1 – Double Offset Design: Reduces friction and wear, providing enhanced sealing and extended valve life.
2 – Metal Construction: Ensures durability and strength, suitable for high-pressure and high-temperature applications.
3 – Grafoil Laminated Seat: Offers superior resistance to high temperatures and pressures, ensuring a tight, reliable seal.
4 – Double Flanged Construction: Provides secure, stable installation and alignment in piping systems.
5 – Versatile Application: Ideal for demanding environments, including chemical processing, power generation, and industrial systems.
6 – Low Maintenance: Designed for minimal upkeep while delivering consistent, dependable performance.
“Mark & Aira Valves” Offers Double-offset wafer type butterfly valve ( resilient-seated ), available with long or short face – to – face length for use in most common flow control applications. Long service life, as the media does not come into contact with the bearing, and due to the wear – resistant, corrosion and infiltration-proof seat with weld overlay. Suitable for use water distribution, water treatment, pre – treated waste water, dams, power plants, industry and pressure management.
Specification | Details |
---|---|
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 B 16.5 Class 150 ASME / ANSI B 16.47 Series “A” & “B” Class 150 DIN 1092 – 1 |
Inspection & Testing | API 598 / BS EN 12266 – 1 / AWWA C 504 / AWWA C 516 / IS 13095 |
Pressure Temperature Rating | ASME B 16.34 |
Top Flange Drilling | Bolt Hole ISO 5211 |
Stem Dimension | Square Drive To ISO 5211 |
Seat Leakage Class | Class VI As Per ANSI B 16, 16.104 / FCI-70 – 2, ISO – 5208 |
End Connection | Wafer Type – D/F – AWWA C 504 / D/F – IS 13095 – 150#, 300#, 600#, PN-10 PN-16 PN-20 PN-25 |
Certification | Design CE Approved, SIL3 Approved, Fire Safe Design Approved |
Size Range | 2.1/2″ To 48″ (65 MM To 1200 MM) |
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, CA 15, WCC, LCB, WC6, WC9, WC12, HAST ALLOY C, NICKEL ALUMINIUM BRONZE, DUPLEX 4A, 5A, 6D, SUPER DUPLEX, ALLOY 20 |
Disc Material | CAST IRON, DUCTILE IRON, S.G IRON, WCB, CF8, CF8M, CA 15, WCC, LCB, WC6, WC9, WC12, HAST ALLOY C, NICKEL ALUMINIUM BRONZE, DUPLEX 4A, 5A, 6D, SUPER DUPLEX, ALLOY 20 |
Seat Material | EPDM / NBR / VITON |
Design Standard | API 609 / IS : 13095 / BSEN 593 / AWWA C 504 / AWWA C 516 |
Flange Drilling | ASME B16.5 / 16.47 Class 150 |
1 – Double Offset Design: Reduces friction and wear, providing enhanced sealing and extended valve life.
2 – Metal Construction: Ensures durability and strength, suitable for high-pressure and high-temperature applications.
3 – Grafoil Laminated Seat: Offers superior resistance to high temperatures and pressures, ensuring a tight, reliable seal.
4 – Double Flanged Construction: Provides secure, stable installation and alignment in piping systems.
5 – Versatile Application: Ideal for demanding environments, including chemical processing, power generation, and industrial systems.
6 – Low Maintenance: Designed for minimal upkeep while delivering consistent, dependable performance.
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