2 Piece Trunnion Mounted Ball Valve

“aira” Double-Offset Wafer Type Butterfly Valve (Resilient-Seated)

The “aira” Double-Offset Wafer Type Butterfly Valve (resilient-seated) is available with short or long face-to-face lengths, making it ideal for a wide range of flow control applications. It offers long service life due to a wear-resistant, corrosion-proof, and infiltration-proof seat with weld overlay. The media does not come into contact with the bearing, which minimizes wear. Suitable for use in water distribution, water treatment, pre-treated wastewater, dams, power plants, industry, and pressure management.

Specifications & Standards

Design & Manufacturer: API 609 CATEGORY "B" / MSS SP-68 / BS EN-593
Valve Face-To-Face Dimension: API 609 CATEGORY "B" / ISO 5752 / MSS SP-68 / BS EN-558
Flange Standard Conformity: ASME / ANSI B16.5 Class 150, ASME / ANSI B16.47 Series "A & B" Class 150, DIN 1092-1
Inspection & Testing: API 598, BS EN 12266-1, AWWA C504, AWWA C516, IS 13095
Pressure-Temperature Rating: ASME B16.34
Top Flange Drilling: Bolt Hole ISO 5211
Stem Dimension: Square Drive to ISO 5211
Seat Leakage Class: Class VI as per ANSI B16.104 / FCI-70-2 / ISO 5208
End Connection: Wafer Type – D/F – AWWA C504, D/F – IS 13095 – 150#, 300#, 600#, PN-10, PN-16, PN-20, PN-25
Certification: CE Approved, SIL3 Approved, Fire Safe Design Approved
Size Range: 2.1/2" to 48" (65MM to 1200MM)
Temperature Range: NBR -10°C to +90°C, EPDM -20°C to +120°C, VITON 0°C to +220°C, PTFE -25°C to +180°C
Pressure Class: 150#, 300#, 600#, PN-10, PN-16, PN-20, PN-25
Media: Water, Oil, Steam, Air, Gas, Chemical & Vacuum
Leakage Class: Class VI as per ANSI B16.104
Body Material: Cast Iron, Ductile Iron, S.G Iron, WCB, CF8, CF8M, CA15, WCC, LCB, WC6, WC9, WC12, Hastelloy C, Nickel Aluminium Bronze, Duplex 4A, 5A, 6D, Super Duplex, Alloy 20
Disc Material: Cast Iron, Ductile Iron, S.G Iron, WCB, CF8, CF8M, CA15, WCC, LCB, WC6, WC9, WC12, Hastelloy C, Nickel Aluminium Bronze, Duplex 4A, 5A, 6D, Super Duplex, Alloy 20
Seat Material: EPDM / NBR / VITON
Design Standard: API 609, IS 13095, BS EN 593, AWWA C504, AWWA C516
Flange Drilling: ASME B16.5 / B16.47 Class 150

Key Features & Benefits

Double Offset Design: Enhances sealing and reduces seat wear for longer service life.
Disc Configuration: Optimized for low friction and torque, improving operational efficiency.
Wafer Style: Compact, lightweight design for easy installation and space savings.
Durable Construction: Built from high-grade materials to resist pressure and harsh environments.
Versatile Use: Ideal for water treatment, HVAC, chemical processes, and other industrial systems.