SISCORBV030 Series Butterfly Valve

Company & Products
B utterfly Valve
■ RBV030 Series Butterfly Valve
RBV030 Series is a line of U-TYPE concentric
resilient seated heavy duty large diameter butterfly
valve, designed to meet the stringent requirements
of industrial applications and to provide reliable
performances under various working conditions.
The RBV030 Series Butterfly Valve is available from

size DN450 (18") to DN1800 (70").
R BV030 Series
■ Field of Application
Water & Wastewater Treatment

Desalination Plants
Irrigation
District Cooling System
HVAC
Power stations / FGD
Petroleum Refining & Oilfield
Shipbuilding
Marine
Steel Production
Aluminum Production
Mining Applications
Chemical Applications
Ultrapure Water
Pharmaceutical
Food Processing
Beverage
Brewing/Wine Making
Sugar/Ethanol
Pulp & Paper
1
Working & Environment
■ Temperature Range
Depending on different material used for the valve seat, RBV Series
butterfly valve is applicable to a wide range of working temperature.
Material Working Temperature
EPDM -20 ℉ (-29℃ )~250 ℉ (121℃ )
BUNA-N 0 ℉ (-18℃ )~212 ℉ (100℃ )
Viton 0 ℉ (-18℃ )~400 ℉ (204℃ )
Polyurethane -20 ℉ (-29℃ )~176 ℉ (80℃ )
PTFE-Lined EPDM (Standard) -20 ℉ (-29℃ )~250 ℉ (121℃ )
PTFE-Lined EPDM (High-Temp) -20 ℉ (-29℃ )~302 ℉ (150℃ )
Virgin PTFE & Conductive PTFE 0 ℉ (-18℃ )~392 ℉ (200℃ )
UHMWPE 0 ℉ (-18℃ )~185 ℉ (85℃ )
■ Medium
Different Disc / Seat material combinations in RBV030 Series are
available to choose according to different medium and working
conditions. Experienced senior SISCO engineers are here to serve
you providing professional advices to suit your particular needs.
■ Bill of Material
Part Name Material
Cast Iron
Body
Ductile Iron
Body Coating Epoxy Coating
ASTM 304/316 Stainless Steel
Disc Super Duplex Stainless Steel
Aluminum Bronze
Electroplate
Nylon Coating
Disc Surfacing Halar Coating
Coated with NBR
Coated with PTFE
Stem
Super Duplex Stainless Steel
Monel Metal
NBR
EPDM/EPDM-Food Grade
Seat Viton
Silicon Rubber
PTFE
2
General Features
■ General Features
International Compatibility
Bi-directional Sealing
Full EPDM Lining
Dry Shaft Design
Smaller Operating Torque
Easy installation & Maintenance
Full bore feature
I nternational Compatibility
■ Top Flange: RBV030 Series top flanges mounting meets
ISO 5211 standards for direct mounting of Handles, Gear
Operators, Pneumatic and Electric Actuators. No brackets
are required. This allows for simple installation in the field,
minimizes possible misalignment and reduces overall height.
■ Side Flange: Side flange connection of RBV030 can be

drilled to comply with AWWA C207, ANSI B16.1, ASME 125/150,
DIN PN10/16, BS, JIS or other international flange standards.
B i-Directional Sealing
Concentric resilient seated design features the Series bi-
directional bubble tight shut off with zero leakage. Bi-directional
sealing breaks the directional limitation during installation,
making it much more flexible and more working friendly. Zero
leakage perfects the sealing performance especially in Gas and
Air applications.
3
General Features
F ull EPDM Lining

Full EPDM lined valve interior completely isolating the
line media from the body eliminating unnecessary contacts
between media and body. Body material therefore does not
have to be corrosion resistance materials, which usually being
expensive. This feature lowers the overall cost.
D ry Shaft Design
Alternative to high corrosion resistance shaft materials
the RBV030 valves are equipped with the dry shaft provision.
In that case the standard shaft material is protected from the
medium by applying rubber lining. This lining protects the
standard shaft material against corrosive environments.
4
Leading Design
B ody: One piece U-TYPE body design

with short face to face dimension
comparing with Double Flanged body. All
bodies are drilled to be compatible with
AWWA C207, ANSI B16.1, ASME 125/150, DIN
PN10/16, BS, JIS or other international flange
standards. Threaded holes can be drilled
according to customer preference in case of
the DEAD END SERVICE. Valve mounting top
flanges meet ISO 5211 standards for direct
Zinc Coated mounting of manual operators and power
Epoxy Coating
actuators.
S urface Coating: As standard body

coating, Fusion Bonded Epoxy coating
is applied for excellent corrosion resistance.
Hammer painting, Nylon, PPS, Halar, and
sweat proof coating are available as options.
Machined valve body is carefully prepared

before coating. SISCO standard procedure is
Zinc coated before epoxy coating to achieve
ideal quality. For customers who have special
Hammer Painting requirement of cost saving, sand blasting and
acid-washing is implemented instead of zinc
coating.
PPS
Sweat Proof Coating
5
Leading Design
D isc: The high strength casting discs are

first cast, the sealing edges are spherically
machined, and then hand polished to provide
360° concentric seating bidirectional bubble-tight
shut off, minimum torque and longer seat life. The
symmetrical disc profile enhances valve performance
by increasing the Cv values, reducing turbulence and
increasing pressure recovery. The disc O.D. clearance
is designed to work with all standard piping.
6
Leading Design
S eats: Vulcanized rubber lining and

replaceable tongue and groove lining are two
options for the seat selection. Both options provide
complete isolation of flowing medium from all
valve components (excluding the disc) by a totally
encasing design.
Vulcanized Seat
Relatively smaller operational torque
Vulcanization prevents seat deformation
caused by misalignment pipe line.
Tongue and Groove Seat

Onsite replacement
Wider sealing surface features a molded
tangential O-ring eliminating any need for flange
gaskets.
EPDM is the abbreviated name for Ethylene

Propylene Diene Monomer. In general industry,
one may see other abbreviations or trade names
used in lieu of EPDM such as EPT, Nordel, ECD,
or EPR. Typically these are the same materials as
EPDM. EPDM is a standard seat material offered in
SISCO resilient-seated butterfly valves. It is the most
universal and economical of seat materials offered
by SISCO; that is, it may be used in a wider range of
applications than BUNA-N.
7
Leading Design
S haft: Single shaft pin-less disc connection and

double shafts pin-less disc connection are both
available to choose according to customer's preference.
Alternative to high corrosion resistance shaft materials,

RBV030 is equipped with the dry shaft design because
of its concentric nature and axial sealing design, where
standard material shaft is completely isolated from the
flowing media.
Precision machining of the disc and the stem connection

minimizes hysteresis and produces maximum strength
engagements.
Both disc/stem designs inherently provide complete

protection from particle entrapment and bacterial decay,
protection that is required for sanitary performance. For
superior erosion and abrasion resistance, the one-piece
disc/stem is fully encased in either EPDM or BUNA-N.
For double shafts pin-less design, precision double “D”or

“Square” disc to stem connection drives the disc without
the need for screws or pins. The close tolerance, double“D”
or “Square” connection that drives the valve disc are an
exclusive feature of the SISCO valve. Disassembly of the
shaft is just a matter of pulling the stem out of the disc.
All stem designs incorporate a blow-out proof feature.
B low-out Proof: A retaining ring, installed

between the machined stem groove and gland
retainer step, provides full retention of the stem in the
unlikely event of internal stem failure.
8
Leading Design
S haft Bushing: Non-corrosive, phenolic resin bushing

absorbs actuator side thrust. Brass bushing is also available
to choose.
P rimary & Secondary Seals:These seals prevent

line media from coming in contact with the stem or body.
Primary Seal is achieved by an interference fit of the molded
seat flat with the disc hub. Secondary Seal is created because the
stem diameter is greater than the diameter of the seat stem hole.
Self-adjusting triple O-ring sealing is also applied to give positive
sealing in both directions and prevents external substances from
entering the stem bore.
V ertical Thrust Bearing: A bronze axial thrust

bearing carries the disc weight when installed with shaft
in vertical position and eliminates disc displacement due to the
weight of the stem and disc.

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Company & Products

The RBV030 Series Butterfly Valve is available from

Water & Wastewater Treatment

■ Side Flange: Side flange connection of RBV030 can be

F ull EPDM Lining

B ody: One piece U-TYPE body design

S urface Coating: As standard body

Machined valve body is carefully prepared

Sweat Proof Coating

D isc: The high strength casting discs are

S eats: Vulcanized rubber lining and

Tongue and Groove Seat

EPDM is the abbreviated name for Ethylene

S haft: Single shaft pin-less disc connection and

Alternative to high corrosion resistance shaft materials,

Precision machining of the disc and the stem connection

Both disc/stem designs inherently provide complete

For double shafts pin-less design, precision double “D”or

All stem designs incorporate a blow-out proof feature.

B low-out Proof: A retaining ring, installed

S haft Bushing: Non-corrosive, phenolic resin bushing

P rimary & Secondary Seals:These seals prevent

V ertical Thrust Bearing: A bronze axial thrust

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