Wafer Type Butterfly Valve
Wafer Type Butterfly Valve is a quarter-turn flow control valve designed for compact installation, tight shut-off, and low torque operation. It is widely used in water, wastewater, textile, HVAC, chemical, and general industrial services.
Description
Wafer Type Butterfly Valve
Resilient Seated Industrial Wafer Butterfly Valves | PN10 / PN16 / PN25 | DN 40β1200
MNC Valves is a Manufacturer of Wafer Type Butterfly Valve in India, manufacturing resilient seated concentric butterfly valves designed for compact installation, reliable shut-off, and cost-efficient industrial flow control.
We specialize in molded seat wafer butterfly valves, while also offering replaceable seat designs for chemical and process applications.
Wafer type butterfly valves are widely used in water treatment plants, HVAC systems, fire protection networks, chemical processing, and industrial utilities where space-saving installation is required.
MANUFACTURING STANDARDS
Manufactured in compliance with:
- API 609 β Butterfly Valves
- EN 593 β Industrial Butterfly Valves
- MSS SP-67 β Resilient Seated Butterfly Valves
- ASME B16.34 β Pressure-Temperature Ratings
- API 598 β Inspection & Testing
Face-to-face dimensions as per:
- EN 558 Series 20
- API 609 (Category A β Where applicable)
Flange drilling compatibility:
- ASME B16.5
- EN 1092-1
- IS 1538
PRODUCT DESIGN OVERVIEW
Wafer type butterfly valves are installed between two pipeline flanges and secured using flange bolts. Design includes:
- Concentric disc arrangement
- Floating resilient seat
- Blow-out proof shaft
- Precision machined disc
- Compact wafer body
This design provides:
- Space-saving installation
- Lightweight configuration
- Economical pipeline solution
- Bi-directional sealing
- Low torque operation
SIZE & PRESSURE RANGE
- Size Range: DN 40 mm to DN 1200 mm
- Pressure Rating: PN10 / PN16 / PN25
- ANSI Class 150 / 300 (Where applicable)
- Temperature: As per seat material limits
Wafer design is suitable for medium pressure industrial pipelines.
MATERIALS OF CONSTRUCTION
| Body Materials | Disc Materials | Seat Materials |
|---|---|---|
| Cast Iron (CI), Ductile Iron (DI), WCB (Carbon Steel), CF8 (SS304), CF8M (SS316) | SG Iron (Nickel Plated), SS304, SS316, Aluminium Bronze, Duplex (On Request) |
Molded Seat (Primary Manufacturing Strength): β’ EPDM β’ NBR β’ Viton Replaceable Seat (Optional Design): β’ EPDM β’ NBR β’ PTFE |
DESIGN FEATURES
- Concentric design
- Bi-directional sealing
- ISO 5211 top mounting pad
- Low operating torque
- Compact face-to-face dimension
- Suitable for automation
- Bubble-tight shut-off within rated pressure
END CONNECTION
- Wafer type installation between flanges
- Compatible with ANSI / DIN / IS drilling patterns
TESTING & QUALITY CONTROL
All wafer butterfly valves are tested as per API 598:
- Hydrostatic shell test
- Seat leakage test
- Operational torque verification
Third-party inspection available upon request.
OPERATING PRINCIPLE β CONCENTRIC WAFER TYPE
The disc rotates 90Β° inside the pipeline.
- 0Β° β Closed
- 90Β° β Fully Open
The resilient elastomer seat ensures bubble-tight sealing and compensates for minor pipeline misalignment.
APPLICATIONS
- Water Treatment Plants
- HVAC Systems
- Fire Fighting Lines
- Cooling Water Systems
- Chemical Utility Lines
- Industrial Infrastructure
WAFER TYPE VS LUG TYPE β ENGINEERING DIFFERENCE
| Feature | Wafer Type | | Lug Type |
|---|---|---|
| Installation | Between flanges | Bolted with threaded lugs |
| Maintenance | Requires full line shutdown | One side removal possible |
| Cost | Economical | Slightly higher | Weight | Lighter | Heavier |
Wafer type is preferred where cost and compactness are key priorities.
AUTOMATION COMPATIBILITY
Available With:
- β’ Pneumatic Actuation
- β’ Electric Actuation
- β’ Manual Lever
- β’ Gear operator
Suitable for automated industrial flow control systems.
