NAF – Setball SF Ball Sector Control ValveEnquire Now

NAF 8211 Setball SF Ball Sector Control ValveNAF 8211 Setball SF Ball Sector Control ValveNAF 8211 Setball SF Ball Sector Control Valve

BRAND: NAFCATEGORY: Control Valves

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.

Contact one of our technical specialists for a quote today or download the brochure to learn more!

Specifications

SeriesSetball SF
Design

V-Port Ball Sector Control Valve

Features
  • Excellent control characteristic in combination with high flow capacity and high rangeability
  • Very compact wafer design for weight reduction and cost savings
  • A one-piece, leak-proof stainless steel valve body to minimise 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, provides smooth operation, making it possible to use a small actuator
  • Stem has a splined transmission to the ball sector for optimum control performance
  • Direct actuator mounting capabilities of the NAF-Turnex actuator provides a high performance, vibration resistant and compact valve package
  • Metal seats with a rigid welded overlay of Alloy 6 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
Size
Range

25mm to 250mm / 1” to 10”

Pressure
Rating

PN40 / ANSI 300

TemperaturesUp to 250°C
End
Connections
Wafer
Body
Materials

Stainless Steel EN1.4408 / CF8M

Seat
Materials
Metal Seats Alloy 6 / Stainless Steel
Ball
Materials
Stainless steel EN1.4408 / CF8M + Hard Chrome Overlay
Options &
Accessories
Applications
  • Process control applications throughout industry
  • Media that contains solids and particles
  • Pulp stock and media containing fibres
  • Where an accurate and wide control range is required
  • High pressure drops

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