The NAF Trunnball DL is a full-bore trunnion-mounted ball valve, developed by Flowserve engineers with more than 80 years of experience manufacturing ball valves. The ball is supported by two large, low friction trunnion bearings for consistent low torque even at high differential pressures. Due to its bi-directional tightness, low friction and high controllability, it is an excellent choice for isolation, on/off and modulating control applications.
Additional information
| Valve Size | 6" to 32" |
|---|---|
| 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 | Trunnion Mounted Ball |
| Trim | Full Port |
| Trim Characteristics | Quick-Opening, Positioner Modified Custom |
| Seating | Metal-to-Metal & Soft |
| Shut-Off Classification | ANSI FCI 70-2 Class V; ISO 5208 Rate A |
Features & Benefits
- The NAF Trunnball DL is a full-bore trunnion-mounted ball valve, developed by Flowserve engineers with more than 80 years of experience manufacturing ball valves
- The ball is supported by two large, low friction trunnion bearings for consistent low torque, even at high differential pressures
- Due to its bidirectional tightness, low friction and high controllability, it is an excellent choice for isolation, on/off and modulating control applications
- NAF Trunnball DL is supplied in stainless steel or carbon steel as a standard, but is also available in other materials, such as Duplex, titanium, and others
- The valve has a spring loaded stem seal packing that requires no maintenance and ensures safe operation in automated on/off and control service
- NAF Trunnball DL has direct actuator mounting capabilities of the NAF Turnex actuator which provides a high performance, vibration resistant, compact valve package
- The valve is available with a wide range of options with regards to materials, seat configuration, low noise and anti-cavitation trims and other special versions
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 |
