MFIV main feed water isolation valves for nuclear reactors

Features & Benefits

• Gate valve with cast or forged body
• Parallel slide disc (MFIV) or flexible wedge type (MFLLIV).
• Bolted bonnet type for higher reliability and easier maintenance.
• Low stem head in a wedge cavity reduces the height and weight of the valve. Design pioneered by Velan.
• Seating faces are hardfaced with CoCr alloy.
• Reinforcedbody/bonnet/yoke superstructure for superior seismic resistance.
• Hardfaced back seat protects the stem packing in the fully open position.
• Sizing to meet electric actuators switch-off failure and prevent the valve integrity in case of failure of actuators torque switches.
• Packing and gaskets in certified “PMUC” Nuclear grade materials with low halogen and chloride contents for superior corrosion resistance.
• Electrical actuators.