General Purpose Rubber Lined Butterfly Valve
IVGK model butterfly valve incorporates the optimum design features to provide long trouble free service in the field. This general purpose soft seated butterfly valve has a fully rubber lined single piece body with centric disc construction and is available in wafer type body pattern.
The body liner which also functions as the soft seat comes in either a replaceable version or an integrally moulded (bonded) version and offers 100% bi-directional sealing against vacuum to rated pressures of PN 10 / PN 16 and fully rated to ANSI 150lb.
The body is designed to fit between 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 | Short wafer (IVGK) |
| Seat type | Replaceable for sizes 50 NB to 600 NB PN 10 rating
Bonded seat for sizes 40 to 1200 NB for all applicable ratings |
| End Connection | Wafer |
| Size range | 40 NB to 1200 NB |
| Operating temperature range | -25C to 180C (Depending on MOC) |
| Pressure rating | 40 NB to 600 NB - PN 16 / PN 20 / Class 150lb 650 NB to 1200 NB - PN 10 max) |
| Operating temperature range | -25C to 200C (Depending on MOC) |
| Seat leakage | Tight shut off |
| Operation | Handlever for sizes from 40 NB to 250 NB
Worm gearboxes for sizes from 40 NB to 1200 NB Pneumatic / Electric actuator |
| Available material of construction (MOC) | |
| Body/Disc | CI / SGI/ WCB/ LCB/ CF8/ CF8M/ AB2/ Duplex/ Super Duplex (1A-6A)/ Hastelloy
Disc also available in Titanium |
| Seat | EPDM / Viton / Nitrile / Neoprene / Hypalon / Silicon |
| Shaft | AISI 410 / SS 316 SH/Monel/UNS32760/Titanium/Hastelloy |
| Other materials available on request |
Dimensions
KEY FEATURES
Unique triple sealing system for shaft sealing, eliminates any fugitive emission or secondary leakage.
Self lubricated PTFE lined bearings for both drive end and non-drive end shaft ensures minimum bearing friction torque.
Seat liner extending on to the flange contact faces, eliminates the need for separate flange gaskets during installation.
Controlled compression of the gasket face to offer optimum sealing & prevent gasket face crushing failure.
Bi-directional valve with tight shut off sealing capability to hold vacuum to rated pressure in either direction.
Excellent adaptability for actuated operation through standardized top flange mounting dimensions for actuator fitment.
Suitability for ON /OFF as well as throttling duties.
Choice of seat and disc materials to suit media conditions and service requirements.
Adaptability to fit between companion flanges of all international flange standards for the wafer style body.
Possibility of lower seat rating to obtain reduced operating torque and extended seat life for low operating pressures