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Onyx Valve Series DAC
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Onyx Valve Series DAC


The Series DAC is a full round port, mechanically pinched dual pinch valve designed for heavy-duty applications. Its clog-resistant full round opening ensures low pressure drop and eliminates the need for packing, providing drop-tight closure for both on/off and throttling services. Available with fail-open or fail-closed pneumatic actuators, the Series DAC is an ideal choice for demanding industrial environments.

Constructed with durable materials such as cast iron or ductile iron housing, 303 stainless steel stem and guide rods, and ductile iron pinch bars, the Series DAC offers reliable performance and long service life. The valve's robust design and customizable options make it suitable for a wide range of applications across various industries.


  • Clog-resistant full round opening for low pressure drop
  • No packing is required, ensuring drop-tight closure
  • Suitable for on/off or throttling service
  • Available with fail-open or fail-closed pneumatic actuators
  • Heavy-duty design for demanding applications
  • Customizable options, including sleeve elastomer, epoxy paint, and secondary containment package


  • Handling abrasive, corrosive, or viscous media
  • Slurry and bulk material handling
  • Pulp and paper industry
  • Chemical processing
  • Mining and mineral processing
  • Wastewater treatment
  • Food and beverage processing


  • Valve sizes: 2"-30" 
  • Flange options: ANSI STD 125/150 lbs, ANSI STD 300 lbs
  • Housing materials: Cast iron (ASTM A48, class 35) for valve sizes up to 10", Ductile iron (ASTM 65-45-12) for valve sizes 12" and up
  • Stem & guide rods: 303 stainless steel
  • Pinch bars: Ductile iron (ASTM 65-45-12)



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