Pump manufacturer Amarinth announced that it has completed the engineering and delivery work on the new pump systems it developed for Air Products to replace legacy Girdlestone 950 series cryogenic pumps.<\/p>\n
According to the company’s statement, the project covers the replacement of cryogenic pumps that were supplied to Air Products by Girdlestone Pumps around 30 years ago and have reached the end of their service life. Because the existing equipment, designed to operate under low Net Positive Suction Head (NPSH) conditions, is no longer manufactured, direct procurement of replacement pumps had become difficult.<\/p>\n
Amarinth designed the new pumps to be both hydraulically and dimensionally interchangeable with the legacy Girdlestone 950 series systems. This approach aimed to avoid the need for extensive modifications to the existing plant piping and connection points.<\/p>\n
FDA-compliant material change in cryogenic pumps<\/strong><\/p>\n One of the project’s technical requirements was the redesign of the barrier material separating the liquid nitrogen from the gas environment in the motor assembly.<\/p>\n The legacy Girdlestone pump used a carbon-filled PTFE bush for this purpose. However, because Air Products required the new equipment to comply with US Food and Drug Administration (FDA) requirements, this material in contact with liquid nitrogen had to be changed.<\/p>\n Amarinth reported that an alternative material was used that can perform the sealing function at cryogenic temperatures and meets the relevant FDA requirements.<\/p>\n The mounting feet of the motor and pump assembly were also redesigned as part of the project. Instead of the rubber connection elements used in the old system, a new material was chosen that can accommodate the dimensional changes caused by cryogenic temperatures. The design is intended to help maintain axial alignment between the motor and the pump during temperature changes.<\/p>\n Cold start test carried out with liquid nitrogen<\/strong><\/p>\n High-grade stainless steel materials were used so that the new pumps can maintain their mechanical integrity under cryogenic operating conditions.<\/p>\n After manufacture, non-destructive testing (NDT) methods were applied to the pump components. Before commissioning, the system was also subjected to cold start tests using liquid nitrogen to create an environment close to real operating conditions.<\/p>\n Amarinth General Manager Oliver Brigginshaw said the project brought together the company’s technical knowledge of legacy Girdlestone equipment with current engineering and material solutions.<\/p>\n Brigginshaw noted that issues such as thermal contraction, vibration and compatibility with the existing plant infrastructure in cryogenic pumps were addressed within the scope of the project.<\/p>\n","protected":false},"excerpt":{"rendered":" Amarinth has developed new systems compatible with existing infrastructure to replace Air Products’ end-of-life Girdlestone 950 series cryogenic pumps.<\/p>\n","protected":false},"author":55,"featured_media":19734,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wpai_generated_summary":"","footnotes":"","_ms_company":[]},"categories":[7754,7740,7729],"tags":[],"class_list":["post-20388","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fittings-for-liquefied-gases","category-industry-news","category-pumps"],"_links":{"self":[{"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/posts\/20388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/comments?post=20388"}],"version-history":[{"count":0,"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/posts\/20388\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/media\/19734"}],"wp:attachment":[{"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/media?parent=20388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/categories?post=20388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pompa-vana.com\/en\/wp-json\/wp\/v2\/tags?post=20388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}