Special Purpose Rubber Lined Butterfly Valve

Special Purpose Rubber Lined Butterfly Valve

Key Features
  • Full PN 10 pressure rating for the entire range of DN 50  to DN 350.
  • Bi-directional valve with sealing capability to hold rated shut-off pressure in either direction.
  • A unique triple sealing system for shaft sealing eliminates any fugitive emission or secondary leakage.
  • Self-lubricating shaft bearings (PTFE coated stainless steel) for both drive end and non-drive end shaft ensures minimum bearing friction torque.
  • The square coupling disc drive arrangement eliminates the need for taper pins and exposure of metal parts to media.
  • Spherically profiled seat and disc shoulder contact area ensure perfect sealing around the shaft bore and zero leakage.
  • External locking arrangement for the top shaft to make it blow-out proof.
  • Excellent adaptability for actuated operation through standardized top flange dimensions for actuator mounting.
  • Seat liner extending onto the flange contact faces of the body eliminates the need for separate flange gaskets.
  • Controlled compression of the gasket sealing face to offer optimum sealing and prevent gasket face crushing due to over-tightening.

The IVGE 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, rubber encapsulated disc construction and is available in a wafer-lugged body pattern.

The body liner, which also functions as the soft seat, comes in an integrally moulded (bonded) version and offers 100% bi-directional sealing against rated pressures of PN 10. The wafer-style body has a universal design to fit between pipe flanges of almost all popular flange standards.

Applicable standards

General design and manufacturing
Valve face to face dimensionsTop flange drilling
Valve inspection and testing
Flange standard



EN 593
EN 593 / Short wafer as per ISO 5752 Tab 5 & API 609 category A
ISO 5211
EN 12266 Part 1
DIN EN 1092-PN6 / 10 / 16, Class 150
JIS5K / 10K / 16K,
BS 10 tab D & E, IS 6392 Table 11 / 17

Technical Specifications

1. Valve type : Centric Disc Rubber Lined Butterfly valve
with single piece body
2. Body type : Short wafer
3. Seat type : Bonded seat
4. End Connection : Wafer
5. Size range : DN 50  to DN 350
6. Pressure rating : PN 10 (max)
7. Operating temperature range : -250 C to 2000
C (depending on MOC)
8. Seat leakage performance : Tight shut off
9. Operation :
Handlever for sizes from DN 50 to DN 200

Worm gear boxes for sizes from DN 50 to DN 350

Pneumatic / Electric actuator operation-optional
10. Standard Material of Construction
Valve Body : SGI / WCB
Valve Disc : SGI / WCB  (Rubber
Seat Liner : EPDM / Viton / Neoprene
/ Hypalon / Nitrile
Drive end & non drive end shafts : SS 410 / SS 316 SH / 17.4 PH

Material Diagrams

Sizes / Dimensions