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  • S-Class Sizes

    NPS ½ FP to NPS 16 SP
    ½″ FP to 16″ SP
  • S-Class Connections

    150# to 4500#, NPT, SW,
    BW, Graylock and Custom
  • S-Class Configurations

    On/Off, Vari-V, Cryogenic, 3-Way Diverter, Double Isolation & Bleed
  • S-Class Temperatures

    -270°C to 260°C
    -454°F to 500°F
  • S-Class Delivery

    Standard Delivery (16-20 weeks)
    Expedited delivery available.
  • S-Class Quote

    Click here to receive an
    S-Class Valve quote.

S-Class Valve Downloads

  • S-Class Valve Overview

    S-Class Ball Valves

    S-Class is Gosco's soft-seated, high-performance ball valve line. Features include: A full range of trim options for abrasive, high cycle, chemical and high temperature applications, an extended bonnet for insulation, a patented shaft sealing system that surpasses all existing and proposed fugitive emission standards, a Clearview mounting pad for simple actuator installation, and a full range of exotic alloy and seat options for abrasive, high cycle, chemical and high temperature applications.

    S-Class Valves
  • 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 perfect for high pressure/temperature applications because they don’t distort. 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. Then, the seat profile is machined and match lapped to the ball. Our encapsulated seats increase the temperature rating by approximately 50°C and allow us to go to Class 4500 with “Soft Seats".

    Encapsulated Seats
  • Arcuate Cut Ball

    Arcuate Cut Ball

    An arcuate cut is a profile in the ball that reduces velocity as the valve opens and closes. When a standard ball valve is in the first and last 10° of opening/closing, velocities are very high (especially in the corners), and erosion occurs. With an arcuate cut, the opening on the ball is almost three times as large. This reduces the velocity by spreading out the flow through a larger opening, which reduces wear on the ball and seats. BORONIZING must be used to harden arcuate cut profiles because HVOF coatings are line of sight and can not evenly coat the ball.

    Arcuate Cut Ball
  • Exotic Alloys

    Exotic Alloys

    Cast, forged or bar stock, Gosco manufactures ball valves out of any metal - even specialty metals that require vacuum casting (like titanium). We are not restricted to making just the body from exotic alloys - we can manufacture any component to suit your needs, right down to the bolting. Our engineering team at Gosco Valves has extensive experience in corrosive applications, and can recommend the appropriate material to use for specific media.

    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

    The Clearview mounting pad is a combination of an 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 away from the valve, and acts as a heat sink to protect it from high temperatures.

    Clearview
  • Fast Track

    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 calculated 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 do not deliver on time, we will waive all Fast Track fees.

    Fast Track