Serie R, RB, & RS

Body material: SA216WCC, SA217WC6, SA351CF8M
Medium: Gases, Vapours and Liquids

Features and Benefits
  • Single trim for all services provides full capacity at 10% overpressure for liquid, steam, or vapor applications.
  • Reversible disc provides a spare part in every valve.
  • Nozzle threads at top ensure better nozzle/body alignment and reduce maintenance effort.
  • Disc retention by ring eliminates potential of thread corrosion and need for special maintenance tools.
  • Standard Inconel® 625 Bellows offers better corrosion resistance than 316L SS at no extra cost.
  • Springs within a pressure class and orifice size are designed with a fixed I.D. to eliminate the need to custom-machine steps for each spring.
  • Identical nozzle ring for each orifice size, regardless of pressure range or seat design, to reduce parts variation.
  • In the soft seat option, the spring load is applied directly to the metal seat, increasing service life of the O-ring. The soft seat disc retains the metal seat on its reversible side.

General Specifications
  • ASME VIII UV Certified
  • API 526 Compliant
  • 1-inch D 2-inch through 8-inch T 10-inch [25mm D 50mm though 200mm T 250mm]
  • Optional soft seats
  • CS, Alloy Steel, and 316 SS are standard materials
  • Lift levers, test gags, steam jackets, and other accessories available
  • Monel®, Hastelloy® C, and Duplex SS materials for corrosive applications
  • NACE MR-0175 compliant trim available
  • Cryogenic materials available
  • Oxygen cleaning (LOX, GOX) available
  • Canadian Registration Numbers (CRN) avaliable.

Technical Data
  • R Series
    Conventional design
  • RO Series
    Conventional design, soft seat
  • RB Series
    Balanced bellows design
  • RBO Series
    Balanced bellows design, soft seat
  • RS Series
    Open bonnet for steam service
  • JR Series
    Conventional design, steam jacketed
  • JRB Series
    Balanced bellows design, steam jacketed