Trunnball DL

Trunnball DL

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.

Brand: NAF
Category: Standard Full Ball
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

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

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 Dimensions 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