| 摘要 |
<p>Nozzles for arms of rotary distributors or other distributor ducts for filter beds or other effluent purification apparatus are formed from elastomeric material as a one piece moulding comprising a body defining a through jet passage (11) typically convergent in the downstream direction and two external radially projecting flanges (14, 15) defining a groove to receive the edge of the duct opening in which the nozzle is mounted, the flexible or resilient material enabling ready insertion or removal of the nozzle and effective sealing of the edge of the duct opening. <IMAGE></p> |
