Hazardous Marine Environment? No Problem!
The design dictated electric motors were not acceptable and therefore air motors were the preferred prime mover for pumps, winches etc. on this installation. The problem we were asked to address lay in providing sufficient lubricated compressed air for each air motor to meet the demands of the design and be capable of reliable operation in the open deck conditions.
The air motor consumption led us to select a 1” filter regulator with Cv of 11.5 for each motor which would provide the air flow needed with sufficient safety margin and a matching lubricator with 500cc bowl capacity.
The Italian manufactured Sitecna® 1”NPT filter regulator has all parts machined from solid 316L stainless steel and capable of withstanding inlet pressures up to 30bar due to the generous wall thicknesses and optimised design. Models from other manufacturers were evaluated by our client but the robust design of the Sitecna® product was judged to be far superior to those based on thin wall castings which they considered could be prone to early failure through corrosion stress cracking.
We offered an additional offshore spec multi-layer paint coating process to both components to further enhance their corrosion resistance, but the client decided that the standard construction would be capable of reliable operation for the expected working life of the system.
Both components carry mechanical ATEX certification for Zones 1, 2, 21 & 22 that enabled our client to complete his documentation package to demonstrate that there would be no risk of explosion from any part of his system.
The system was successfully commissioned and we have since specified similar combinations for them from ˝˝ up to 1.5˝ based on the reliability of this solution.
Tel: +44(0)1443 772 500
Published in Valve User Magazine Issue 38
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