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A large industrial valve with a silver body and a blue control mechanism on top, designed for regulating fluid flow in pipelines. The valve features a handwheel for manual operation and displays a robust construction.

MFIV main feed water isolation valves for nuclear reactors

Product Line
  • Velan SAS nuclear valves
Product Type
  • Gate

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.

Product Details

Spec Detail
Size Range NPS 10 – 18 (DN 250 – 400)
Pressure Class Class 900
Standard Connections Contact Velan
Body Material contact Velan

Quality That Lasts

Precision Engineered

Our products, crafted with cutting-edge precision, set the industry standard for quality, reliability, and versatility across an expansive range of applications.

Long-Lasting & Durable

Velan leverages advanced engineering capabilities and innovation to create durable valves that meet critical industrial needs in the areas of nuclear power, mining, oil and gas, and more.

Certified & Tested

Innovation is our DNA. From our first steam trap to advanced cutting-edge valve designs, we are committed to providing solutions that define the highest standards of quality and performance.

Contact Us

Reach Out

Need support or have a question? The Velan team is here to help.

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