Triple Eccentric | Keystone

Keystone RMI Dubex Butterfly Valves

Keystone Butterfly Valves, Double Flanged, Triple Eccentric, Keystone Dubex – RMI AWWA Butterfly Valves

Double-flanged, triple eccentric, resilient seated valve designed for services in the water industry.

Features & Benefits:

  • Triple eccentric design:
    • 1st offset: center line of the resilient disc seal is offset from the center line of the shafts
    • 2nd offset: the center line of the shaft is offset from the valve body
    • 3rd offset: the Keystone RMI Dubex body seat landing surface has the shape of an oblique cone with the ground surface perpendicular to one side of the cone
  • Triple eccentric design, along with a resilient disc seal, ensures bi-directional drop-tight shut-off.
  • In-line replaceable resilient disc seal.
  • Fully rated dead end service.
  • Standard body seating surface is ductile iron with Epoxy lining (Epasfill). Alternative seating surfaces such as stainless steel are available on request.
  • Dry shaft option available.
  • Axial bottom shaft bearing carrying the disc weight when installed with shaft in vertical position and ensuring accurate centering of the disc assembly.
  • Reversed V-shaped packing for vacuum applications.
  • Open brackets for packing access and adjustments are available on request.
  • Self-lubricating bearings are PTFE lined. Alternative bushing materials are available on request.
  • Horizontal or vertical shaft mounting.
  • Low head loss, suitable for throttling services.
  • Face-to-face:
    • According AWWA C504-06 short
    • Above 72": manufacturer standard
    • Alternative face-to-face dimensions on request
  • Clockwise closing, optional counter clockwise closing.
  • Suitable for manual gear, electric, hydraulic and pneumatic actuation.
  • Self-adjusting V-shaped shaft packing available.

Reservoirs, circulating water systems
Desalination plants
Cooling water systems (power plants, general industry) 

Technical Data
Sizes: 6" to 160"

Pressure: 6" to 48" – 350 psi
up to 86" – 250 psi
up to 120" – 150 psi
above 120" – contact sales

Temperature: 0 to 220°F

Flange accommodation: as per AWWA C504 flat face (raised face optional)

6" to 72" – ASME B16.1
above 72" – AWWA C207, class D
Other drillings on request

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Technical Data Sheets

Keystone RMI Dubex Butterfly Valves (English)

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Technical Data Sheets

RMI Dubex Butterfly ValveAWWA FTF (Portuguese)

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Technical Data Sheets

RMI Dubex Butterfly ValveAWWA FTF (Spanish)

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