Inorganic Chemicals, Bulk Chemicals, OEM, Plastics, Offshore, Pulp and Paper, Coatings (pulp and paper), Emissions Reduction, General Processing Industry, Slurries, Bleach Chemical (pulp and paper), Utility, Carbon Pulp Transfer, Water Supply, Cooling Water (metals), General Purpose, Metal and Steel Industry, Oil Production, Polymerization, Slurry Transfer (mining), Erosive Services, Mine Dewatering, Oil Transportation, Polymers, Recycling Services, Boiler Feed (pulp and paper), Mineral Processing, Organic Chemicals, Renewable Fuel Production, Condensate, Digester, Hydrocarbon Processing, Mining, Cellulose Fiber Slurries, Crude Oil Transfer, Paper Stock, Power Generation, Cement Production, Light Slurries, Petrochemical Processing, Lime Circulation, Petroleum Distribution, Chemical Processing, Fibrous Materials, Industrial Gases, Petroleum Production and Refining, Industrial Plant Services, Chemical and Liquor (pulp and paper)

Cooling Water – Metals, Wastewater Collection and Treatment, Dewatering & Water Supply, Water Handling and Treatment, General Industries, Water Resources, Mining, Water Supply and Distribution, Miscellaneous Services, Water Treatment, OEM, Oil and Gas, Polymers, Power Generation, Primary Metals, Pulp and Paper, Slurry Processing, Slurry Transfer, Caustic and Chlor-Alkali, Steam Systems, Chemical Processing, Utilities, Condensate Systems, Waste Processing, Cooling Systems

ISO, ISO 9001:2000, PED, ASME (ANSI)

Pictured: Duball DL mounted with the Automax Supernova actuator (L) and Duball DL mounted with the NAF Turnex pneumatic actuator (R)

The specially designed characteristics of NAF-Duball DL make the valve ideally suited to 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.

The NAF Duball DL has the following features that optimizes performance and reduces plant downtime:

  • a spring loaded stem seal packing that provides long, maintenance-free, safe operation in automated on-off and control service
  • direct actuator mounting capabilities of the Turnex actuator which provides a high performance, vibration resistant, compact valve package
  • a substantial, blowout-proof stem with a long engagement with the ball provides a high torque transmission with minimum mechanical backlash
  • a floating ball that provides bidirectional tightness
  • the unique Z-trim option that minimizes cavitation and noise and has an excellent control characteristic
  • an extensive size range, 1” up to 16”
  • a simple maintenance design, due to the off center joint face of the valve body, which allows for easy replacement of the ball and seals, without the need for removing the stem and actuator
  • metal seats with a rigid welded overlay of Alloy 6 or alternatively metal encapsulated, reinforced PTFE seats
  • a wide range of optional versions