It’s a wide market, so we examined the latest developments through four sets of highly experienced eyes. First we asked Cryomec in Switzerland to give us the very latest in design innovation. Italy’s Vanzetti Engineering and Linde affiliates, Cryostar were happy to tell us about the pride and pitfalls behind quality manufacturing. Finally we put it all into practice with some application advice from iGas, based in the UK.
Two sides of the story
In very general terms the pumps market is divided between two types of design and usage. Centrifugal pumps are used in the transfer of cryogenic liquid between storage tanks or road tankers, mostly from ASU units. These pumps have the ability to produce a high flow rate and present a low maintenance requirement. Fully truck mounted systems are also used for suitable applications.
The other product group is reciprocating pumps that are used for filling buffer tanks and gas cylinders. These pumps have the ability to function at very high pressure and present a low NPSH requirement (See side box), a quality shared with its centrifugal cousins.
Different by design
Daniel Mayfarth is one of the sales managers with leading pump designer Cryomec, a company he says are, $quot;generally on the technology high-side.$quot; They specialise in supplying products to gas companies, ASUs, and design for a number of specific gases including hydrogen and LNG. He says designing a pump is different every time as, $quot;each is adjusted to the specific working point of the customer, according to their applications.$quot;
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