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Description
L&T CI Butterfly Valves are quarter-turn flow control valves designed for isolation and throttling applications in water, air, and utility services. These valves are compact, lightweight, and cost-effective, making them ideal for HVAC, water supply, fire-fighting, and industrial systems.
Design Standards
- Design & Manufacture: API 609 / BS 5155 / EN 593
- Face-to-Face: ISO 5752 / API 609
- Testing & Inspection: API 598 / ISO 5208
Type of Valve
- Wafer Type (most common)
- Lug Type (optional)
- Double Flanged (on request)
Material of Construction (MOC)
- Body: Cast Iron (CI)
- Disc: Stainless Steel (SS 304 / SS 316) or DI epoxy coated
- Stem: SS 410 / SS 304
- Seat/Liner:
- EPDM
- NBR
- Viton (optional)
- PTFE (optional for chemical service)
Pressure Ratings
- PN 10 / PN 16 / PN 20 / PN 25
- Suitable for low to medium pressure applications
Size Range
- Typically 50 mm (2”) to 900 mm (36”)
- Common market range: 2” to 24”
Temperature Range
- –10°C to +120°C (EPDM/NBR seat)
- Up to +200°C (with special seat material like PTFE)
End Connections
- Wafer Type: Installed between flanges (compact design)
- Lug Type: Allows end-of-line service
- Flanged: For heavy-duty applications
Operation Types
- Lever Operated (manual)
- Gear Operated (for larger sizes)
- Pneumatic Actuator
- Electric Actuator
Key Features
- Compact and lightweight design
- Quick 90° operation
- Bubble-tight shutoff (soft seated)
- Low torque requirement
- Easy installation and maintenance
- Corrosion-resistant lining options
- Long service life with reliable sealing
Advantages
✔ Cost-effective compared to gate/globe valves
✔ Space-saving design
✔ Suitable for large diameter pipelines
✔ Quick opening and closing
✔ Versatile for isolation and throttling
Applications
- Water supply & distribution
- HVAC systems
- Fire-fighting lines
- Irrigation systems
- Sewage & wastewater treatment
- Industrial utility pipelines
- Air and gas service
Summary
L&T CI Butterfly Valves are widely used for general-purpose flow control due to their simple design, low cost, and reliable performance. They are best suited for low to medium pressure systems, especially in water and utility applications.