NAF Setball SF Segment Ball Control ValveEnquire Now

Setball SF V-Port Control

Setball SF + Rack & Pinion

Setball SF Cut-Away

Setball SF Exploded View

BRAND: NAFCATEGORY: Control Valves

Compact, Precise, and Built for Harsh Process Conditions

Precision Control. Reduced Downtime. Built for Harsh Conditions.

The NAF-Setball SF is a compact, high-performance ball sector control valve engineered for precise modulating service—even in the most demanding process environments. Whether you’re working with fibres, slurries, or standard utility services, this V-port segment ball control valve offers excellent control characteristics and long-term reliability where it matters most: in the field.

Designed with input from process control professionals, the NAF-Setball SF delivers:

Tight, Repeatable Control – The splined stem-to-ball connection ensures zero backlash for accurate response and stable loop performance.
High Rangeability & Equal Percentage Flow – Enables better control across a wide operating window, reducing hunting and improving PID loop stability.
Reduced Maintenance Burden – The robust one-piece stainless steel body and metal seat with welded Alloy 6 overlay provide exceptional resistance to erosion and wear. When service is needed, the seat and seal can be replaced quickly—without removing the actuator or segment.
Space- and Weight-Saving Design – Its short face-to-face wafer construction makes it ideal for compact skid designs and tight retrofits, lowering installed cost and simplifying handling.
Reliable Valve Package – With direct mounting of the NAF Turnex actuator and factory-fitted NAF-D30 intelligent positioner, you get a vibration-resistant, tightly integrated control solution that’s fast to calibrate and easy to diagnose.

The standard Zebra-CL™ live-loaded stem packing is certified to EN ISO 15848-1 for fugitive emissions, supporting environmental compliance while delivering leak-tight performance up to 250°C.

From process optimization to plant reliability, the NAF-Setball SF puts control back in your hands—with fewer maintenance headaches and more uptime.

Our Valve Repair Centres in Secunda and Durban provide expert valve repair, reconditioning, automation, and testing services ensuring that your NAF-Setball SF valves remains in peak condition.

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

Precision control. Maximum uptime. Minimal intervention.

Download the NAF-Setball SF Brochure

Request a Quote by Email

Contact us Today – Tel: 0861 103 103

Valve Repair Services

Specifications

Series	Setball 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	DN 25 – 250 / 1” – 10”
Pressure Rating	PN 40 / ANSI 150 – 300
Temperatures	Up 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	Profibus Valve Positioners HART Valve Positioners Air block to connect actuator and positioner replacing older piping that are easily damaged
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