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Self-priming magnetic drive pumps from Michael Smith Engineers

Michael Smith Engineers (MSE) has announced the availability of a series of magnetic drive, self-priming centrifugal pumps for use with corrosive liquids in demanding applications.

The SP series of pumps consists of four models that provide maximum flow rates up to 45 m3/hr and maximum differential to 37 metres.

SP pumps combine deep lift capabilities (dry lift pumping up to 7.6 metres) and fast priming (5.5 metres in 90 seconds) with the important advantages of magnetic drive technology; no seals to replace and zero leakage, says the company.

Carbon bushing supplied with each pump means they can be run-dry for extended periods without damage, meaning no catastrophic pump failure in the event of a process upset.

The SP Series incorporates neodymium batteries allowing them to pump fluids with high specific gravities up to 1.8, such as sulphuric acid, phosphoric acid and sodium and potassium hydroxide.

Pumps are available in a choice of Polypropylene or PVDF, both resistant to corrosion. Maximum operating temperatures are 82°C for the polypropylene version and 104°C for the PVDF version.

MSE says the pumps can be mounted to most standard motors, while NPT or BSP threads, adjustable flanges or union connections make it easy to connect to most process systems.

Typical applications include sump emptying, transferring from underground storage tanks and tanker trucks, pumping in systems that are liable to have trapped or entrained air or in process systems where run-dry protection is needed.