VALVES
BUTTERFLY VALVES
R & D Multiple’s butterfly valves have been very commonly used in various water supply schemes all over India for past 2 decades. Irrespective of sizes, pressure ratings, fluids handled, type of operators etc. our BF valves are the most preferred choice of the discerning customers. We have also kept our valves in tune with the latest technological advancements in materials, manufacturing, pattern making & foundry & operators fields. This has enabled us to offer valves from 50mm to 3500mm sizes in pressure ratings of 6 to 40bar, in Cast / Fabricated constructions in Cast Iron, Carbon & Alloy Steels & Stainless Steels & also rubber-lined variety. The types of operators offered are Manual, Electrical, Pneumatic & Electro- Hydraulic. We also supply large Hydraulically operated Pump discharge valves (HOPD). |
SALIENT FEATURES :
A. Large DF Butterfly Valves :
- Sturdy & robust construction.
- Disc assembly perfectly centered & secured in valve Body bore.
- Seat Ring cone finished in- situ.
- Flow through disc ensuring minimum pressure drop.
- Secured Disc-Shaft Connection.
- Cast & Fabricated constructions possible.
- Compliance with: IS 13095, AWWA C504, BS 5155 standards.
- Manual, Electrical, Pneumatic & Electro- Hydraulic Operators.
- NDE side thrust arrangement.
- Shaft Seals comprising of elastomeric ‘O’ rings & ‘Lip seals’.
- Disc Seal secured in- between machined grooves in Disc & Clamping Ring making it completely washout-proof.
- Perfection of alignment of components, fine finishing of rubbing surfaces, controlled seal dimensions ensure very smooth operation & less operating torque requirement.
B. Wafer-lined Butterfly Valves :
- Liner locked in precision machined grooves in valve body.
- Sealing ribs on end faces with enough protrusion to ensure drop-tight end face joints.
- Sturdy & long shaft bearings ensuring precise rotation of the disc assembly in the body.
- Double shaft seal which precludes leakage possibility.
- Sturdy disc –shaft connection.
- Robust Hand Lever mechanism without backlash & possibility of over-travel due to provision of in-built, positive travel limit stops.
- Possibility of offering Electrical / Pneumatic actuator.
SPECIAL FEATURES :
A. Large DF Butterfly Valves :
- Flow through disc ensuring minimum pressure drop.
- Disc locking arrangement optionally available.
- Wide options in : Materials of construction,
: End Connections,
: Face to Face dimensions.
- Shaft Bearings not wetted by fluid handled ensuring low frictional torque & long bearing life.
- Concentric, Single, Duo & Tri-eccentric constructions offered for appropriate applications.
- Endurance Life Cycle Testing carried out for prototype sample sizes as per AWWA C504 covering all the range of manufacturing.
- Perfection of alignment of components, fine finishing of rubbing surfaces, controlled seal dimensions ensure very smooth operation & less operating torque requirement.
B. Wafer-lined Butterfly Valves :
- Optimized liner dimensions ensuring efficient sealing performance.
- Critically controlled interference between the Rubber liner & the Disc sealing surface ensuring leak-tightness & lower operating torque at the same time leading to long seal life.
- Stainless Steel Investment cast Disc as a standard scope of supply.
- For HOPD & Special requirements, contact our Marketing office.
R&D Multiples delivers 3000mm/120” BFV - 19 nos (PN 1.6 MPa) in a record time of 5 months
In a yet another milestone for R&D Multiples, we are proud to announce that we have successfully delivered 19 nos of 3000mm/120’’ Butterfly valves with a design pressure rating of 1.6 MPa in a record time of 5 months post manufacturing clearance from the client. These valves will subsequently be installed in the prestigious Narmada Malwa Gambhir river link project in the state of Madhya Pradesh, India. This project intends to provide irrigation facilities in 158 villages covering 50,000 hectares of area in Indore and Ujjain districts.
Technical specifications for these valves were as per the following:
Basic Design
Design Standard: Face to Face dimension as per AWWA C516
Flange Drilling Standard: AWWA C207 Class D (Flat Face)
Design Pressure: 1.6 MPa
Mode of Operation: Manually operated through R&D Multiples make Quarter-turn worm gearbox with hand-wheel
Material of Construction
Body & Disc: S.G. Iron IS 1865 Gr.400/12
Shaft, Shear Pin: Stainless Steel IS 6603 Gr.15Cr16Ni2
Disc Seal Ring: EPDM Rubber
Body Seat Ring: Nickel Weld Overlay micro-finished
Clamping / Seal Retaining Ring: Stainless Steel AISI 304
Testing
Seat test pressure: 17.6 kg/cm2
Body test pressure: 24 kg/cm2
Disc strength test: 24 kg/cm2
The activities conducted during these 5 months include detailed engineering, FEA analysis (for optimization of the design), pattern making and then procurement of castings from a reputed, wellequipped foundry. Our team then worked round the clock to make sure that we meet the required delivery deadline. This is the largest diameter valve that we have manufactured till date and beats our previous best of 2800mm/112” hydraulically operated butterfly valve that we manufactured in 2016 for NTPC’s Kudgi thermal power station. In addition to these 19 valves, we also delivered 122 nos of valves (butterfly and gate valves combined) for the same project of sizes ranging from 200mm to 2500mm in the same timeframe. This further demonstrates our execution capabilities and is a clear source of advantage to all our customers.
Note: 1st valve ready to leave our factory from Pardi, Gujarat
About R&D Multiples:
We are one of the leading manufacturers of valves used in waterworks applications all over India. Founded over 3 decades ago, we have developed a wide product range over the years. We make valves up-to 3.5 meters size & 40 bar pressure ratings. A wide variety of operators & actuators as drives & many accessories are also offered to make the valve versatile & user friendly. The materials offered to suit customer specifications range from Cast Iron, Carbon Steel, Stainless steel & other corrosion resistant/ high strength alloys.
For more details please visit our website www.rdmultiples.com
For enquiries, please write to us at mumbai@rdmultiples.com