Steam joint and stationary siphon â for optimum dryer ... - Voith

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Steam joint and stationary siphon –for optimum dryer performanceThe stationary siphon is suitable for every application as long as thesteam joint can be soundly mounted to the bearing or gearbox cover.It is likewise suitable for low operating speeds and sump condition asit is for highest operating speeds and rimming condition.In all cases the differential pressure is minimal since it is independentof any centrifugal forces. The siphon shoe remains always in thecondensate, flooding of dryers is, therefore, not possible.A temperature stable siphon support pipe, firmly held inside of thesteam joint, keeps the siphon shoe at the proper clearance to thedryer shell as set when the dryer is cold. Optimum effectivenessDifferential pressure and blowthroughsteam flow stay constant atapprox. 150 mbar (2.3 psi) and 5%for all speeds.In comparison to a rotating siphonat 1400 m/min (4600 fpm) it isapprox. 800 mbar (12 psi) and 30%.Carbon ring sealn The glide ring compensates forradial misalignmentn The spherical piston compensatesangular misalignmentn Large carbon wear reserven Status of carbon wear is visibleand measurablen A mechanical stop preventsmetal-to-metal contactn Spring loading for negativeoperating pressures
Carbon ring changen Removal of elbow and housingn Replacement of the carbon ringn Re-installation of housing andelbown Adjustment of stop pins forcarbon wearOverhaul of the housingn Insertion into the pistonpush-down devicen Removal of the pistonn Replacement of the seal ringAvailable sizesn Steam connections:50 / 65 / 80 / 100 / 125 / 150 mm2“ / 21/2“ / 3“ / 4“ / 5“ / 6“n Condensate connections:32 / 40 / 50 / 65 / 80 mm11/4“ / 11/2“ / 2“ / 21/2“ / 3“n Siphon diameters:16 / 19 / 22 / 26 / 29 / 32 mm.63“ / .75“ / .87“ / 1“ / 1.14“ / 1.26“Insulation sleeveInsulation sleeves protect the dryerbearing from heatSpecial designsn Steam inlet only, as a rule ondrive siden Condensate outlet only, as arule on tending side.On tending side with extendedpiston length for CARB**(Compact Angular RollerBearing) bearings, for compensationof dryer expansion** SKF TrademarkImportant featuresn Two anchor rods - due to theirlength insensible againsttemperature variations - hold thesiphon support pipe securely inits position.n The entering steam flows alongthe support pipe on both in- andoutsides and the condensateflows back in a separate pipe.Thus, the support pipe is notinfluenced by temperaturedifferences between steam andcondensate and is, therefore,temperature stable.n The siphon holder can be madehorizontally adjustable. This canbe advantageous when there isonly unreliable informationavailable about the location ofthe balancing weights inside ofthe dryer.n The siphon pipe can bearranged vertically as well asinclined in order to place thesiphon shoe as close aspossible to the end of thedryer shell at a given dryerhead contour.n The siphon shoe is made ofTeflon and prevents the dryershell from being damaged,should both get in contact.n A whirl chamber in the siphonshoe assures safe condensateremoval at lowest differentialpressures and blow-throughsteam flows.
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Steam joint and stationary siphon â for optimum dryer ... - Voith