Screw pump Series ALLFUEL AFI-F/AFI-T

1 Screw pumpSeries ALLFUEL AFI-F/AFI-T 1 - Ident-Nr. 488 083 UtilizationStructural designSingle unit AFI-F:Internal-bearing, three- Screw , self-priming Screw and polished spindles run in an exchangeablecasing insert. The drive spindle is hydraulically special starting Screw absorbs the axial thrust of the idlerscrews. It is hydraulically driven. Only the torque resultingfrom liquid friction is transferred to the thread flanks. Thethread flanks are therefore virtually free of loads and arenot subject to wear. The pumped liquid lubricates all slidingparts and can be categorized as full fluid friction. In sizes10 and 20 a balancing piston running in the bearing ringFor pumping heating oils, lubrication oils, hydraulic oils, orother lubricating liquids.

2 The pumped liquids may notcontain any abrasive components nor chemically attack thepump Injection (AFI) pumps are employed as transfer,booster and burner operation pumps in oil-fired systems,as feeder and filling pumps in tank systems and as lube-oilpumps in virtually all areas of industry. They are also usedto generate pressure in oil-hydraulic systems of all single or twin units, vertical design with inte-grated = Twin unit with filter;F = Single unit with filterTheoretical capacity Qat 1/min and46-degree pitch angleG = internal plain bearing; U = antifriction bearingUnheated, uncooled mechanical shaft sealVersion with electric heating of mechanical seal and filterhousing available at additional charge[l/min]Main field of applicationDesignAbbreviation Series (Injection)VersionSizeSpindel pitch direction(R = right)Spindel pitch angle(degrees)Bearing typeShaft sealMaterial codeHeatingAFIT 10 R 38 G 19US W195 EjklmnjklmnAFI-FFilter unitAFI-TTwin unit with filterprovides radial and axial bearing of the drive spindle;in size 40 a groove ball bearing fulfils this maintenance-free mechanical seal seals the return bore connects the seal chamber and the suctionarea to each other.

3 As a result, only suction pressureacts on the shaft seal, regardless of discharge a complete pump/motor assembly is delivered, apump bracket connects the pump to the drive unit AFI-T:Two AFI-F single units (as described above) are attachedto a shared reversing valve housing. A ball valve, twonon-return valves and the pressure relief valve arelocated in the reversing valve housing. This design letsthe operator switch the individual pump units as desiredor remove a pump without interrupting to 112 l/minSuction pressurepup to5 barDischarge pressurepup to40 barThe shaft is sealed with a maintenance-free, unbalancedmechanical ringsilicon carbideCounter ringSeal ringFPM (Viton)SpringCrNiMo steelMetal partsCrNiMo steelThe design and operation of the Screw pump enable avery low noise level and virtually pulsation-free of a lubricating film between the slidingsurfaces is the most important factor in the functionalityof a mechanical seal.

4 This film is formed by the liquidbeing sealed. Due to elevated pressure inside thesuction chamber, a small amount of liquid/lubricant willbe continuously pushed out through the sliding "standard leak" of a few ml/h is essential for main-taining lubrication of the sliding surfaces. Absence orinadequate formation of a lubricating film is a commoncause of damage (see following diagram).Performance dataNoise level and pulsationLeaksjkjsdDischarge flangenominal diameterDN 20 up to25 mmdPart nameMaterial designFunctionalityFilterSingle unit AFI-F:Specially-shaped thread flanks cause the three spindlesto form sealed chambers; rotation of the spindles thencauses the contents of the chambers to movecontinuously in the axial direction from the pump'ssuction side to its pressure side.

5 Despite rotation of thespindles, no turbulence results. The uniform chambervolumes eliminate crushing unit AFI-T:Both pumps can be switched either manually or auto-matically (refer to Operational monitoring/Switchingdevice for information on automatic switching). Theworking pressure building in the pressure area opens thenon-return valve of the pump that is currently runningand closes the same device on the stopped pump. Thisprevents the reserve pump from running pump/motor assemblies are of a vertical design andare delivered with mounting feet and oil sump (twin unitsonly).The pumps are delivered with an integrated radial screenfilter for protection against contamination. The pumpsucks the liquid through the filter, whereby the flowmoves from inside the filter to outside.

6 Filter mesh heating is required, these pumps can be delivered withelectric heating cartridges for the mechanical sealchamber and heating shells for the filter housing (subjectto additional cost).Heating capacity is dimensioned so that the heater mustoperate for at least 60 minutes in order to achieve anoutlet temperature of 20 C. When temperatures arelower (below 0 C), a correspondingly longer heat-uptime will be required. Heating is not designed to achievenoticeably higher liquid temperatures during and pressure ports as counter flange based onSAE (SAE J518C, hole pattern 3000 PSI).Connections at present:B7 DrainingE7 Venting of pumpE8 Venting of filterH7 Heating cartridgeM1, M2, M3 PressuregaugeAt n = 2900 1/min and= 750 mm /s2 HeatingFlanges and connectionsShaft sealLiquid temperaturetup to 150 CViscosity range3 up to 750 mm /ssilicon carbidelkl 2 Refer to the individual reference curves for the achievablepump pressure in relation to viscosity and rotational specifications are applicable only to nearly staticpressure loads.

7 Please inquire about dynamically alternatingpressure required if temperatures higherInstallation2 - Ident-Nr. 488 083 Series ALLFUEL AFI-F/AFI-T PumpsizeConnectionforHeating car-tridge output(pressure side)Heating shelloutput(filter)10230 V160 W165 W20230 V200 W205 W40230 V-265 W3 Series ALLFUEL AFI-F/AFI-T - Ident-Nr. 488 083 Theoretical average leak rate depending on mechanical oscil-lations, fluid properties, condition of the sliding surfaces, etc.(Source: Burgmann ABC der Gleitringdichtungen)When pumping liquids with low volatility, such as HFO,the user must therefore expect increasing deposits onthe atmosphere side as time passes. As a result, it isphysically not possible to achieve a 100% seal with amechanical seal.

8 If this is not acceptable, the magneti-cally-coupled version of ALLFUEL will be the following motor versions are normally provided withdelivery of complete pump/motor assemblies:Surface-cooled three-phase squirrel-cage motors, IMV 1design type, IP 55 protection class according to IECstandard, insulation class F utilized according to B,output and main dimensions according to DIN 42 configured for 50 Hz may also be operated in60 Hz Voltage/connection:50220-240/380-420 Europe50380-420/660-720 Europe50500 Europe60254-277/440-480 USA60440-480 USA60318-346/550-600 Canada60220-240/380-420 Asia, is transferred over an elastic coupling. Additionalradial forces may not act on the drive [Hz] Voltage [V]Areas of usageOverload protectionExplosion protectionA pressure-relief valve is integrated into each pump as ameans of overload protection.

9 Its standard triggerpressure is set to approximately 10% above the workingpressure. Please make sure your order specifies if adifferent trigger pressure is pump fulfills the requirements according toEU explosion-protection directive 94/9/EC (ATEX100a) for devices in device class II, category2 G. Classification into temperature classes according toEN 13463-1 depends on the temperature of the pumpedliquid. Refer to the proposal or order documentation forthe maximum permissible liquid temperature for therespective temperature operating the pump in category 2, suitablemeasures must be provided to prevent impermissiblewarming of the pump surfaces in the event of side:Pressure-vacuum gaugePressure side: Pressure gauge (included with deliveryas required)The pressure-vacuum gauges display the pressuredownstream of the filters.

10 This enables measurement ofpressure loss in the filter and detection of impermissiblecontamination. In addition, connections M1 and M3permit precise detection of differential switching device is available at extra cost. It providesoperational monitoring and is designed to automaticallyswitch on the reserve pump if the operational pump lamps indicate current operational devicefor motors up to 3 kW (400 Voperational voltage) for switching on pump directly,consisting of:1 steel casing, IP55 protection class, dimensions:width 320 mm, height 320 mm, depth 160 mm2 three-phase air-gap relays with overload relay1 selector switch (pump 1, pump 2 and OFF)2 green signal lamps Normal operation 1 red signal lamp Disturbance control fuse, connection terminals for all incoming andoutgoing lines2 control-line terminals for connection of any additionalcommand unitsSwitching devicefor motors with and kWoutput power (400 V operational voltage), suitable forstar-delta switching, consisting of:1 steel casing, IP55 protection class, dimensions.