The Duball DL is a high-performance, metal-seated, full-bore ball valve, equally suitable for isolation, on-off and modulating control applications. The excellent characteristics of NAF Duball DL are particularly beneficial under the most challenging operating conditions in the process industry, where difficult media and demanding pressure conditions make severe demands on the design, materials and performance.
Additional information
| Valve Size | 1" to 16" |
|---|---|
| Pressure Class Standard | ASME B16.34 |
| Pressure Class Range | Class 150, 300 |
| Body | Two-Piece Body |
| End Connections | Integral Flange |
| Face-to-Face Standard | ANSI B16.10 Short (Class 300) & Long Pattern (Class 150, 300) |
| Bonnet | Body Integral |
| Packing | R-PTFE Carbon Reinforced, Live-Loaded |
| Configuration | Floating Ball |
| Trim | Full Port |
| Trim Characteristics | Quick-Opening, Positioner Modified Custom |
| Seating | Metal-to-Metal & Soft |
| Shut-Off Classification | ANSI FCI 70-2 Class IV, V, VI; ISO 5208 Rate A |
Features & Benefits
- The unique spring loaded stem seal packing guarantees a long maintenance-free and safe operation
- Long, maintenance-free, safe operation in automated on-off and control service assured by spring-loaded stem seal packing
- Increased plant and personnel safety via blowout-proof stem and high-torque transmission with minimum mechanical backlash
- Broad application versatility enabled by extensive size range and options, including fire-safe tested versions
- High performance enabled by direct actuator mounting capabilities of the Turnex actuator
- Excellent control, noise reduction and cavitation enabled by unique Z-trim option
- Easy installation and replacement as a result of the off-center joint face of the valve body
Standards & Certifications
| Certifications | Canadian Registration Number (CRN) |
|---|---|
| Safety Integrity Level (SIL) 3 Capable | |
| PED Directive 97/23/EC | |
| Fire-Safe to API 607, ISO 10497 | |
| Design Standards | ASME B16.5 – Pipe Flanges & Flanged Fittings |
| ASME B16.10 – Face to Face & End Dimenions of Valves | |
| ASME B16.34 – Valve Flanged, Threaded, and Welding End | |
| ASME SA Materials | |
| ASTM A Materials | |
| Quality | IS0 9001:2008 |
| ATEX QAN | |
| IECEX QAR |
