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The dc system has also been demonstrated on two swing check valves that were installed in two active flow systems at an operating nuclear power plant.
Also featured in the brochure are two-way and three-way soft-seated valves, swing check valves, control valves, single top drain valves, low-flow control valves and dual adjustable orifice drain valves.
Spring-loaded and weighted lever swing check valves are available from APCo/Valve & Primer Corp.; American Flow Control, Div.