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  • Block & Bleed Sizes

    NPS ½ FP to NPS 16 SP
    ½″ FP to 16″ SP
  • Block & Bleed Connections

    150# to 4500#, NPT, SW,
    BW, Graylock and Custom
  • Block & Bleed Applications

    Customizable with a bubble tight seal, exotic alloys, & custom ends
  • Block & Bleed Temperatures

    -50°C to 260°C
    -58°F to 500°F
  • Block & Bleed Delivery

    Standard Delivery (16-20 weeks)
    Expedited delivery available.
  • Block & Bleed Quote

    Click here to receive a
    Block & Bleed Valve quote.

S-Class Valve Downloads

  • Block & Bleed Valve Overview

    S-Class Block & Bleed Valves

    The Gosco Block and Bleed valve combines all the unique features in a standard S-Class valve with encapsulated seats that are not only live loaded, but also truly bi-directional. This makes the Gosco a true Double Isolation and Bleed valve. With the best shaft sealing system in the world, any exotic alloy option and high pressure capabilities (up to Class 4500), these valves are versatile enough to tackle the toughest applications.

    Block & Bleed
  • Configurations


    The Gosco Block & Bleed valve is essentially two bi-directional valves with a bleed valve between them. Whether we provide two valves with a spacer/bleed valve between them, or an integral body with two internal valves and a bleed valve, we meet all definitions of API 6D for double block & bleed (DBB), double isolation & bleed (DIB), and OSHA double block & bleed (DBB).

  • Shaft Sealing

    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
  • Bi-Directional Sealing

    Bi-Directional Sealing

    To meet all definitions of block & bleed valves (BB, DBB, DIB and OSHA DBB), the block valves MUST have bi-directional sealing at full design pressures, and at a 1psi differential. S-Class block & bleed valves use live-loaded encapsulated seats to accomplish this. That means we can offer you any type of block & bleed valve. The difficulty is finding out what type you really need.

  • 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
  • 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.

  • 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