Flowserve P-200 Durametallic Manual de usuario descargar pdf (Pagina 8)

3.3 For dual pressurized seal (double seal) operation, supply a clean

compatiblebarrieruidtotheinletportatapressureatleast

170kPa(25psi)abovethesealchamberpressure.SeeFigure5.

Thepressureofthebarrieruidmustnotexceedtherecommended

maximumpressure.Flowservecansupplyinformationonbarrier 

uidowrequirementsbasedonsealsize,producttemperature, 

barrieruidcharacteristics,andshaftspeed.

3.4 For dual unpressurized (tandem seal) operation, supply a clean

compatiblebufferuidtotheinletportatapressurebelowtheseal

chamberpressure.SeeFigure6.Thepressureintheseal

chambermustnotexceedtherecommendedmaximumpressure. 

Flowservecansupplyinformationonbufferuidowrequirements

basedonsealsize,producttemperature,bufferuidcharacteris-

tics, and shaft speed.

3.5 TheFlowservesupplytankisdesignedtoworkwiththeP-200 

seal to form a self-contained sealing system. The circulating

featureintheP-200providesapositivebuffer/barrieruidow

fromthesealcavitytothesupplytankandbacktotheseal.

Inmostcasesthenaturalcoolingofthepipingandtankare

adequatetoremoveseal-generatedheat.Coolingcoilsare

availablewiththesupplytanktoextendoperatinglimits. 

ThesupplytankcanbeusedwiththeP-200sealinthedual

pressurized,Figure5,ordualunpressurized,Figure6, 

operating modes.

Recommendation: For enhanced seal performance and reduced

coking,useDuraClearasabarrieruid.RefertoDuraClearbrochure

FSD123orcontactaFlowservesealapplicationengineerforfurther

details.

3.6 Goodpipingpractices:     

• minimizelinelosses     

• uselargediametertubing     

• onlyupwardslopinglines     

• uselongradiusbends     

• minimizecomponentlosses    

• optimizeforthermosyphon    

• checkrotationdirection    

• testforleaks

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Flowserve P-200 Durametallic Manual de usuario Pagina 8