The Hydrotite range of cast and ductile Iron non return valves offer dual plates or single flap options, dependant on application.
The Hydrotite® Single Flap Check Valve is available in sizes DN50mm-DN600mm
The Hydrotite® Dual Plate Check Valve is constructed to ANS1150, seating class A, and available in sizes DN40mm-DN1200mm.
Gillies Ductile Iron Reflux Valve is available in sizes DN80mm-DN600mm