The NAF Torex, High-Performance butterfly valve is available with either metal-to-metal or soft seats. Due to its unique design and triple offset, it closes extremely tight. It can be used both as a control valve and as a shut-off valve.This valve can be supplied in either wafer or lugged versions. The valves are also available in other materials e.g. Carbon steel, and Titanium, other stainless steel materials and in Fire-safe design.
Additional information
| Valve Size | 3" to 28" |
|---|---|
| Pressure Class Standard | ASME B16.34 |
| Pressure Class Range | Class 150, 300 |
| Body | Wafer |
| End Connections | Lugged, Integral Flange, Flangeless |
| Face-to-Face Standard | API 609 |
| Bonnet | Body Integral |
| Packing | Standard O-Ring, Stuffing Box, Fugitive Emissions, Live-Loaded, Fire-Safe |
| Configuration | Triple-Offset |
| Trim | Contoured Eccentric-Cammed Disc |
| Trim Characteristics | Linear |
| Seating | Metal-to-Metal & Soft |
| Shut-Off Classification | ANSI FCI 70-2 Class V (Metal-Seated), ISO 5208 Rate A (Soft-Seated) |
Features & Benefits
- Triple offset design enables the valve closure to be extremely tight
- Small offset results in low operating torque in all control positions, so that low-torque actuators can be used
- Special disc profile (segment of a toroid) – a principle which eliminates abrasive sliding action when the disc is opening and closing
- High mean value of seating angle, so that the disc closes without tending to stick in the closed position, virtually eliminates any disk popping
- NAF standard for mounting the actuator, which simplifies installation and results in a compact valve/actuator unit
Standards & Certifications
| Certifications | Canadian Registration Number (CRN) |
|---|---|
| PED Directive 97/23/EC | |
| Design Standards | API 609 – Butterfly Valves: Double-Flanged, Lug and Wafer |
| ASME B16.5 – Pipe Flanges & Flanged Fittings | |
| ASME B16.34 – Valve Flanged, Threaded, and Welding End | |
| ASME SA Materials | |
| ASTM A Materials | |
| Quality | IS0 9001:2008 |
| ATEX QAN | |
| IECEX QAR |
