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.

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.

Accumulated air can cause catastrophes to the pipeline systems. Generation of vacuum leads to pipeline implosion or pressure transients. The preventive course is use of efficient Air Release valves & use of Anti-Vacuum Valves at the critical locations of the pipeline that are prone to vacuum generation. The R & D Multiple’s Anti- Vacuum valves are designed & manufactured to be extremely responsive & sensitive to the pressure decrease in the line. They instantly allow the entry of sufficient quantity of air at the slight hint of the inception of vacuum & preclude the possibility of vacuum build–up. SALIENT FEATURES : Size range: 150 to 400mm. Pressure ratings: PN10 PN16 & PN24. Material Options: C.I., S.G.I., C.S. (WCB) for Body & Cover, Bronze Dashpot & Seat Ring & Guide Bushes & SS Shaft, Pins, Links & levers. Hydraulic Dashpot arrangement to eliminate slam in closing of the AVV. Externally adjustable Counter-weight arrangement to set the closing torque. Large cowl type covered valve body eliminating any possibility of internal assembly being tampered-with. Provision for mounting of an isolating sluice valve & Air Release valve on the body of the AVV is given.

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: 6101624 Bar. (Class 150 Class125) End connections: Flanged Wafer Lug Wafer.

As per IS & AWWA specs. Circular Square Rectangular openings. Frame Thimble mounting. With flush-bottom seal as option. Metal to Metal or resilient seat options available.

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.

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.

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.

Accumulated air can cause catastrophes to the pipeline systems. Generation of vacuum leads to pipeline implosion or pressure transients. The preventive course is use of efficient Air Release valves & use of Anti-Vacuum Valves at the critical locations of the pipeline that are prone to vacuum generation. The R & D Multiple’s Anti- Vacuum valves are designed & manufactured to be extremely responsive & sensitive to the pressure decrease in the line. They instantly allow the entry of sufficient quantity of air at the slight hint of the inception of vacuum & preclude the possibility of vacuum build–up. SALIENT FEATURES : Size range: 150 to 400mm. Pressure ratings: PN10 PN16 & PN24. Material Options: C.I., S.G.I., C.S. (WCB) for Body & Cover, Bronze Dashpot & Seat Ring & Guide Bushes & SS Shaft, Pins, Links & levers. Hydraulic Dashpot arrangement to eliminate slam in closing of the AVV. Externally adjustable Counter-weight arrangement to set the closing torque. Large cowl type covered valve body eliminating any possibility of internal assembly being tampered-with. Provision for mounting of an isolating sluice valve & Air Release valve on the body of the AVV is given.

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: 6101624 Bar. (Class 150 Class125) End connections: Flanged Wafer Lug Wafer.

As per IS & AWWA specs. Circular Square Rectangular openings. Frame Thimble mounting. With flush-bottom seal as option. Metal to Metal or resilient seat options available.

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.