NAF – Torex H.P. Butterfly ValveEnquire Now

NAF-Torex high-performance butterfly valve with pneumatic actuator and positioner, used for isolation, on-off and modulating control.

Torex On/off & Control

NAF-Torex stainless steel butterfly valve with manual gearbox, suitable for precise shut-off and isolation in process industries.

Torex Manual Operation

Exploded view of the NAF-Torex butterfly valve showing internal components and modular design for ease of maintenance and conversion.

Torex Exploded View

BRAND: NAFCATEGORY: Butterfly Valves, Control Valves,

Modular Design. One Valve. Many Applications.

High-Performance Butterfly Valve for Isolation, On-Off & Control

The NAF-Torex high-performance butterfly valve delivers exceptional versatility and durability, making it an ideal solution for isolation, on/off, and modulating control across various industries.

As part of a modular valve package system, it reduces stockholding by serving multiple roles, from manual shut-off to automated control, without the need for additional mounting brackets.

For technicians, engineers and production managers, this means:

Lower inventory costs – One valve serves three functions, reducing stock requirements across mechanical and instrumentation departments.
Faster field conversions – The gearbox can be quickly removed and replaced with an actuator and positioner without additional mounting brackets.
Reliable, long-term operation – The patented disc profile minimizes abrasive sliding, while the high seat angle prevents sticking—resulting in an extended service life, with many valves still in use after 30 years.
Versatile media handling – Suitable for gases, liquids, and steam, with optional customizable stem packing for different process conditions.

For high-performance automation, the NAF-D30 Intelligent Valve Positioner enables fast calibration and real-time diagnostics, improving operational efficiency. An optional air block eliminates external piping, reducing maintenance risks.

Available in wafer or lugged configurations, the NAF-Torex meets stringent industry standards, including IEC 534-4, Class V for metal seats and EN 12266-1, Rate A for soft seats.

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

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

One valve. Three functions. Maximum reliability.

Download the NAF-Torex Technical Bulletin

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Contact us Today – Tel: 0861 103 103

Valve Repair Services

Specifications

Series	Torex
Design	High Performance Butterfly Valve (HPBV)
Features	Triple-offset disc and seat geometry – Ensures non-rubbing travel during opening and closing, reducing seat wear and maintaining tight sealing performance in severe service. Rigid one-piece valve body – Provides excellent dimensional stability, ensuring accurate disc alignment under varying temperature and pressure conditions. Precision-machined laminated metal seat – Offers repeatable shut-off and long service life, even under high cycle frequencies or abrasive service media. Optimised shaft sealing system – PTFE-lined bearings and optional stem packing configurations minimise emissions and maintain low-friction rotation. Wide temperature and pressure envelope – Engineered to handle demanding operating ranges, including high-temperature designs with hard-chrome stems. Interchangeable seat and seal options – Allows configuration of the valve to suit soft-seated or metal-seated Class V service without changing the valve body. Bidirectional flow capability – Suitable for installation where flow direction may vary, simplifying piping design and reducing installation constraints. High disc stiffness – The robust disc design maintains shape under differential pressure, ensuring stable control performance and consistent torque behaviour. Fire-safe variants available – Designs tested to API 607 and ISO 10497 support plant safety requirements in hydrocarbon and high-temperature environments. Industry-standard face-to-face dimensions – Enables straightforward retrofitting into existing piping systems without major modifications.
Size Range	DN 80 – 700 / 3” – 28” > DN 700 refer NAF-Unex
Pressure Rating	PN10 – 40 / ANSI 150 – 300
Temperatures	Up to 350°C
End Connections	Wafer / Lug
Body Materials	Stainless Steel EN 1.4408 / CF8M Other materials on request
Disc Materials	Stainless Steel EN 1.4408 / CF8M
Seat Materials	Inconnel / PTFE
Options & Accessories	Graphite packing for steam up to 350^oC Degreased for oxygen Stem sealing for vacuum O-ring for stem sealing Profibus Valve Positioners HART Valve Positioners
Applications	Isolation, on/off and modulating control for liquids, gases and steam throughout the chemical, pulp and paper and process industries. The excellent characteristics of the NAF-Torex are beneficial in difficult control applications where media, demanding pressure conditions make severe demands on the design, materials and performance of a valve.