Desmi Pumps in operation at LHCA P4 & P6 TE/CRG-me Steffen Junker OMP May 2017

History of Desmi oil pumps presentations OMP 10-05-2012 OMP 10-05-12 Oil pumps 31-01-2013 MEOMP20130131-Desmi 07-09-2015 MEOMP20150907-critical spare-parts CPMA 10-03-2015 MECPMA20150310

Introduction : Desmi QSCA-4/6 Main task: In order to control the compressor temperature, oil is injected into the compressor press room by the Desmi pump which provides the required oil pressure Main issues: No spare DESMI oil pumps; No identical oil pump can be bought; Oil pumps working point close to cavitation zone; Several bearings and shaft seal issues noted; All low stage compressors may run without DESMI oil pump, But operation of high stage compressors is significant reduced.

Proposal Actually installed pump type Alternative pump type Costs for Kral vertical in-line volumetric pump with magnetic coupling Advantages. No additional space needed; Minor pipe modification required; Thanks to magnetic coupling no shaft seal issue; Constant flow independent of pressure drop no cavitation issue Dis-advantage: - Soft-starter required Desmi vertical in-line centrifugal pump Costs for alternative Kral pump type KV-550 to replace Desmi NSL80 (Booster) 12kCH without soft-starter alternative Kral pump type CGV-1101 to replace Desmi SL125 oil pump (High stage) 26kCH without soft-starter

Conclusion Proposal based according to the good experience coming from Atlas MR compressor station where the centrifugal pump was replaced by a volumetric pump including a magnetic coupling. CRG-ME suggests to replace during YETS 2017-2018 at one compressor station (P4 or P6) the Desmi pumps with Kral pumps. Advantages: Desmi spare pumps would be available; Only insert Kral pump is required to fulfill spare part request (Spare motor to be checked with CE). 01/09/2014 TE/CRG-me SJ

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