For large bore installations we offer the Norval valve in modular form, in sizes 250 mm – 600 mm diameter.
These check valves are constructed by mounting a number of small cone diaphragm assemblies onto a centre
plate which is housed in a mild steel fabricated body. The number and size of the individual Norval cone
is determined by the flow requirements. By using one of our standard mounting plates and fabricated ends,
a permutation to meet all requirements can be achieved. If required, a hand
hole cover can be incorporated in the body.