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Dual Plate Check Valve Manufacturer in Italy – Valvesonly Europe
Valvesonly Europe is a Dual Plate Check Valve Manufacturer in Italy that designs and produces compact, efficient, and durable valves to prevent backflow in piping systems with minimal pressure loss. Manufactured in Italy in accordance with API 594, API 6D, ASME B16.34, and EN 12334 standards, our valves are certified under PED 2014/68/EU and built for reliable performance in high-pressure and high-temperature service conditions.
Function & Working
A dual plate check valve, also known as a double-door check valve, consists of two spring-loaded plates mounted on a central hinge pin. When the medium flows in the forward direction, the plates open fully to allow flow. As soon as reverse flow begins, the torsion spring forces the plates to close instantly, preventing backflow. This quick-closing action minimizes water hammer and system vibration, ensuring safe and efficient fluid transport.
Advantages
Compact wafer design suitable for space-limited installations
Low pressure drop and high flow efficiency
Fast closing mechanism reduces water hammer
Lightweight and easy to install between flanges
Applicable for both horizontal and vertical pipelines
Minimal maintenance with long service life
Types of Dual Plate Check Valves Manufactured
Wafer Type Dual Plate Check Valve
Lug Type Dual Plate Check Valve
Flanged End Dual Plate Check Valve
Cryogenic Dual Plate Check Valve
High Pressure Dual Plate Check Valve
Industries Served
Oil and Gas Pipelines
Petrochemical and Chemical Processing
Power Generation and Boiler Systems
Water Treatment and Distribution Networks
Marine and Offshore Installations
HVAC and Fire Protection Systems
Materials (Body, Disc, and Trim)
| Component | Material | Standard / Grade | Typical Application |
|---|---|---|---|
| Body | Carbon Steel | ASTM A216 WCB / WCC | General industrial, hydrocarbon, and power service |
| Body | Low Temperature Carbon Steel | ASTM A352 LCB / LCC | Cryogenic and sub-zero applications |
| Body | Forged Carbon Steel | ASTM A105 / A105N | High-pressure lines and utility service |
| Body | Forged Low Temperature Steel | ASTM A350 LF2 | Low-temperature and LNG applications |
| Body | Stainless Steel | CF8, CF8M, CF3, CF3M (ASTM A351) | Corrosive and chemical media |
| Body | Duplex and Super Duplex | ASTM A890 F51 / F53 / F55 | Offshore, seawater, and high-chloride environments |
| Body | Alloy Steel | ASTM A217 WC6 / WC9 / F11 / F22 | High-temperature and steam service |
| Body | Aluminium Bronze | C95400 / C95800 | Marine, desalination, and seawater service |
| Body | Exotic Alloys | Alloy 20, Hastelloy, Inconel | Acidic and chemical process systems |
| Disc | Stainless Steel / Duplex / Aluminium Bronze | A351 CF8M / A890 F51 / C95800 | Corrosion and erosion resistance |
| Spring | Inconel X-750 / SS316 | ASTM A313 | High-temperature and corrosive service |
Technical Specifications
Design Standards: API 594, API 6D, ASME B16.34, EN 12334, PED 2014/68/EU
Testing Standards: API 598, EN 12266-1 (Leakage and Pressure Tests)
Size Range: DN15 – DN2000 (½″ – 80″)
Pressure Ratings: PN10 – PN450 / Class 150 – 2500
End Connections: Wafer, Lug, Flanged, Butt Weld (BW), Socket Weld (SW), Threaded (NPT)
Temperature Range: –46 °C to +600 °C (depending on material)
Installation Orientation: Horizontal or vertical flow direction
Operation: Self-acting, non-return
Special Features
Dual spring-loaded plates for rapid closure
Compact wafer design for easy installation
Replaceable seat rings for long-term maintenance
Low head loss and smooth disc movement
Fire-safe and corrosion-resistant construction
Available with soft or metal seat options
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