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  • Vari-V Sizes

    NPS ½ FP to NPS 16 SP
    ½″ FP to 16″ SP
  • Vari-V Connections

    150# to 4500#, NPT, SW,
    BW, Graylock and Custom
  • Vari-V Configurations

    On/Off, Vari V, Cryogenic, Double Isolation & Bleed
  • Vari-V Temperatures

    -50°C to 260°C
    -58°F to 500°F
  • Vari-V Delivery

    Standard Delivery (16-20 weeks)
    Expedited delivery available.
  • Vari-V Quote

    Click here to receive an
    S-Class Vari-V Valve quote.

S-Class Valve Downloads

  • S-Class Vari-V Overview

    Vari-V Control Valves

    When you require precise control of flow, pressure or temperature, the S-Class Vari-V Control Valve provides exactly what you need. Standard 10°, 30°, 60°, 90° V's are cut into the ball to handle the majority of control requirements. Custom profile V's are used for unusual applications requiring special flow characteristics.

    Vari-V Valve
  • V-Balls

    V-Balls

    At the heart of every S-Class control valve lies the Vari-V ball. The profile of the V-ball determines the flow characteristic of the valve, and can be changed to suit the application. 10°, 30°, 60° and 90° V-balls are most common, but other profiles are readily available, including the Linear-V, Filler-V and High Turndown-V. The transition between high flow and fine control with the Vari-V is extremely smooth. Custom options are also available.

    Vari-V Balls
  • Custom V-Balls

    Custom V-Balls

    Custom V balls are available for applications that require specific flow requirements which cannot be met using a standard V-ball. With the aid of Computational Fluid Dynamics (CFD), we can create a V-ball with a specific profile to fit any requirement, including high turndown applications. Some of our custom V balls have slots that are as small as a human hair. Anti-cavitation trim is also available.

    Custom V-Balls
  • CFD/FEA

    CFD/FEA

    Computational Fluid Dynamics (CFD) determines areas of high velocity/flow in a valve, and assist in trim engineering for applications where velocities need to be controlled. It also determines the flow coefficient (Cv) of S-Class Vari-V balls and aids in designing them to custom specifications. Finite Element Analysis (FEA) ensures that our valves meet the required wall thicknesses and strength, and it confirms the structural integrity of the valve.

    CFD/FEA
  • Shaft Sealing System

    Shaft Sealing System

    The core of our patented shaft sealing system is the dual live-loaded packing. To eliminate side loading on the packing, we've added two shaft guides to support the shaft at the bottom and the top. For a third layer of protection, a fugitive emissions port can be drilled to monitor the areas between the packing sets. Our shaft sealing system has been tested by TUV, and exceeds all current and projected fugitive emission standards.

    Shaft Sealing
  • Encapsulated "Soft" Seats

    Encapsulated Seats

    S-Class Valve encapsulated “Soft" seats are used for high cycle, abrasive, high pressure, cryogenic and high temperature applications. Our live-loaded design completely encapsulates the "Soft" insert on all four sides, to minimize its exposure to the process. The “Soft” inserts are held in place by “barbs” on the metal outer carrier, to prevent cold flow. The assembly is then compressed to 3-4 times the maximum pressure rating of the valve, so that the insert takes a compression set. Afterwards, the seat profile is machined and match lapped to the ball. For abrasive/high pressure drop applications, a Devlon insert can be used with a boronized ball.

    Encapsulated
  • Exotic Alloys

    Exotic Alloys

    Cast or bar stock, Gosco manufactures ball valves out of any metal, even metals that require vacuum casting (like titanium). We are not restricted to creating just the body from exotic alloys, as we can manufacture all components to suit your needs, right down to the bolting. Our engineering team at Gosco Valves has extensive experience in corrosive applications, recommending only the best material to use for your specific application.

    Exotic Alloys
  • Extended Bonnet

    Extended Bonnet

    The extended bonnet is perfect for insulated lines as there is at least 2" between the top of the flange and the bottom of the Clearview mounting pad. This allows you to fully insulate the valve and still have access to make packing adjustments, without having to remove the actuator or insulation. The valve shaft flats are also visible, and the actuator is raised away from the elevated process temperatures, preventing damage to the actuator seals.

    Extended Bonnet
  • Clearview Mounting Pad

    Clearview Mounting Pad

    Clearview is a combination of a ISO 5211 mounting pad for easy installation of valve accessories, and a CNC machined/cast bracket that guarantees accurate actuator alignment. Packing adjustments can be performed in-line without removing the actuator, and the double "D" shaft gives you a visible indication of the position of the valve. Clearview also raises the actuator from the valve, and acts as a heat sink to protect it from excessive temperatures.

    Clearview
  • Fast Track Service

    Fast Track Service

    What good is an elite custom ball valve if it can't be delivered when you need it? Fast Track, our expedited delivery service is designed to help you meet near-impossible deadlines. The fee is based on accelerated engineering and design, supplier expedite charges, air freight, extra manpower and other associated costs. What does this buy you? The best custom ball valve and a solid guarantee: if we don't deliver on time, we will waive all Fast Track fees.

    Fast Track