PTFE Lined Butterfly Valve
The ultimate in corrosion resistant Butterfly valve
Intervalve's PTFE lined butterfly valve model IVTFE provides an optimum solution to the corrosion problems encountered by the chemical and process industries with conventional butterfly valves. The PTFE seat liner covers the entire wetted surface of the body and extends around the flange faces thus eliminating the possibility of any media contact with the body.
The fully circular backup elastomer and live loaded disc shoulder sealing ensures bubble tight closing of the valve with zero shaft leakage.
The valve is adaptable for ON / OFF as well as control duty and can be fitted with actuators and accessories as required to meet the specific duty conditions.
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: | API 609 category A |
| Valve face to face dimensions | ISO 5752 Tab 5 & API 609 category A |
| Top flange drilling | ISO 5211 part II |
| Valve inspection & testing | API 598 / ANSI / FCI - 70-2 |
| Flange standard conformity | ANSI 150, DIN PN 10 / PN 16 |
Technical specifications
| Construction type | Centric disc design butterfly valve with PTFE lined body |
| Body type & end connection | Wafer short, 2 piece body |
| Seat type | PTFE / GFT with viton backup ring |
| Size range | 50 NB to 300 NB |
| Pressure rating | PN 10 (max) |
| Operating temperature range | -25C to 200C (Depending on MOC) |
| Seat leakage | Tight shut off (better than class VI as per ANSI / FCI 70-2) |
| Operation | Handlever for sizes up to 200 NB
Worm gearboxes for 50 NB to 300 NB Pneumatic / Electric actuator operation - optional |
| Available material of construction (MOC) | |
| Body/Disc | SGI / WCB / CF8 / CF8M / AB2 / Duplex / Super Duplex (1A-6A) / Hastelloy
Disc also available in Titanium |
| Seat | PTFE |
| Shaft/td> | AISI 410 / SS 316 SH/ Monel/ UNS32760/ Titanium/ Hastelloy |
| Available material of construction (MOC) | |
| Body/Disc | WCB / LCB/ CF8 / CF8M |
| Shaft | AISI 410 / SS 316 SH |
| Other materials available on request |
Dimensions
KEY FEATURES
Full PN 10 pressure rating for the entire range of valve sizes from 50 NB to 300 NB.
Bi-directional valve with sealing capability to hold rated shut off pressure in either direction.
Circularly moulded back up elastomer provides uniform contact pressure over the entire seat without losing shaft bore shape, ensuring bubble tight closure every time.
Unique triple sealing system for shaft sealing, eliminates any fugitive emission or secondary leakage.
Self lubricated shaft bearings (PTFE coated stainless steel) for both drive end and non-drive end shaft ensures minimum bearing friction torque.
Live loaded disc shoulder sealing arrangement through pusher and disc springs in both top and bottom shaft bores, acting on PTFE liner ensures leak free mechanical stem seal.
Back up elastomer standardised in Viton to ensure excellent corrosion protection and maximum temperature resistance against media fumes and higher temperature.
Disc springs and fasteners standardised on corrosion resistant stainless steel to ensure long service.
A choice of exotic metallurgy for the disc, to meet any type of aggressive media.
Choice of liner materials of virgin PTFE or filled PTFE.
Low operating torque enables selection of smaller size actuators.
Perfect adaptability for conversion from manual to actuated operation due to standardised top flange.
Bi-directional valve with sealing capability to hold rated shut off pressure in either direction.
Circularly moulded back up elastomer provides uniform contact pressure over the entire seat without losing shaft bore shape, ensuring bubble tight closure every time.
Unique triple sealing system for shaft sealing, eliminates any fugitive emission or secondary leakage.
Self lubricated shaft bearings (PTFE coated stainless steel) for both drive end and non-drive end shaft ensures minimum bearing friction torque.
Live loaded disc shoulder sealing arrangement through pusher and disc springs in both top and bottom shaft bores, acting on PTFE liner ensures leak free mechanical stem seal.
Back up elastomer standardised in Viton to ensure excellent corrosion protection and maximum temperature resistance against media fumes and higher temperature.
Disc springs and fasteners standardised on corrosion resistant stainless steel to ensure long service.
A choice of exotic metallurgy for the disc, to meet any type of aggressive media.
Choice of liner materials of virgin PTFE or filled PTFE.
Low operating torque enables selection of smaller size actuators.
Perfect adaptability for conversion from manual to actuated operation due to standardised top flange.