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Onyx Valve Series CHR
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Onyx Valve Series CHR


The Onyx Series CHR is a full round port single pinch valve designed for efficient, reliable operation in demanding industrial applications. Featuring a clog-resistant full round opening, this valve offers low pressure drop and drop-tight closure. The Series CHR incorporates high-quality stainless steel internal components, including an ACME stem for easy operation, and can be automated with optional limit switches.

Constructed with a rugged cast iron housing, the Series CHR provides simple, durable performance across a range of industries. The pinch mechanism design eliminates the need for packing, reducing maintenance requirements and ensuring long-lasting, leak-free service. With its versatile configuration options and robust construction, the Onyx Series CHR is an ideal choice for controlling flow in challenging environments.


  • Full round port design for clog-resistant operation and low pressure drop
  • Single pinch mechanism with stainless steel internal parts for durability and reliability
  • Can be automated with optional limit switches for remote operation and monitoring
  • Drop-tight closure ensures leak-free performance
  • High-efficiency stainless steel ACME stem for easy manual operation
  • Simple, rugged cast iron construction for long service life in demanding applications
  • No packing is required, reducing maintenance needs


  • Chemical processing and manufacturing
  • Pulp and paper mills
  • Food and beverage production
  • Mining and mineral processing
  • Wastewater treatment plants
  • Dry material conveying systems
  • Air pollution control equipment


  • Available in ANSI Standard 125/150 lbs and 300 lbs flange configurations
  • Housing materials: Cast Iron (ASTM A48, Class 35) or Ductile Iron
  • Stem and pinch bar: 303 or 316 Stainless Steel
  • Bearing: Bronze Alloy
  • Optional sleeve elastomers and epoxy paint finishes are available
  • Sizes range from 1" to 12" to accommodate various flow requirements



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