Weir has supplied engineered valves to nuclear power plants worldwide since the 1950s. Our brands include: Atwood & Morrill™ MSIV and Check Valves, Batley Valve® High Performance Butterfly Valves, Blakeborough® Control Valves, Hopkinsons® Isolation Valves, Sarasin-RSBD™ Safety Relief Valves, Sebim™ Pilot Operated Safety Valves and TRICENTRIC® Triple Offset Butterfly Valves.