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Onyx Valve Series DHC
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Onyx Valve Series DHC


The Series DHC is a full round port dual pinch mechanism valve designed for clog-resistant performance and drop-tight closure in on/off or throttling service applications. Featuring stainless steel internal parts, the Series DHC can be automated and is available with limit switches for enhanced control and monitoring.

The valve's full round opening minimizes pressure drop and ensures efficient flow, while the dual pinch mechanism provides effective sealing and self-cleaning capabilities. The ACME threaded stainless steel stem enables easy operation, and the rugged construction with cast iron or ductile iron housing ensures durability in demanding industrial environments.


  • Clog-resistant full round opening for minimal pressure drop
  • Dual pinch mechanism for drop-tight closure and self-cleaning
  • Stainless steel internal parts for corrosion resistance
  • Can be automated for remote operation
  • Available with limit switches for position indication
  • ACME threaded stainless steel stem for easy manual operation
  • Rugged cast iron or ductile iron housing for durability
  • No packing required, eliminating leakage and maintenance
  • Suitable for on/off or throttling service


  • Slurries and abrasive media
  • Pulp and paper processing
  • Wastewater treatment
  • Mining and mineral processing
  • Chemical processing
  • Food and beverage production
  • Dry bulk material handling


  • Valve sizes: 2" to 24" (larger sizes available upon request)
  • Flange standards: ANSI 125/150 lbs (300 lbs optional)
  • Housing materials: Cast iron (ASTM A48, Class 35) for sizes up to 10", Ductile iron (ASTM A536-80, Class 65-45-12) for sizes 12" and up
  • Sleeve elastomer options for various media compatibility
  • Temperature range: Depends on sleeve elastomer, consult manufacturer
  • Operating pressure: Up to 150 psi (higher pressures available with special construction)



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