Vari-V Sizes
NPS ½ FP to NPS 16 SP
½″ FP to 16″ SPVari-V Connections
150# to 4500#, NPT, SW,
BW, Graylock and CustomVari-V Configurations
On/Off, Vari V, Cryogenic, Double Isolation & BleedVari-V Temperatures
-50°C to 260°C
-58°F to 500°FVari-V Delivery
Standard Delivery (16-20 weeks)
Expedited delivery available.Vari-V Quote
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S-Class Valve Downloads
S-Class Valve Catalogues
Overview (7.3MB)Vari-V (3.78MB)S-Class Valve Presentation
Overview (40.4MB)Vari-V (23.6MB)S-Class Valve IOM Manual
IOM Manual (0.9MB)
Vari-V Valve Overview
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 ValveVari-V Balls
At the heart of every S-Class Control Valve lies the Vari-V ball. The profile of the Vari-V ball determines the flow characteristic of the valve, and can be changed to suit the application. 10°, 30°, 60° and 90° Vari-V balls are most common, but other profiles such as a Linear-V, Filler-V and High Turndown-V are also available. Gosco Vari-V Valves are made specifically for your flow conditions - we have a valve to suit your application, with no compromises.
Vari-V BallsCustom V-Balls
Custom Vari-V balls are available for applications that require specific flow requirements which can’t be met using our standard Vari-V balls. With the aid of Computational Fluid Dynamics (CFD), we can create a Vari-V ball with a specific profile to fit any requirement, including high turndown applications. We’ve made custom Vari-V balls with slots that are almost as thin as a human hair.
Custom V-Balls
A Vari-V Valve with a custom “V”, is a bespoke valve that will handle ANY process flow condition.Computational Fluid Dynamics (CFD)
Computational Fluid Dynamics (CFD) is a flow simulation software package that can be used to identify high velocity flow paths within our valve. If these velocities are high enough to cause cavitation or damage to the valve, special design elements can be added to reduce/manage the velocities. CFD was used in conjunction with real flow testing to determine the flow coefficient (Cv) of our standard Vari-V balls. It is also used to design custom Vari-V balls, where unique flow characteristics are required for the service.
CFD SoftwareShaft 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 SealingEncapsulated "Soft" Seats
S-Class encapsulated soft seats are used for high cycle, abrasive, and high pressure/temperature applications. Our proprietary live-loaded design allows us to completely encapsulate the insert on all four sides, leaving only a small section of the "Soft" material exposed for sealing. The insert is held in place with “barbs” that prevent it from extruding out of the carrier. A special fixture compresses the seat assembly to 3 times the max pressure rating of the valve, so that the insert takes a compression set. The seat profile is then machined in to the insert, and it is match lapped to the ball. For abrasive applications, it can be used in conjunction with a boronized, arcuate cut ball.
Encapsulated SeatsExotic 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 AlloysExtended 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 BonnetClearview 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.
ClearviewFast 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
