next Hawle valve generation This revised, cutting-edge valve design will gradually replace the previous E2 valves... New product: House connection drain valve with ZAK® sleeve New nominal diameter N-piece with flanged connections and ZAK® outlets 27 years in use - and hardly aged at all: Our Hawlinger with impressive long-term stability! The new HaPUR® Knife Gate Valve Soft-sealing knife gate valve (order number 392-00) with polyurethane (PUR) coated..... The automatic air release and vacuum valve with unique roll-on membrane.......