R&D Multiples launches its new range of Triple Offset Butterfly Valves
  September 19, 2016.

Keeping in mind the growing needs of the market, we have launched our new series of high performance, zero leakage, triple-offset butterfly valves. This is in continuation to our motto of “Growth through Innovation” and we intend to aggressively invest in our infrastructure, certification processes and personnel to further make inroads in this segment. This launch also marks our first step towards catering to valves for the process industry. Some of the key features/benefits of our design are outlined as follows:

  • Metal seated, bi-directional zero leakage and inherently fire safe
  • Non rubbing rotation ensures that above features are maintained during life cycle of valve
  • Reliable and safe operation for on-off / isolation and control applications
  • Can replace gate, globe and ball valves with substantial reduction in space and weight
  • Substantially reduced operational maintenance
  • Replaceable seat option means client need not replace entire body and this substantially reduces the cost of ownership
  • One piece shaft is designed to transfer and maintain torque ensuring maximum robustness
  • Shaft is retained internally and externally for full compliance to blow out proof requirement ensuring safety of plant personnel
Constructional Features:
Size range: 3” to 60” (80mm to 1500mm)
Pressure rating: Upto ASME Class 600 (others available on request)
End Connection: Wafer lug, Double Flanged, Butt Weld (others available on request)
Manufacturing Standards:
  • Design: API 609, ASME B 16.34, EN 593, ASME Section VIII
  • Face to Face: EN 558, API 609, ISO 5752, ASME B16.10
  • End Connection: ASME B16.5 / B16.47, EN 1092-1, ISO 7005, ASME B16.25
  • Testing: API 598, API 6D (Zero leakage)
  • Marking: MSS-SP-25, CE
  • Quality Assurance: ISO 9001
Temperature range: -600C to 4500C (-76F to 842F; other high temperature and cryogenic applications also available)
Fluids: Steam superheated and saturated, hydrocarbons, H2, 02, hot gases, flare gases, chemical solvents, air, water etc
Applications: Oil & Gas processing, refineries, hydrocarbon storage and transportation, power plants, chemical and petrochemical plants, steel mills, sugar mills, paper and pulp
Materials of Construction:
  • Body/Disc: WCB, CF8M, LCB, WC6, CF3, CF3M
  • Seat ring: Bolted or integral versions; SS316 deposited, Stellite21 deposited, SS304, SS316
  • Laminated seal: UNS S31803 + Graphite; UNS S20910 + Graphite; SS316 + Graphite
  • Shaft: F6a, XM-19, UNS N07718, SS316, A479 type 410
  • Bush/Sleeve & thrust bearings: SS316/UNS 20910 nitrided

Triple offset – the concept explained

Compared to a concentric valve, there are three eccentricities in this product which offers the benefits as discussed above. The first eccentricity (seal ring offset from the shaft centre line) ensures that the seal and seat ring is in one piece without shaft interruption. The second eccentricity (shaft offset from pipe centre line) gives the non-symmetric trim design. This is useful for higher safety integrity applications where fail to open/close features can be used to assist required fail safe position with correct installation of valve to flow / high pressure direction. It also ensures that the seal does not contact the seat ring at full open position. The third eccentricity (seat and seal cone centre lines being inclined to pipe centre line) completely eliminates rubbing between seat and seal throughout 900 rotation.
Our design ensures that the seal contacts the seat ring only at the final stage of closing and there is no rubbing / skidding thereby precluding any galling and wear. The resiliency of the disc seal ensures that it adjusts to the seat ring surface thereby developing uniform compressive force between the seating surfaces. This guarantees perfect bubble-tight sealing contact, not only during normal operating conditions but also during thermal cycling.
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
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