| 摘要 |
<p>Apparatus for treating with ultra-violet rays water from ponds and aquaria comprises a water treatment duct with water inlet and outlet means at opposite ends and an ultra-violet light-emitting tube extending lengthwise. Flow control means is provided to promote non-laminar water flow during treatment. The flow control means comprises the duct itself which is of non-circular cross-sectional shape, whereby a degree of turbulent flow is caused. The duct is provided by a length of plastics ducting originally manufactured for use as part of a rainwater disposal system of a building. Moulded plastics end caps close the ends of the duct and O-rings seal it to the light-emitting tube. Flanged plastics water connector ducts at each end are bonded in position in openings in the flat faces of the water treatment duct.</p> |
