top of cut Volume i' <br /> = 1 y/ 95 Dipstick 4 <br /> Using the tank calibration chart provided by the tank i f <br /> manufacturer determine the tank capacity at the cal- I : <br /> culated (X)dimension and the 100%volume(Y)tank <br /> capacity. s �� <br /> (X)tank capacity in gallons=_ <br /> (Y)tank capacity in gallons <br /> SO%=(X)capacit /(Y)capacity x100= y- Y <br /> Note: The overfill valve must be installed per AHJ require- <br /> ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- <br /> /OC) _ y- 7-It age the overfill valve must be removed and replaced. For <br /> reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />