Intervalve / IV butterfly and blind valves from Frenstar Limited UK

Double Offset Double Flanged Butterfly Valve

Type IVDXR double flanged range of Butterfly valves are double eccentric disc design, Which practically eliminates any seat wear. The fully replaceable seat fitted periphery on the disc is field replaceable and is capable of achieving bi-directional sealing.

IVDXR is available either in Cast or fully fabricated design. The face to face dimensions can be either as per BS (Series BC & BF) or as per AWWA (Series AC & AF).

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	EN593/ API 609
Face to face dimensions	Short pattern EN593 / API609 / ISO 5752 series-13 / AWWA C504
Top flange drilling	ISO 5211
Valve inspection & testing	API 598 / EN593
Flange standard conformity	ANSI B16.5#150 sizes up to 600mm, ANSI B16.47 series A & B for sizes 650mm and above, DIN PN6 / PN10 / PN16
	WRAS Materials available on request

Technical specifications

Valve type	Double offset disc double flanged Butterfly valve
Body type	Double flanged short
Seat type	Fully replaceable fitted on the disc periphery
End Connection	Flanged
Size range	400 NB to 1200 NB
Pressure rating	PN 10
Operating temperature range	0C to 180C (Depending on MOC)
Seat leakage	Tight shut off
Operation	Worm gear, Pneumatic & Electric actuators
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 410 / 17-4 / Monel / Super Duplex
	Other materials available on request

Dimensions

KEY FEATURES

Perfectly machined Stainless steel seat ring with specially designed sealing profile of the rubber ensures continued tight shut off sealing and makes it an ideal choice for flow isolation and shut off duties.

The double offset disc design ensures minimal seat wear and provides excellent throttling capabilities.

Adjustable mechanical stopper provided on valve body ensures precise closing of the disc without over/under travel.

Both drive end and non drive end shafts are fully blowout proof and guided by self lubricated bush bearings.

Axial thrust bearing provided on valve ensures precise positioning of the disc and prevents unequal loading of the valve seat, it also enables installation of valve in any orientation of required.

Special Shaft sealing arrangement ensures zero fugitive emission and enables field replacement of shaft sealing elements.

The seat provided on the disc is fully field replaceable and ensures optimum seating/reseating torque.

A choice of seat materials makes the valve suitable for gas or liquid service with a host of applications.