Keystone RMI Dubex Butterfly Valves0 pages

Keystone RMI Dubex Butterfly Valve
AWWA Face-to-face
The Dubex is a double flanged, triple eccentric resilient seated valve design
for services in the water industry

Features

General application

Technical data

• Drinking water pump station and

transportation/distribution.
• Waste water effluent and treatment plants.
• Reservoirs, circulating water systems.
• Desalination plants.
• Cooling water systems (power plants, general

industry).

Pressuret
:t6” to 66”t
350 psi
tt up to 84”t
250 psi
tt up to 120”t
150 psi
tt above 120”t contact factory
Temperaturet :t0 - 220°F
Flange
accommodationt :tas per AWWA C504
tt flat face (raised face optional)
Drillingt
:t6” to 72”tASME B16.1
tt above 72” AWWA C207,
tt class D
tt Other drillings on request

Certification
Standard NSF 61.

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•tTriple eccentric design:
t - 1st offset: center line of the resilient disc
seal is offset from the center line of the
shafts.
t - 2nd offset: the center line of the shaft is
offset from the valve body.
t - 3rd offset: the Dubex body seat landing
surface has the shape of an oblique cone
with the ground surface perpendicular to
one side of the cone.
•tResilient seal firmly integrated on disc for
tight shut off performance.
•tIn-line replaceable and readjustable resilient
disc seal.
•tStandard body seating surface is Stainless
Steel. Alternative seating surfaces on request.
•tHorizontal or vertical shaft mounting.
•tAxial bottom shaft bearing carrying the disc
weight when installed with shaft in vertical
position.
•tReversed V-shaped packing for vacuum
applications.
•tOpen brackets for packing access and
adjustments are available on request.
•tSelf lubricating bearings.
•tLow head loss, suitable for throttling services.
•tFace-to-face:
tAccording AWWA C504-10 short.
tAbove 72”: according AWWA C516-10.
tAlternative face-to-face dimensions on
request.
•tClockwise closing.
•tSuitable for manual gear, electric, hydraulic
and pneumatic actuation.
•tAWWA POD (Proof Of Design) certificates
available.
•tDesign to comply with AWWA:
t - Higher grade shaft material comply to
shaft safety requirements of AWWA.
t - Minimum shaft diameter deviates from
AWWA.
•tPerformance testing in compliance with
AWWA C504 requirements.
•tValves are cycle tested as per AWWA C504
requirements.

RMISB-0018-US-1311