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2 Desmi Pumps in operation at LHCA P4 & P6TE/CRG-me Steffen Junker OMP May 2017

3 History of Desmi oil pumps presentationsOMP OMP Oil pumps MEOMP Desmi MEOMP critical spare-parts CPMA MECPMA

4 Introduction : Desmi QSCA-4/6Main 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.

5 Proposal Actually installed pump type Alternative pump type Costs forKral 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

6 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 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

7 Many thanks for your attention