Double Flanged Butterfly Valve
Type IVDF double flanged butterfly valve incorporates design features to provide long trouble free service.
Construction is a one piece cast body with a full width integrally bonded liner offering a 100% bi-directional sealing for vacuum and rated pressures up to PN 25.
Alignment to fit all international flange standards.
Conformity to codes and standards:
Complies with the requirements of European Pressure Equipment Directive PED 97/ 23 / EC
Complies with the requirements of ATEX 94 / 9 / EC
Complies with the requirements of ATEX 94 / 9 / EC
| General design & manufacturing | BS 5155 / API 609 |
| Top flange drilling | ISO 5211 part II |
| Valve inspection & testing | API 598 / BS 6755 |
| Flange standard conformity | ANSI 150, DIN PN6 / PN10 / PN16 / PN25, JIS 5K / 10K / 16K, ANSI B16.47 series A & B |
| WRAS Materials available on request |
Technical specifications
| Valve type | Centric disc design butterfly valve with a single piece rubber lined body |
| Body type | Double flanged short |
| Seat type | Bonded on all sizes |
| End Connection | Flanged |
| Size range | I50 NB to 2400 NB |
| Pressure rating | To PN 25 |
| Operating temperature range | -25C to 200C (Depending on MOC) |
| Seat leakage | Tight shut off |
| Operation | Handlever for sizes 50 mm to 200 mm Worm gearboxes for sizes 50 NB to 2400 NB Pneumatic / Electric actuator optional |
| Available material of construction (MOC) | |
| Body/Disc | SGI / WCB / LCB / CF8 / CF8M /AB2 / Austenitic Stainless Steel (6MO) / Super Duplex
Disc also available in Titanium |
| Seat | EPDM / Nitrile / Viton / Silicon |
| Shaft | AISI 430 / 17-4 / Monel / Super Duplex |
| Other materials available on request |
Dimensions
KEY FEATURES
Self lubricating PTFE lined bearings for both drive end and non drive end shaft ensures minimum bearing friction torque.
Seat liner extending onto the flange contact faces eliminates the need for separate flange gaskets during installation.
Bi-directional valve with tight shut off capability to hold vacuum to rated pressure in either direction.
Excellent adaptability for actuated operation through standardized top mounting dimensions.
Suitability for ON / OFF as well as throttling duties.
Choice of disc and seat materials to suit media and service requirements.
Possibility of lower seat rating to obtain reduced operating torque and extended seat life for low operating pressures.
Seat liner extending onto the flange contact faces eliminates the need for separate flange gaskets during installation.
Bi-directional valve with tight shut off capability to hold vacuum to rated pressure in either direction.
Excellent adaptability for actuated operation through standardized top mounting dimensions.
Suitability for ON / OFF as well as throttling duties.
Choice of disc and seat materials to suit media and service requirements.
Possibility of lower seat rating to obtain reduced operating torque and extended seat life for low operating pressures.