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Wafer Butterfly Valve Manufacturer in Italy – Valvesonly Europe
Valvesonly Europe is a Wafer Butterfly Valve Manufacturer in Italy, offering durable and precision-engineered valves for water distribution, HVAC, fire protection, oil and gas, chemical, and power plant applications. Manufactured in Italy in compliance with EN 593, API 609, and ASME B16.34, our wafer butterfly valves are certified under PED 2014/68/EU. They provide tight shut-off, low operating torque, and compact installation between standard flanges, making them ideal for both industrial and utility service.
Function & Working
A wafer butterfly valve regulates or isolates flow through the rotation of a disc mounted on a central shaft. The disc turns 90° from fully open to fully closed position. When open, it allows near-full-bore flow with minimal pressure loss; when closed, it seals tightly against the resilient or metal seat. The wafer body fits between flanges and is centered with bolts, offering a space-saving solution for pipelines where compactness is essential. Designs are available in concentric, double eccentric, and triple eccentric configurations to meet different process conditions.
Advantages
Compact and lightweight design suitable for tight piping spaces
Quick 90° operation with low torque requirement
Available in concentric, double offset, and triple offset designs
Complies with EN 593, API 609, ASME B16.34, and PED 2014/68/EU
Bubble-tight shut-off with resilient or metal seats
Fire-safe and anti-static construction
Interchangeable top flange per ISO 5211 for actuator mounting
Types of Wafer Butterfly Valves Manufactured
Concentric Wafer Butterfly Valve
Double Eccentric (High Performance) Wafer Butterfly Valve
Triple Eccentric Wafer Butterfly Valve
PTFE Lined Wafer Butterfly Valve
Metal Seated Wafer Butterfly Valve
Gear Operated and Actuated Wafer Butterfly Valve
Industries Served
Water and Wastewater Treatment
HVAC and Fire Protection Systems
Oil and Gas Transmission Lines
Chemical and Petrochemical Processing
Marine and Offshore Installations
Power Generation and Steam Distribution
Materials (Body, Disc, Shaft, and Seat)
| Component | Material | Standard / Grade | Typical Application |
|---|---|---|---|
| Body | Ductile Iron | EN-GJS-400-15 / ASTM A536 | Water, HVAC, and general service |
| Body | Carbon Steel | ASTM A216 WCB | Hydrocarbon, steam, and industrial service |
| Body | Stainless Steel | CF8 / CF8M (SS304 / SS316) | Corrosive and chemical fluids |
| Body | Duplex / Super Duplex | ASTM A890 4A / 5A / 6A | Offshore, seawater, and desalination plants |
| Body | Aluminium Bronze | C95400 / C95800 (ASTM B148) | Marine and brine service |
| Disc | Stainless Steel / Duplex / Aluminium Bronze | A351 CF8M / A890 F51 / C95800 | Strength and corrosion resistance |
| Shaft | SS410 / SS420 / SS431 / SS316 | ASTM A276 | Wear and fatigue resistance |
| Seat | EPDM / NBR / Viton / PTFE / Metal | — | Service-specific sealing options |
| Coating | Fusion Bonded Epoxy (≥250 µm DFT) | AWWA C550 | External corrosion protection |
Technical Specifications
Design Standards: EN 593, API 609, ASME B16.34, PED 2014/68/EU
Testing Standards: EN 12266-1, API 598
Size Range: DN50 – DN2000 (2″ – 80″)
Pressure Ratings: PN10 – PN40 / Class 150 – 300
Temperature Range: –40 °C to +300 °C (depending on material)
End Connection: Wafer Type, suitable for EN 1092 / ASME B16.5 flanges
Operation: Manual (Lever / Gear), Pneumatic, Electric, or Hydraulic Actuator
Seat Options: Resilient (EPDM, NBR, Viton, PTFE) or Metal-to-Metal sealing
Special Features
Fire-safe and anti-static construction
Blow-out proof shaft design
Replaceable seat for easy maintenance
Extended neck for insulated pipelines
ISO 5211 top flange for actuator mounting
High-performance sealing under bi-directional pressure
Precision-machined disc and body to ensure uniform torque
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