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A review of a number of installations, mostly located at considerable depth and/or in situations where access is difficult where it was desirable to reduce the level of pressure surges in high-pressure water-circulation systems and where different solutions were found to improve the individual situations. Specifically these were a) a central cooling plant for air-conditioning at coal faces where the problem was minimized by using control valves having a reduced internal diameter, b) a shaft fresh-water-supply system where surge levels were significantly reduced by modifying the rate and relative time-phasing of the closure of feed- and take-off valves, c) a remotely-located high-pressure water-supply line operating at a pressure range of 270 - 350 bar where welded screw-connections permitted no leakage, d) a water-supply system where pressure variations were substantially reduced by reducing the rate of valve closure in emergency shut-down situations, e) a variable-demand multi-pump supply system where pressure-variation was minimized by modifying the rate and extent of valve closure and f) a supply system powered by piston-type pumps where pressure surges were significantly reduced by modifications of valve operation in the pump.

Additional information

Authors: DMT (DE),
Bibliographic Reference: EUR 17418 DE (1998) 100pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4635-0
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