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Image of a Velan industrial valve featuring a metallic body with a blue actuator. The valve is vertically oriented and designed for controlling fluid flow in pipelines. It has a sleek, cylindrical shape and includes the Velan logo on the actuator.

MSIV Main Steam Isolation Valve for Nuclear Reactors

Product Line
  • Velan SAS nuclear valves
Product Type
  • Gate

Features & Benefits

  • Gate valve with cast body.
  • Pressure sealed type.
  • The double disc design minimizes the risk of wearing.
  • Seating faces are hardfaced with CoCr alloy.
  • Reinforced body/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.
  • Oleo-pneumatic actuator providing full closure in less than 3 to 5 s.

Product Details

SpecDetail
Size RangeNPS 18 – 30 (DN 450 – 570)
Pressure ClassClass 900
Standard ConnectionsContact Velan
Body MaterialContact 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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