hose-diaphragm pumps with check valve design
Double hose-diaphragm pumps with Check Valve design
The check valve design is another technological feature that is essential for gasifier feeding. The pumps are equipped with special double-ball valves. In the short term, should a particle get jammed between the ball and the valve seat result in valve leakage, the second valve ensures effective sealing; this prevents medium backflow and a resulting loss of volume. Big size valves are of top-entry design and provided with hydraulically activated quick change systems, so that complete valve assemblies can be removed within a matter of minutes.
In addition, check valves are subject to permanent condition monitoring by means of acoustic sensors, which are fixed to the outside of the valve casing and not in contact with the slurry. The sensor is capable of detecting leaks, even if the loss of output is still less than 1.5 %. This helps avoid a drop in energy resulting from increased pump speed.
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