slide gates
DESCRIPTION
Slide gatesTRANSCRIPT
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
Correct Choice of Gate
Slide Gate
To correctly choose a slide gate, the following need to be established: SizePressureRequiredtightnessWhatisthefunctionofthegate?Howoftenwillthegateoperate-openorclose?Whatdegreeofserviceabilitydoestheuserwant?Thesubstance,inwhichthegatemustoperateChoiceofmaterial
How is the gate to be driven or moved? OperatedbyhandElectricallydriven:On-OffElectricallydriven:Regulated4-20mA PneumaticallydrivenHydraulicallydriven
Ifhydraulicsischosenasthedrivingdevice,itispossibletoinstallanautomaticfunctionforopeningorclosing,whichcanbeusedasasafetyfunctionaswell.
Where in the structure is the gate placed? Ifthegateisplacedonawallwithamplespaceinalldirections,allgatetypescanbeused.
If,however,thegateisplacedatthebottomofastructureandyoualsowantwaterandimpuritiestopass unrestrictedthroughthegate,atypeofgate,thatcanmeetthedesiredrequirements,mustbechosen.
Ifthegatecangetsubmerged,itisnecessarytoconsiderwheretoplacethedrivingdevicetoopenand closethegate.
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
Slide gate, tightness acc. to DIN 19569-4
Table 1: Classes of tightness with examples for use(Freely translated from German: Tabelle 1: Dichtheitsklassen mit Anwendungsbeispielen)
Class Maximum allowed leakage in litres per sec. per metre gasket length (l/s/m)
Examples of use with pressure on front
Recommended gate types from Gerhardt Christensen
above0.3to PlankgateDistributiongate
Type3
2 above0.to0.3 GatePlate
Type
3 above0.05to0. Non-returnflapsSlideGat
TypeKVType7.3-Type5
4 above0.02to0.05 Slidegate Type7.4-TypeIITypeIIL
5 to0.02 Slidegate(Drip-tight TypeII-TypeIIL
Note:Forpressureontherear,ahigherclassforleakagesmustgenerallybeapplied.
How tight must a gate be? Tight,alittleleaky,prettytight,drip-tightorHowtightdoesthegate,whichistobeused,needtobe?
Inthefollowing,itwillbemadeprobable,whattightis.
Atapoverahandbasinsuppliesanamountofwaterequalto0.l/s=6litres/min.
How much leakage is acceptable from a slide gate?ExampleSlidegateclass4,insidemeasure500x500mmYoucanfindthelowerandupperlimitsforleakageforclass4inthetable.Lowerlimit=0.02l/s/m,upper=0.05l/s/m.
Theleakagemustbewithin:Lowerlimit0.02x(0.5x4)=0.04litres/sec.=2.4litres/mintoUpperlimit0.05x(0.5x4)=0.litres/sec.=6.0litres/min.
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
ExampleSlidegateclass4,insidemeasure,000x,000mm.Youcanfindthelowerandupperlimitsforleakageforclass4inthetable.Lower=0.02l/s/m,upper=0.05l/s/m.
Theleakagemustbewithin:Lowerlimit0.02x(.0x4)=0.08litres/sec.=4.8litres/mintoUpperlimit0.05x(.0x4)=0.2litres/sec.=2litres/min.
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
Slide gate, choice of material
Type of gate Gate frame Gate plate Spindle Spindle nut PP - guideway Gasket
BlockingGateType
RS Alu/RS - - PEHD -
PlankGateType3
RS Alu/RS A4 RS PEHD N250/N506
DropgateType5
RS RS A4 BronzeRG7
PEHD N250
SlideGateType7.3
RS RS A4 BronzeRG7
PEHD N250/N506
SlideGateType7.4
RS RS A4 BronzeRG7
PEHD N250/N506
SlideGateTypeII
RS RS A4 BronzeRG7
- NBR
SlideGateTypeIIL
RS RS A4 BronzeRG7
- NBR
Slidevalves RS RS A4 BronzeRG7
- NBR
Pivotgate RS RS A4 BronzeRG7
- N250
RS:StainlesssteelAISI304/WST.430,AISI36L/WST.4404,AISI36/WST.4435,AISI36L/WST.4436orasrequired.
Alu:AlMg3sea-water-resistantaluminium.
Gerhardt Christensen A/S produces the following types of gates: BlockinggateTypePlankgateType3DropgateType5SlidegateType7.3SlidegateType7.4SlidegateTypeIISlidegateTypeIILSlidevalvesPivotgate
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
Gates
Blocking gates Type 1 BlockinggateTypeisalow-costgate,whichsealing-wiseperformsbestinuntreatedsewage.
Thistypeissuitablefortemporaryblocking,wheredrainageisnecessaryinordertoserviceamachine orsimilar.
Seal:ThegateplateslidesinaPP-guideway.
Thegateframecanbeconcretedinorboltedon.
Ifthegateframeisconcreted-influshwiththebottomofthecanal,theguidewaymustbecleanedprior toplacementofthegateplate.
Thegateplateisinonepiece.
Material:Stainlesssteeloraluminium.
Ifthereareseveralsimilarblockings,thesamegateplatecanbeusedinallguideways.
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
Plank gate Type 3 Thistypeissuitablefortemporaryblocking,wheredrainageisnecessaryinordertoservice amachineorsimilar.
Seal:2verticallipseals;thehorizontalsealinthebottomisacompressionseal.
Thegateframecanbeconcretedinorboltedon.
Thebottomoftheframecanbeplacedflushwiththebottomofthecanal.Theadvantage ofthisdesignisthatimpurities,sandandthelikedonotbuildupbeforeorafterthegate.
Thegateplatemaybedividedorinonepiece.
Materialstainlesssteeloraluminium.
GateframewithPP-guidewayandlipsealcanbeconcretedinorboltedon.
Ifthereareseveralsimilarblockings,thesamegateplatecanbeusedinallguideways.
Thegateplateisforcedagainstthebottomsealoftheframeusingathreadedspindle.
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Gerhardt Christensen A/S Landholmvej 10 DK-9280 Storvorde Tel. +45 9831 6767 Fax +45 9831 6733 [email protected] www.gc.dk
Type.0forconcretingintocanal
Type.forboltingontowallType
.2forbolting-onincanal
DimensionaloutlineType