Features ∙ Double flanged design. ∙ The flap is totally encapsulated in NBR rubber for superior sealing and corrosion resistance. ∙ The flap rises above the flowpath reducing wear and allows for a flushing action during operation. ∙ All iron components are coated in fusion bond epoxy resin. ∙ Top entry cover allows for easy access for cleaning and maintenance. ∙ Full flow design for less head loss, less debris accumulation and easy maintenance. ∙ Lower open pressure and excellent seal performance of low pressure. ∙ Simple construction with the flap the only moving part. ∙ 45° seat angle reduces flap travel, minimising slamming and resultant pipe damaging water hammer. ∙ Accessories including limit switches and backflow actuator.