Aira Pneumatics
Aira Pneumatics

Welcome to Aira Pneumatics, your trusted partner in pneumatic solutions and valve systems in India. As an authorized dealer for renowned brands such as Airmax Pneumatics, Aira Valves, Cair, SuzhiK, 4MA, Yukon, and Hydint, we are committed to delivering innovative and high-quality products tailored t... Read more

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Fabricated Double Flanged Damper Valve

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Fabricated Double Flanged Damper Valve

AIRA – FEP / PFA Lined Butterfly Valve (Lug Type)
AIRA offers FEP / PFA Lined Valves specifically designed for highly corrosive applications such as Chlorine, Benzene, Sulphuric Acid, Nitric Acid, Phosphoric Acid, Hydrochloric Acid, and Sea Water. These valves are built using virgin-grade resin and thick fluoropolymer linings to deliver superior resistance to chemical corrosion, absorption, and swelling.

Specifications & Standards
  • Design & Manufacturer: API 609 Category A / BS-EN-593
  • Valve Face To Face Dimension: API 609 Category A
  • Inspection & Testing: API 598 / BS EN 12266 PART - 1
  • Leakage Class: Class VI
  • End Connection: Lug Type
  • Valve Rating: Flanged 150#
  • Spark Test: 15 KV DC to 40 KV DC
  • Body Type: Lug Type
  • Fugitive Emissions: Yes
  • Size Range: 1½'' to 24'' (50MM to 600MM)
  • Temperature Range: -50°C to 300°C for Soft Seated Valves (Contact for special requirements)
  • Pressure Class: PN-6
  • Body Material: Cast Iron (CI), Ductile Iron (DI), S.G. Iron (SGI), WCB, CF8, CF8M, CF3M, SS 304L, Duplex, Hastelloy, Monel
  • Disc Material: CF8, CF8M, WCB + ENP, Hastelloy, Duplex, Monel, CF3M
  • Sleeve Material: PTFE, RPTFE, CFT, GFT, TFM-1600, AIRA-250, Nylon, Devlon, PEEK, FEP
  • Flanged Drilling: ISO 5211 II
  • Shut Off Rating: VI Class
  • Stem Material: CF8, CF8M, WCB + ENP, Hastelloy, Duplex, Monel, CF3M
Features & Benefits
1 – Upper Stem Bushing: Acetal (standard) or PTFE (optional) bushing, retained by a stainless steel ring, absorbs actuator side thrusts.
2 – Upper Stem Seal: Prevents contaminants from entering the stem bore.
3 – Body Construction: Two-piece wafer or lug style, epoxy coated; meets ASME Class 150 / DIN 3840 flange standards (24" is double flanged).
4 – Bearings: PTFE-impregnated steel bearings for precision alignment of upper and lower stem.
5 – Blowout Proof Stem: Machined shoulder creates a positive stem-to-disc connection during assembly.
6 – Primary Seal: Achieved through interference fit between wide disc hubs and contoured seat.
7 – Seat Design: Special seat geometry lowers seating/unseating torque and reduces wear on contact surfaces.

Direct Mounting As Per ISO 5211

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