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Modernisation of ethane cracker plant in Norway

Hermetic supplies canned motor pumps

Hermetic-Pumpen supplied two 12-stage, sealless, canned motor pumps from the CAM 32/6 + 6 series to Noretyl AS (Ineos) in south-east Norway
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Modernisation of ethane cracker plant in Norway

Hermetic supplies canned motor pumps
07.07.2016 – During the modernisation of an ethane cracker plant, Hermetic-Pumpen GmbH supplied two 12-stage, sealless, canned motor pumps from the CAM 32/6 + 6 series to Noretyl AS (Ineos) in south-east Norway. With this petrochemical plant, the provision of raw materials to the company-owned plastics manufacturers at the integrated site is ensured.
The supplied canned motor pumps, with tandem design, convey the medium (C3 fraction with propylene as main constituent) at a temperature of 22 °C. The differential head is 379 m at a flow rate of 7.8 m³/h. The pump units are designed for a nominal pressure of 40 bar and have temperature and level monitoring features. For online monitoring of the hydraulic axial bearing, a rotor-position monitoring feature is also provided. The unique arrangement of pumping stages results in minimal shaft deflection and load relief at the slide bearings. The ZART (Zero Axial and Radial Thrust) technology ensures a contact- and wear-free running of the rotor unit.
As canned motor pumps generally contain no failure-prone components such as shaft seals, couplings and friction bearings, this technology is particularly suitable for extremely difficult operating conditions. The leakage-free pump design ensures the safe handling of hazardous and valuable products, while high availability and long service life time are characteristic features associated with it. Moreover, these hermetically-sealed pumps help to enable applicable environmental and work safety requirements to be met.
Previously, Noretyl had only used conventional centrifugal pumps with dynamic shaft seals in use. In light of the challenging service and the desire to increase system availability and minimise maintenance costs, the customer came to a realisation that an alternative pump technology need to be adopted in order to meet the relevant requirements. After a detailed evaluation of the possible solution, Noretyl opted for the canned motor pump. The decisive factors were the high level of safety offered by the sealless (and thus leakage-free) design along with the absence of wear parts and, consequently, longer maintenance intervals.
Hermetic has been supplying canned motor pumps to the petrochemical industry for decades. Such pumps are used both in Greenfield projects and for replacement for problematic pump units in existing plants. Standard models and customised pump solutions can be designed in compliance with the technical oil and gas directive API 685.
Hermetic-Pumpen supplied two 12-stage, sealless, canned motor pumps from the CAM 32/6 + 6 series to Noretyl AS (Ineos) in south-east Norway
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