SALIENT FEATURES :     > Sturdy, circularly balanced construction. > Large, Hydro-dynamic flow passages. > Mounting Feet to ensure perfect alignment & to secure the valve for silent & smooth operation over very long life-span. > Lifting Lugs. > Options of Resilient & Metal to Metal seats with Corrosion Resistant Body Seat Ring & Metal / Resilient Piston / Plunger Seal. > All working child parts in Stainless Steel. > Double 'O' Ring Type Shaft seals. > All pin-bearing contacts with anticorrosion bearing bushes. > Circularly balanced Valve. > Manual (through quarter-turn gearbox), Electrical (through multi-turn actuator), Pneumatic Actuation options available. > Can be installed in a SCADA based water grid management system. Regulating type intelligent valve actuators can be looped into SCADA /PLC systems to auto- regulate the flow/ pressure in the grid using multiple numbers of valves of different sizes. .  

    The latest series of R & D Multiple’s Combination type : (Air Vacuum + Air Release Valves) amalgamates exotic features with excellent workmanship to make them the unique solution for any challenging application. Be it the filling / draining of the pipeline, on-line (under flow & pressure) air release, or the anti-vacuum function at the time of pump tripping, the ‘R & D Multiple's Bi-Stream Air Release Valve’' is the ultimate & most reliable solution.       SALIENT FEATURES :       Very efficient air release/ inlet mechanisms. Specially designed tamperproof cover allowing free, all-round (360 Degrees) air movement. Stainless Steel Float & Cage design allowing precision, long guides to the Float all through-out the travel ensuring perfectly centred float always. Aero-Dynamically designed large flow passages. Combination of Air-Vacuum & Air Release functions. Sturdy & Robust construction. Float not subjected to differential pressure & hence chances of sticking/ necking are precluded. Choice of shell MOC : CI / SGI / CS / SS / D2 to suit applications. All internal active working parts: Stainless Steel. PN10 / 16 /25 Pressure Ratings. (Enquire for Others). Complies with the requirements of IS 14845 & AWWA- C512.       SPECIAL FEATURES :       Efficient Aero-dynamic flow passages. One Piece Tamper-proof Cover. Straight through air release opening of large size. Guaranteed long life resilient seats.    Floats of optimum specific gravity ensuring quick response to level changes. Aerodynamic performance tested & proven at FCRI. Many, many successful, prestigious installations.

Rising & Non Rising Stem Types. Size Range 50mm to 1200mm. as per AWWA standard. Glandless construction. EPDM / Nitrile lining material. Fusion Bonded Epoxy (FBE) coating.

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).         In short we provide techno-commercially best solution to any installation in which use of Butterfly Valves is envisaged.       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.      

Sluice valve is the most populous & relied upon water-works valve since decades. R & D Multiple’s Sluice Valves are consciously built to fulfill customer’s expectations & faith. They not only comply with the requirements of the specifications & codes, but also offer features, accessories, quality & workmanship levels which make them the unique choice for any waterworks isolation application. Accessories such as: Gearing (SpurBevel), Thrust Bearing, Actuators (Electrical Pneumatic), By–Pass, Position Indicator, Channel & Shoe, Chain-wheel Cap-Top operation etc. can be offered.

        R & D Multiple’s Dual Plate Check Valves combine the best features with top class workmanship making them unique for any kind of waterworks applications. The clamped resilient seat on Body is a feature which combines high seal integrity & assurance against seal wash-off. Independent spring action for each plate ensures that the spring twist is half compared to the conventional designs. This greatly enhances the life of the springs. Considering features as above & many others, R & D Multiple’s Dual Plate Check Valves will give you the best in areas of Features, Workmanship, Initial & running costs. This is the best choice.       SALIENT FEATURES :       Clamped Resilient seal on valve Body. This seal is replaceable on site. Independent  spring action for each plate. The pins are precisely & permanently centered in the valve body. The shock dampers ensure that there is no undue load on the Stop Pin & that the spring twist also is maintained in limit. ‘Heeling effect’ for the plates provided to avoid rubbing of the seats near closure. Wide choice of materials of construction available: Shell: C.I./S.G.I./WCB/ S.S./ D2:   Seats: Rubber with S.S. / S.S. with S.S., pins: S.S. Size Range: 50mm to 3000mm, Pressure Ratings: 6/10/16/24 Bar. (Class 150/ Class125) End connections: Flanged / Wafer/ Lug Wafer.       SPECIAL FEATURES :       Independent support also ensures that each of the plates revolves from full close to full open & reverse with-out bearing on each other.  Large & hydrodynamic flow passages ensure minimum pressure drop. ‘Low Torque’, ‘Standard Torque’ & ‘High Torque’ spring options available depending upon site parameters.