NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
NAF – Setball Ball Sector Control Valve
MOC

M = Manual | O = On/Off
C = Modulating Control

NAF

NAF – Setball Ball Sector Control Valve

Applications: Chemical & Synthetic Fuels Mining & Minerals Oil & Gas Power Generation Pulp, Paper & Cellulose

Reliable Control for Fibres, Slurries & General Process Duties The NAF-Setball V-port ball sector valve is engineered for stable, accurate modulating control across general services, fibres, pulps, slurries,...

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About NAF – Setball Ball Sector Control Valve

Reliable Control for Fibres, Slurries & General Process Duties

The NAF-Setball V-port ball sector valve is engineered for stable, accurate modulating control across general services, fibres, pulps, slurries, and demanding chemical duties. With its compact one-piece body, excellent equal-percentage characteristics, and high flow capacity, it offers a robust alternative to linear control valves—providing long-term reliability, lower maintenance effort, and improved process stability for operators responsible for plant uptime.

For technicians, engineers and production managers, this means:

    • Predictable, repeatable control – V-port ball sector delivers equal-percentage flow characteristics for stable loop performance across a wide operating window.
    • Higher throughput & rangeability – Large flow capacity allows the valve to replace linear designs in many applications, reducing project cost and simplifying spares.
    • Lower maintenance burden – Dual low-friction bearings, splined stem connection, and spring-loaded metal or reinforced PTFE seats deliver smooth operation and extended service life.
    • Fast seat and seal replacement – Maintenance teams can service the seat and seal without removing the stem or ball sector, reducing downtime during shutdowns.
    • Improved sealing reliability – V-ring stem packing with optional spring-loading ensures leak-tight operation over a wide temperature range for environmental compliance.
    • Flexible trim options – Low-flow trims for dosing and additives, and Z-trim for cavitation/noise reduction in high-energy applications.
    • Easy automation & compact footprint – Direct mounting of the NAF Turnex actuator eliminates brackets and couplings, improving vibration resistance and lowering installed cost.

Our Valve Repair Centres in Secunda and Durban support full repair, reconditioning, automation, and testing, ensuring your NAF-Setball valves operate at peak performance.

Speak to one of our valve specialists today or download the technical brochure to explore detailed specs.

Stable control. Long service life. Reduced maintenance.

Download the NAF-Setball Technical Bulletin

Request a Quote by Email

Contact us Today – Tel: 0861 103 103

Valve Repair Services

SeriesSetball
Design

V-Port Ball Sector Control Valve

Features
  • Segmented V-port design – Provides an inherent equal-percentage characteristic that delivers smooth flow modulation and maintains stable control across varying differential pressures.
  • Sturdy stem and bearing assembly – Dual low-friction bearings support the shaft and reduce torsional vibration, ensuring accurate positioning under demanding service conditions.
  • Reinforced seat configurations – Available with metal seats, reinforced PTFE seats, or sealed seat designs to match process media and shut-off class requirements.
  • High mechanical rigidity – Robust one-piece body retains dimensional stability under thermal cycling and system vibration, supporting long-term reliability.
  • Balanced torque profile – Engineered torque characteristics minimise actuator load and provide predictable response throughout the valve stroke.
  • Adaptable material selections – Stainless steel, carbon steel, duplex, and other corrosion-resistant alloys allow configuration for fibres, slurries, chemical media, and general utility duties.
  • Low-flow trim options – Specialised trim arrangements available for dosing, additives, and fine control applications where precise low-flow resolution is required.
  • Noise and cavitation control options – Z-trim and other engineered internals help stabilise flow in high-energy environments and protect downstream equipment.
  • Direct actuator integration – Designed for seamless mounting with NAF-Turnex pneumatic actuators and NAF-D30 intelligent positioners, forming a compact and vibration-resistant control package.
  • Service-friendly construction – Access to the seat and seal without removing the stem or ball sector simplifies planned maintenance and enables quicker turnaround during shutdowns.
Size
Range

DN 25 – 700 / 1” – 28”

Pressure
Rating

PN10 – 40 / ANSI 150 – 300

TemperaturesUp to 250°C
End
Connections		Wafer / Flanged
Body
Materials
  • Stainless Steel EN1.4408 / CF8M
  • Carbon Steel
  • Alternative materials available
Seat
Materials		Alloy 6 / PTFE
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 where cavitation occurs
NAF 8211 Turnex Pneumatic Control Actuator

Actuators, Control Valves

NAF

NAF – Turnex Pneumatic Control Actuator

Includes

  • BROCHURES
View Product
NAF 8211 D30 Intelligent Valve Positioner

Valve Positioners

NAF

NAF – D30 Intelligent Valve Positioner

Includes

  • IOM
  • VIDEOS
View Product
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