Rotary VBall Control Valves are available from S&K Automation. Both Industrial and Commercial / HVAC Versions of this Valve are available to fit your application. We can help with Control Valve Sizing for Liquids, Gases and Steam.
Rotary VBall Control Valves are an Excellent Replacement for Butterfly Valves used for Control. Rotary VBall Control Valves have wider controllable range 300:1 vs 10:1 for Most Butterfly Valves. *see note below about valve turndown. A valve sized for 60 - 80% open at maximum flow and not less than 20% minimum flow will give the best control.
* vball control valves typically have a turndown of 100:1. If a manufacturer states turndown as a very high ratio like 500:1 per size, it means from the lowest cv of the smallest oriface size with the valve almost closed to the largest cv of the largest oriface size with the valve fully open.
Features- Size Range 1-1/2” - 30”
- ISO 5211 Direct Mount Design
- ANSI Class 150, 300, 600, 900
- Flanged and flangeless versions available
- Live Loaded Packing
- Protected Bearings, Top & Bottom
- Easy Installation and Versatility
- Standard ISA 75.04 face-to-face; Option: ANSI B16.10 short pattern
- Extremely low actuator torque
- Reduced trim option
- WCB, 316SS, 317SS, and other alloy materials
- Soft seated and metal seated
- Patents Pending