Flowzone Engineering Solution

Neles™ trunnion ball valve, series D

Neles series D trunnion mounted ball valves utilize decades of experience in metal-to-metal seat technology. The valves are paired with the Neles B1 series actuator and VG9000 intelligent safety solenoid, ensuring high availability in demanding safety valve applications. The valves can also be equipped with Neles Q-trim™ ball valve noise attenuation trim options for control applications.


  • Sustained tightness over a long period
  • Can operate reliably in demanding conditions such as fluids containing solids and abrasives
  • Gas noise attenuation can be significantly improved by utilizing the Neles Q2-trim as an option
  • Low emissions compliant with ISO 15848 standard across a wide temperature range, from cryogenic to high temperatures


  • Robust, heavy duty trunnion bearings
  • Unique Stemball® construction with anti-blowout stem and no backlash on stem to ball connection
  • 2-piece split body
  • Application-based seat selection options including metal-to-metal and soft seats
  • Neles Q-trim™ technology for control applications, anti-cavitation, and noise attenuation
  • Latest Neles Q2-trim™ option available for gas applications
  • Low emissions according to ISO 15848, from cryogenic to high temperatures
  • Fire safe certified according to API 607
  • SIL3 certified
  • High Cv, including noise attenuation trims, which are designed to be self-flushing
  • Easy to maintain construction


  • ESD / ESV service (SIL 3)
  • De-pressurizing and blow down service
  • Low noise and anti-cavitation
  • Cryogenic service
  • High temperature service
  • High cycle and switching service
  • Molecular sieves
  • Solids handling
  • Chemical and petrochemical plants
  • Oil and gas production
  • Steam
  • Natural gas, LNG, LPG
  • Power plant


Flanged, trunnion mounted, full & reduced bore ball valve
Size range
D1F: DN50 – 700 (2” – 28”)D2: DN700 – 900 (28” – 36”)
Face to face
ASME B 16.10
Pressure ratings
EN PN 10-100, ASME 150-600
Temperature range
-200 °C … +600 °C / -330 °F … +1110 °F


  • Technical bulletin
  • Installation, maintenance and operation manual
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