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Intervalve DXR double flanged range of valves are double
eccentric design butterfly valves. These are available in cast
as well as fully fabricated design. The face to face
dimensions can be either as per BS-EN (Series BC & BF) or as AWWA
(Series AC & AF).
These valves incorporate a double offset disc design, which
practically eliminates any seat wear. The fully replaceable
seat provided on the disc periphery is field replaceable and
is capable of achieving bi-directional sealing. The rubber
seat seals against a Stainless Steel seat ring integrally
welded with the body.
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MODEL VARIANTS:
THERE ARE FOUR DISTINCTLY DIFFERENT MODELS AVAILABLE IN THE
IVDR RANGE. EACH DESIGNED TO MEET SPECIFIC APPLICATION
REQUIREMENTS, TECHNICAL SPECIFICATIONS OF THESE MODELS ARE
TABULATED BELOW WITH SHORT DESCRIPTION OF EACH MODEL VARIANT. |
MODEL |
IVDXR-BFL |
IVDXR-BF |
IVDXR-BC |
IVDXR-AC |
GENERAL DESIGN |
EN 593 / IS 13095 |
AWWA C504 |
FACE TO FACE DIMENSION |
Short Series as per BS 5155, Series
13 as per EN 588-1(EN 593), Short as per ISO 5752 Tab-4 |
AWWA C504 |
TOP FLANGE |
ISO 5211 |
ISO 5211 |
INSPECTION & TESTING |
EN 12266 PT-1 / IS 13095 |
AWWA C504 |
FLANGE STANDARD |
DIN EN 1092-1 & 2, BS 4504 / IS 6392 / ANSI B 16.47
/
B 16.47 |
ASME B 16,1 /
AWWA C207 |

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MODEL |
IVDXR-BFL |
IVDXR-BF |
IVDXR-BC |
IVDXR-AC |
VALVE TYPE |
Flanged End Double Offset Disc Butterfly
Valve of Fabricated Construction |
Flanged End Double Offset Disc Butterfly
Valve of Cast Construction |
BODY TYPE |
Flanged Short Body |
BODY SEAT |
Stainless Steel Ring Welded on to Valve Body |
Stainless Steel Ring Bolted on to Body
(Replaceable) |
DISC TYPE |
Double Offset Mounted on Stub Shafts |
DISC SEAL (SEAT) |
Replaceable 'O' Ring, Clamped on Disc |
Replaceable Type Clamped on
Disc Edge with Anchoring Rib |
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SHAFTS/SPINDLE |
Stub Shafts (DE & NDE), Blow Out Proof |
Stub Shafts Blow Out Proof |
Stub Shafts (DE & NDE), Blow Out Proof |
SIZE RANGE |
DN 600 - DN 1200 |
DN 400 - DN 1200 |
DN 65 - DN 2400 |
DN 80 - DN 1800 |
PRESSURE RATING |
PN 1.0, PN 2.5 |
PN 6, PN 10 |
PN 6, PN 10, PN 16 |
AWWA C504 CL-75 / 150 |
OPTG TEMP |
0° C TO 180° C |
0° C TO 180° C |
0° C TO 180° C |
0° C TO 180° C |
SEAT TIGHTNESS |
Tightness Shut Off |
Tightness Shut Off |
Tightness Shut Off |
Tightness Shut Off |
OPERATION |
Worm Gear / Electric/ Pneumatic Actuator |
MATERIAL OF CONSTRUCTION |
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IVDXR-BFL |
IVDXR-BF |
IVDXR-BC |
IVDXR-AC |
BODY & DISC |
Carbon Steel Plates / Sections as per IS 2062,
IS 2002, A516 GR 70, Stainless Steel Plates / Sections
SS 304 / SS 316 |
CI, SGI, WCB
CF8, CF8M |
CI, SGI, WCB
CF8, CF8M |
BODY SEAT |
Stainless Steel SS 304 / SS 316 |
Stainless Steel SS 304 / SS 316 or SS 410 |
CLAMPING RING |
Carbon Steel IS 2062 / A516 GR. 70, Stainless
Steel SS 304, SS 316 |
Carbon Steel IS 2062 GR. B, Stainless Steel SS 304, SS 316 |
DISC SEAL (SEAT) |
NBR, EDPM, Silicon, Viton |
NBR or EPDM |
SHAFTS |
SS 410 / 17.4 PH / SS 316 |
SS 410 / 17.4 PH / SS 316 |
SHAFT BEARING |
Self Lubricating (Steel + PTFE) |
Self Lubricating (Steel + PTFE) |
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Srl. # |
PART DESCRIPTION |
QTY. |
MATERIAL |
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Srl. # |
PART DESCRIPTION |
QTY. |
MATERIAL |
1 |
BODY |
1 |
ISO2062 Gr.B |
11 |
TOP SHAFT |
1 |
SS410 / SS316 SH /17.4 PH |
2 |
BODY SEAT |
1 |
CA15 / SS304 / SS316 |
12 |
O-RING HOLDER |
1 |
SS304 / SS316 |
3 |
DISC |
1 |
ISO2062 Gr. B / SS304 / SS316 |
13 |
O-RING TOP BUSH-(OD) |
2 |
NITRILE / EDPM / VITON |
4 |
DISC SEAL |
1 |
NITRILE/EDPM/VITON/SILCONE |
14 |
O-RING TOP BUSH-(ID) |
2 |
NITRILE / EDPM / VITON |
5 |
SEAT CLAMPING RING |
1 |
ISO2062 Gr.B / SS304 / SS316 |
15 |
TOP SHAFT RETAINER |
1 |
STEEL + AL. BRONZE |
6 |
SHAFT O-RING |
2 |
NITRILE / EDPM / VITON |
16 |
THRUST PAD |
1 |
AL. BRONZE |
7 |
BEARING BOTTOM |
2 |
STEEL+PTFE / SS316+PTFE |
17 |
GASKET |
1 |
CAF / NITRILE |
8 |
BOTTOM SHAFT |
1 |
SS410 / SS316SH /17.4PH |
18 |
BOTTOM COVER |
1 |
ISO2062 Gr.B / SS304 / SS316 |
9 |
TAPER PIN |
3 |
SS316 SH / 17.4PH |
19 |
WORM GEAR |
1 |
CI HOUSING+EN8 I/P SHAFT |
10 |
BEARING TOP |
2 |
STEEL+PTFE / SS316+PTFE |
20 |
HAND WHEEL |
1 |
MS+EPOXY |
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Srl. # |
PART DESCRIPTION |
QTY. |
MATERIAL |
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Srl. # |
PART DESCRIPTION |
QTY. |
MATERIAL |
1 |
BODY |
1 |
CI / SGI / WCB |
11 |
TOP SHAFT |
1 |
SS410 /SS316SH /17.4PH |
2 |
BODY SEAT |
1 |
CA15 / SS304 / SS316 |
12 |
O-RING HOLDER |
1 |
SS304 / SS316 |
3 |
DISC |
1 |
CI / SGI / WCB / CF8 / CF8M |
13 |
O-RING TOP BUSH-(OD) |
2 |
NITRILE / EDPM / VITON |
4 |
DISC SEAL |
1 |
NITRILE/EDPM/VITON/SILCONE |
14 |
O-RING TOP BUSH-(ID) |
2 |
NITRILE / EDPM / VITON |
5 |
SEAT CLAMPING RING |
1 |
ISO2062 Gr.B / SS304 /SS316 |
15 |
TOP SHAFT RETAINER |
1 |
STEEL + AL. BRONZE |
6 |
BODY SEAL |
1 |
NITRILE / EDPM / VITON |
16 |
THRUST PAD |
1 |
AL. BRONZE |
7 |
BEARING BOTTOM |
1 |
STEEL+PTFE / SS316+PTFE |
17 |
GASKET |
1 |
CAF / NITRILE |
8 |
BOTTOM SHAFT |
1 |
SS410 / SS316SH /17.4PH |
18 |
BOTTOM COVER |
1 |
ISO2062 Gr.B / SS304 / SS316 |
9 |
TAPER PIN |
1 |
SS316 SH / 17.4PH |
19 |
WORM GEAR |
1 |
CI HOUSING+EN8 I/P SHAFT |
10 |
BEARING TOP |
1 |
STEEL+PTFE / SS316+PTFE |
20 |
HAND WHEEL |
1 |
MS+EPOXY |
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Srl. # |
PART DESCRIPTION |
QTY. |
MATERIAL |
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Srl. # |
PART DESCRIPTION |
QTY. |
MATERIAL |
1 |
BODY |
1 |
CI/SGI/WCB |
11 |
TOP SHAFT |
1 |
SS410 /SS316SH /17.4PH |
2 |
BODY SEAT |
1 |
CA15/SS304/SS316 |
12 |
O-RING HOLDER |
1 |
SS-304/SS-316 |
3 |
DISC |
1 |
CI/SGI/WCB/CF8/CF8M |
13 |
O-RING TOP BUSH-(OD) |
2 |
NITRILE/EDPM/VITON |
4 |
DISC SEAL |
1 |
NITRILE/EDPM/VITON/SILCONE |
14 |
O-RING TOP BUSH-(ID) |
2 |
NITRILE/EDPM/VITON |
5 |
SEAT CLAMPING RING |
1 |
ISO2062 Gr.B/SS304/SS316 |
15 |
TOP SHAFT RETAINER |
1 |
STEEL + AL. BRONZE |
6 |
BODY SEAL |
1 |
NITRILE/EDPM/VITON |
16 |
THRUST PAD |
1 |
AL. BRONZE |
7 |
BEARING BOTTOM |
1 |
STEEL+PTFE/SS316+PTFE |
17 |
GASKET |
1 |
CAF / NITRILE |
8 |
BOTTOM SHAFT |
1 |
SS410 / SS316SH /17.4PH |
18 |
BOTTOM COVER |
1 |
ISO2062 Gr.B/SS304/SS316 |
9 |
TAPER PIN |
1 |
SS316 SH / 17.4PH |
19 |
WORM GEAR |
1 |
CI HOUSING+EN8 I/P SHAFT |
10 |
BEARING TOP |
1 |
STEEL+PTFE/SS316+PTFE |
20 |
HAND WHEEL |
1 |
MS+EPOXY |
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Perfectly machined stainless steel seat ring with
specially designed sealing profile of the rubber ensures
continued tight shut off sealing and makes it an ideal
choice for the flow isolation and shut off duties.
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The double offset disc design ensures minimal seat wear
and provides excellent throttling capabilities, which
makes it an ideal choice for flow control duties.
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Adjustable mechanical stopper provided on valve body
prevents over travel of disc and ensures precise closing.
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Actuator (operator) mounting flange standardized to ISO
5211 with provision of locational spigot, ensures direct
mounting of actuators and gear boxes without any radical
loading of shafts.
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Both Drive end and non drive end shafts are fully
blowout proof and guided by self lubricated bush bearings.
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Axial thrust bearing provided on valves, ensures
precise positioning of the disc and prevents unequal
loading of the valve seat.
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Special shaft sealing arrangement ensure zero fugitive
emission and enables field replacement of shaft sealing
elements.
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The seat (sealing element) provided on the disc is
fully field replaceable and ensures optimum seating /
unseating torque.
- A choice of seat materials makes the valve suitable for
gas or liquid services with a host of applications.

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