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02x22./99 18:03 <br /> t•!Q.121_.h Purl <br /> 8 NPTthreaded Threadprepsratlon <br /> connections Inspect threads on fiberglass adapters and threaded bushings. <br /> Do act use if threads are damaged- <br /> ■ Inspect threads on steal fittings for burrs_ <br /> ■ Remove burrs from steel fittings by malting up to mating steel tttreads.Urmake <br /> the stael fitting and reinspect, <br /> r— —————--————— Always dry fit fiberglass and steel threads without sealing compound.It should <br /> be possible to dry fit the threads as shown in the following table.If the proper <br /> fIn general,threaded fora ad es;i � number of threads cannot be made up,select a new steel fitting. <br /> sPtvtrld be made up befrar+3 adhesiv:1 <br /> bonded joints to minimize the Making the joint <br /> j possibility of damage to bonded joirAs I Threads ntust be clean and dry bolos applying thread-sealing compound. <br /> j caused by torquing the threaded I <br /> j connections,However,when installing I Use a nonhardening,solvent-fres Teflon bas(4 thread sealant such as Joiner <br /> j I Seal-1 lie Heavyweight"Or Gasoil8 Soft Set pipe sealant. <br /> molded threaded bushings(tapered <br /> j major nominal pipe size x threaded { Apply sealing compound W male ard female threads. <br /> minor nominal pipe size)make the I Hand tighten the joint,than Threads Dry Fit and to Seal T� <br /> I tapered honded joint first and allow it I use a wrench to gest full <br /> j to cure before making up the threaded j make-up.Standard pipe Nominal <br /> Ia j wrenches car,be used with Pi Size <br /> Tiljoint.This order of)dint make-cop will p - Tito Additional <br /> I ( care on fiberglass adapters: tin) linin) Dry Fit Threads to Seal <br /> prevent damage to the bustung. j Do not overtighten. - - <br /> t; 40 4-5 3 <br /> I <br /> L—r-----------.� he parts should make up 2 50 4-5 3 <br /> the number of threads 3 $0 5-6 3 <br /> shown in the sable above. 4 100 (3-7 2 <br /> Otherwise,a proper seal 6 150 __- 7-8—�--- 2 <br /> may not be effected when --- <br /> tightened, <br /> Isolating flex conne-utors atihe shear valve <br /> When flex connectors are directly buried at the dispenser,regulations frequentlyI MT <br /> r — , require that they be cathodicaily protKted and provisions be made to avoid stray <br /> I Never use a pipe 1 <br /> { wrench directly on the I current electrolysis and corrt ;on.In such cases the flex connector must be electrically <br /> pipe:wrench up only isolated from the shear valve and from cc <br /> other metallic xnponents in the", till, <br /> { on adapters. j Experience hes shown that nylon isolation adapters do not perform well inasmuch as <br /> the pour mechanical strength of the material results in creep or thread deformation with <br /> L—--——————- subsequent leakage. <br /> Ameron manuf-acturasa i tai NPTfemale x 11,1 NPTn-k*fiberglas„ reinforced <br /> isolation adapter witich may be nia.lnted between the flex connector and the shear <br /> valve. Follow the�tr^e general installation pra*cfur eS as with other NIIC threaded <br /> fittings Afterapplyirg the sealing compound,hand tighten the adapter-Final make-up <br /> requires 1'r.to2 zddilienal turns. <br /> Shear valve <br /> .r 1 th NPT female <br /> 2'r$ <br /> t+r ---- DuabY isolation <br /> w�'r <br /> � R) adapter <br /> Fig 8.1.7i»Ame+onirberg(sss-rtinforr:ed <br /> isolation adapleris mounted between the <br /> 17 axconneclorandtheshoarvalve. zY+ t'/a <br /> i <br /> ftek c(minector <br /> t h NPT 11h NPT r-ole <br /> female boat ergs <br /> Stsyatt+ersl _-. <br /> I <br /> 12 <br />