IVGK-25 General Purpose Rubber Lined Butterfly Valves

IVGK-25 General Purpose Rubber Lined Butterfly Valves

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 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.
  • Adaptability to fit between companion flanges of all popular 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.
  • Valves of DN 250 and higher are provided with bottom thrust bearings
  • Valves of DN 600 and higher are provided with additional top shaft sealing and guide brush.

IVGK-25 modular design 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 an integrally molded (Bonded) version and offers 100 % bi-directional sealing with a dry shaft design.

The drive-to shaft attachment is through a square drive eliminating dowelling between the disc & drive end shaft.

Applicable Standards

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



API 609 category A / EN 593
API 609 category A / EN 593
short wafer as per ISO 5752 Tab 5
ISO 5211
API 598 / EN 12261 Part 1
Class 150, DIN EN 1092 – PN 6 / PN 10 / PN 16,
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 a single piece


2. Body type : Short wafer
3. Seat type : Bonded seat
4. End connection : Wafer sandwiched
5. Size range : DN 40  to DN 200
6. Pressure rating : *ASME
Class 150 (max)
7. Operating temperature range : -250 C to 1200
C (depending on MOC)
8. Seat leakage : Tight shut off
9. Operation :
Handlever for sizes from DN 40 to DN 200

Worm gear boxes for sizes from DN 40 to DN 200

Pneumatic / Electric actuator operation-optional
10. Standard Material of Construction
Valve Body : SGI / WCB / CF8M
Valve Disc : SGI / WCB / CF8M
Seat : EPDM / Nitrile
Drive end & non drive end shafts : 17.4 PH

Material Diagrams

Sizes / Dimensions