Double Flanged Centric Disc Rubber Lined Butterfly Valve

Double Flanged Centric Disc Rubber Lined Butterfly Valve

Key Features
  • Fully rubber-lined body, with lining extending upto the flange contact face to make gasket free sealing.
  • Ideal valve for installation with lined pipes, since the disc chord interference with pipe ID is negligible.
  • Controlled compression of the gasket face offers optimum sealing and prevents gasket face crushing.
  • Unique triple sealing system, for shaft sealing to ensure zero secondary leakage.
  • Self lubricated PTFE lined bearings, for both drive end and non-drive end shafts, ensures minimum bearing friction.
  • Bi-directional tight shut off sealing from vacuum to rated pressure.
  • Excellent adaptability for actuated operation through standardized ISO top flange.
  • Universal top square shaft enabling direct actuator fitment, after removal of Hand lever, for sizes upto DN200.
  • Choice of seat and disc materials to suit media and operating conditions.
  • Enables installation close to other pipe fittings, without disc interference.
  • Preferred design for desalination plants, municipal water supply and Effluent plants.
  • Adjustable bottom thrust pad / bearing for DN250 and higher to take care of axial thrust loading.
  • DN600/DN650 size provided with “O Ring holder” type drive end shaft sealing arrangement for extra reliability.

The most sought-after design by desalination plants and utility installations, IVDF represents the state-of-the-art rubber-lined Flanged double valve, meeting all the user industry requirements.

The double-flanged body pattern ensures precise installation in the pipeline and can be used as an end to the line valve if required. The unique feature of this valve, is its adaptability for lined pipes, due to negligible disc protrusion beyond the body laying length. The universal square top shaft on valves up to DN200 enables easy change over from hand lever operation to actuated operation when required.

Applicable standards

General design & manufacturing
Valve face to face dimension

Top flange drilling
Valve Inspection & Testing
Flange Standard

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EN 593 / API 609 / IS 13095
Double flanged Short Pattern to EN593  / API 609
IS 13095 / ISO 5752 series-13
ISO 5211
EN 12266 Part 1 / API 598
DIN EN 1092-PN6 / PN10 / PN16 or BS 4504 / Class 150
AW AC 207 Class – B & D

Technical Specifications

1.Valve type:Centric Disc Rubber lined Flanged end Butterfly valve
2.Body type:Double Flanged Short
3.Seat (liner) type:Integrally Bonded with body
ID
4.End connection:Flanged Ends (Double Flanged)
5.Size Range:*DN 50 to DN 600 – ASME Class
150 (max)
6.Pressure rating:* DN 650 to DN 1200-PN10
(max)
7.Operating temperature range:-250 C to 2000
C (depending on MOC)
8.Seat leakage:Tight shut off
9.Operation:Hand Lever for sizes upto
DN200 or Worm Gear,
Pneumatic or Electric Actuators
10.

Standard Material of Construction
(MOC)

Valve Body:CI / SGI / WCB
Disc:SGI / WCB / CF8 / CF8M
Bonded Seat:Nitrile / EDPM / Neoprene
/ Hypalon
Drive end & non drive end shaft:SS 410 / SS 17.4 PH / SS 316
BearingSteel+PTFE or SS316+PTFE

Material Diagrams

Sizes / Dimensions