This Appraisal is for a range of S-Gate valves designed to enable under-pressure installation of a gate valve into an existing pipeline without interruption to the water supply. The S-Gate valve range is available in DN 100, DN 150, DN 200, and DN 250 with a pressure classification of PN16 and is suitable for rigid pipes with DIOD compatibility i.e. Ductile Iron, Cast Iron and Asbestos Cement. Valve closing may be clockwise or anticlockwise.
The installation of the product requires specially trained installers. Water Agencies will be offered a complete supply and installation package where only fully trained personnel, licenced by CNS Engineering, will be authorised to install the products.
As there is no applicable standard for this product WSAA has developed a Specification that requires the clamp to comply with the performance requirements of AS4181-2013 Repair and offtake clamps for water industry purposes and the gate valve to comply with the relevant performance requirements of AS/NZS 2638.2 Gate valves for water works purposes Part 2: Resilient seated.