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

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

Feature	Value
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

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