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Seal Gas Booster System
� � � Increased production � � � Higher efficiency� � � Compliance with environmental regulations� � � Availability and Reliability � � � Life extension
Centrifugal Compressors equipped with Dry Gas Seals (DGS) use process gas as the seal gas. During normal operation, the compressor pressure andtemperature ratio maintain a positive flow to the DGS and avoidcontamination and condensation. However, during standstill conditions,this auto-buffering is not possible and the DGS is at risk fromcontamination especially by heavy hydrocarbon condensate. To mitigatethis risk, depressurizing the compressor after trip is recommended, butflaring of process gas impacts revenues and the environment. In fact, inmany countries, a pollution tax is applied on released process gas.The installation of a Seal Gas Booster allows the compressor to be keptpressurized after a trip, while the DGS remains correctly buffered andready to be restarted.
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The patented Seal Gas BoosterSystem assures a positive flow ofclean, dry seal gas to the DGS duringa compressor shutdown. Heavy HC Seal Gas Booster Systems
can also be equipped with an electric heater to prevent expansionof the gas within the seals fromcreating a condensation condition.
The Seal Gas Booster System consistsof a reciprocating pump driven by twoinstrument air actuated pistons. Thebooster has a unique design in whichthe piston is moved by an externalmagnetic field which eliminates thetraditional rod or other mechanicallink to the driver and thus creates asealless compressor design. Thissimple and rugged design includes acylinder made of non-magneticstainless steel capped with twospecial flanges. Two pneumaticpistons move a taurus-shapedpermanent high-efficiency magnet.The Seal Gas Booster System providesa positive delta pressure (1Bar) whichcreates a barrier to protect thecompressor dry gas seal frompotentially damaging DGS duringshutdown and start up operations. The booster is provided with a purgedstainless steel enclosure with astainless steel pneumatic circuit andis installed on a skid. This enclosureprotects the booster from adverseenvironment conditions such as highhumidity, sandstorms, etc.
Product SpecificationsGeneralProcess side design condition
raB 023erusserp ngiseDraB 525erusserp tset ciluardyH
C° 021erutarepmet ngiseDmc 0091tnemecalpsiD 3
mA 3wolf ngiseD 3/h @ 30 CPMLife without maintenance 8000 hours
Operating Condition
)%57 enahtem( sag larutaNaideMraB 513erusserp gnitarepo xaM
Max operating temperature 110 °CraB 1P atled gnitsooB
Drive side design conditionraB 9 – 4erusserp ria ylppuS
raB 4erusserp ria rotautcAmS 02noitpmusnoc riA 3/h
Connection
JR 0052 ISNAdegnalf edis ssecorPTPNedis evirD
Materials: Process Side
05 CINORTINrednilyCL 613 ISIAspac dnE
noisolpxe itna notiVsgnir-O613 ISIAstlob & stuN
L613PT/613PT 213 A MTSAnoitcennoc ssecorP
Materials: Drive Side
613 ISIArotautcA613 ISIAstnenopmoc citamuenP
nolfeTslaes notsiP
GE Oil & Gas
via Felice Matteucci, 250127 Florence - ItalyT +39 055 4272500F +39 055 4232800Nuovo Pignone S.p.A.Nuovo Pignone S.r.l.
E [email protected]/oilandgas
COMK/MARK 839/II - Designed by: Studio Tre FasiPrinted by: Sagraf - 01-2010©2011 Nuovo Pignone S.p.A. All Rights Reserved
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