Wanner to highlight latest seal-less pump technology at Achema
24 May 2012
Wanner International, inventor of the 'Hydra-Cell' diaphragm pump technology, will be showing an extension of this innovative technology in a new range of seal-less, high-pressure diaphragm pumps on its stand at Achema 2012 in Frankfurt next month. The new T-Series extends the Hydra-Cell pump concept into higher flow capacities and pressure ranges, where it will compete directly with conventional triplex piston plunger pumps in applications up to 170 litre/min and 310bar.
The first model to be developed, the T8045, is also the world’s first seal-less triplex pump. Able to deliver liquid flows up to 170 litre/min at 207bar, it provides the advantages of compact size and high reliability, the latter thanks to its total non-reliance on dynamic seals. The pump comprises three diaphragms manifolded together in a single pump head with associated check valves that can be manufactured in a range of materials compatible with the pumped fluid. The seal-less design allows leak- and emissions-free operation, and dry-running.
The T8045 delivers true positive displacement. Pressure changes have minimal effect on flow, which facilitates simple VFD flow control, accurate metering and dosing and flexible performance in applications such as pressure injection.
Hydra-Cell’s T Series was originally conceived to handle severe pumping applications in the oil and gas industries. Accordingly, field trials have been conducted chiefly in oilfields, where conditions can be particularly demanding. Required levels of performance, the mix and types of liquids pumped, the working environment and the location (often remote from service facilities) together present a formidable challenge.
In an initial application of the T8045, Wanner is working in collaboration with jet pump manufacturer JJ Tech. The Hydra-Cell pump is at the heart of a volume jet lift process in which it delivers ‘power fluid’ at pressure from the surface to a down-hole lift pump where it is mixed with ‘produced fluid’ (typically a mix of water, particulate debris, oil and gas) and driven to the surface. There the combined fluids are separated and the produced water reinjected back underground, completing the cycle.
A particularly striking aspect of the T8045 is its ease of maintenance - a common feature throughout the Hydra-Cell range. Valves can be replaced without disturbing the plumbing, and using special stud extenders that allow the manifold to slide effortlessly back and remain supported, the diaphragms can be replaced while the pump remains in-situ. The seal-less design generally means less frequent need for maintenance; indeed, on one particular oilfield beta site, a 14 month maintenance interval was achieved.
Even if the suction is closed or blocked, T Series pumps can continue to run dry indefinitely – allowing ample time to correct problems in the inlet line with no risk of damaging the pump. The seal-less design also eliminates leaks and VOC emissions, along with the expenses associated with seal repair and replacement. Moreover, the hydraulically balanced diaphragm arrangement provides pulsation-free operation, so no pusation dampers are requred, as is the case with single diaphragm type pumps
T Series pumps, in common with other models in the range, are simple in design, compact and energy efficient. And with drive components submersed in lubricant, frictional energy losses through the pump are minimal. Total pumping efficiencies above 90% are normal and, equally important, sustainable.
Click here for a video animation of the T8045 in action.
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