IVTL 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 a centric disc construction and is available in wafer lugged style body pattern to ensure precise location in pipe line.

The body liner which also functions as the soft seat comes either in 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 tapped lug version can be used as end of line valves

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	API 609 category A / BS 5155 / MSS SP-67
Valve face to face dimensions	Short wafer or wafer lugged as per ISO 5752 Tab 5 & API 609 category A
Top flange drilling	ISO 5211 part II
Valve inspection & testing	API 598
Flange standard conformity	ANSI 150, DIN PN6 / PN10 / PN16, JIS 5K / 10K, BS10 Tab D & E For sizes 650 ANSI B16.47 Class 150 Series A / BS 3293 Class 150 and Series B / API 605

Technical Specifications

Feature	Value
Valve type	Centric disc design butterfly valve with a single piece rubber lined body
Body type	Wafer lugged
Seat type	Replaceable for sizes 50 NB to 600 NB PN 10 rating Bonded seat for sizes 40 to 1200 NB for all ratings
End Connection	Wafer lugged
Size range	40 NB to 1200 NB
Pressure rating	40 NB to 600 NB PN 16 / PN 20 / Class 150lb 650 NB to 1200 NB - PN 10 (max) Others on request
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 gear boxes for sizes from 40 NB to 1200 NB Pneumatic / Electric actuator - optional
Available material of construction (MOC)
Body/Disc	CI / SGI / WCB / LCB / CF8 / CF8M / AB2 / Duplex / Super Duplex (1A-6A) Austenitic Stainless Steel (6MO) / Hastelloy Disc also available in Titanium
Seat	EPDM / Viton / Nitrile / Neoprene / Hypalon / Silicon
Shaft	AISI 410 / SS 316 SH
Available material of construction (MOC)
Body/Disc	WCB / LCB/ CF8 / CF8M
Shaft	AISI 410 / SS 316 SH 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 vaccum to rated pressure in either direction.
Excellent adaptability for actuated operation through standardised 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.
The lugged wafer pattern ensures precise self centering of valve between mating flanges.
Possibility of lower seat rating to obtain reduced operating torque and extended seat life for low operating pressures.