NAF – Setball SF Ball Sector Control ValveEnquire Now
The NAF-Setball SF is a V port ball segment rotary control valve that is highly versatile and designed for high performance modulating control, providing excellent equal percentage flow characteristics for general applications as well as erosive applications such as fibres and slurries. It’s compact size, and short face-to-face dimensions significantly reduce weight making it the cost effective choice.
The Zebra-CL™ live loading stem packing gives you a standard process control valve with a maximum temperature of 250oC that also complies with EN ISO 15848-1 for fugitive emissions. The one-piece, leak proof stainless steel body minimises leak paths, while metal seats with rigid welded overlay of Alloy 6 provides higher leakage resistance over extended periods. It has dual low friction bearings and a specially designed seat, resulting in a smooth operation and making it possible to use a smaller actuator.
The stem is splined so that the connection to the ball has zero backlash for optimum control performance while the direct actuator mounting capabilities of the NAF-Turnex double of single acting control actuator provides a high performance, vibration resistant, compact control valve package. The standard factory fitted NAF-D30 Intelligent Valve Positioner is easy and fast to calibrate with Advanced / Premium diagnostics to ensure you can monitor valve performance.
An optional air block can be fitted to connect the positioner to the actuator so that external piping that can easily be damaged is a thing of the past. Downtime is reduced due to the easy-to-service arrangement which allows for easy replacement of the seat and seat seal without the need for removing the segment and stem and actuator. The metal seat gives a sealing class to IEC 60534-4 Class IV-S1.
V-Port Ball Sector Control Valve
DN 25 – 250 / 1” – 10”
PN 40 / ANSI 150 – 300
|Up to 250°C
Stainless Steel EN1.4408 / CF8M
|Metal Seats Alloy 6 / Stainless Steel
|Stainless steel EN1.4408 / CF8M + Hard Chrome Overlay