Setball SF Ball Sector Valves

The NAF Setball SF is a highly versatile and cost-effective solution to a range of general services as well as
erosive applications such as fibers and slurries.
A V-port ball sector valve designed primarily for modulating control applications, the Setball SF can also be used effectively for
shut-off service. It combines a compact design with excellent equal percentage flow characteristics and high flow capacity.
The NAF Setball SF offers the following features to provide durable functionality and greater reliability for increasing process
yield and plant uptime:
• A ball sector with a V-port resulting in excellent control characteristic in combination with high flow
capacity and high rangeability
• A very compact wafer design for weight reduction and cost savings
• A one-piece, leak-proof stainless steel valve body to minimize leakage paths
• Enhanced product integrity through a spring loaded stem seal packing that provides a long, maintenance free and safe operation
• Dual low friction bearings and a specially designed seat, resulting in a smooth operation and making it
possible to use a small actuator
• A stem with a splined transmission to the ball sector for an optimum control performance
• Direct actuator mounting capabilities of the NAF Turnex actuator which provides a high performance,
vibration resistant, compact valve package
• Metal seats with a rigid welded overlay of Alloy 6 to provide a higher leakage resistance over extended periods
• Special low flow trims for the smallest size
• Reduced downtime through an 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
CE-marked according to Pressure Equipment Directive (PED 97/23/EG) module H, category III. For module H1,
category IV contact NAF

Technical specifications for standard design

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