3-Piece Flanged Ball Valve – Top Flanged
The 3-piece flanged ball valve – top flanged, is designed to control the flow of liquids and gases. Its body is manufactured from three main parts, making maintenance and cleaning easier. Additionally, the flanged connection allows for a secure installation onto the pipeline.
The perforated ball at the center of the valve rotates to start or stop the flow. This movement is typically operated via an actuator or a manual lever. The top flange provides a standard platform for actuator installation, facilitating easy integration.
Thanks to its durable construction, it delivers long-lasting performance even under high pressure and temperature. These features make it possible to safely carry out industrial processes.
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This valve model is widely used across various industrial and commercial sectors. It is especially preferred in process lines requiring high durability. It is safely employed in fields such as the chemical industry, petrochemicals, energy production, treatment plants, and the food industry.
It is also preferred in steam, gas, and liquid transfer systems to meet tight sealing requirements. Its easily removable design reduces maintenance time and minimizes system downtime.
Thanks to its top-flanged design, it can be integrated with actuated systems and operate compatibly with automation systems. This has expanded its use in remotely controlled flow control applications.
How is the Working Principle?
The ball inside the ball valve controls the flow by rotating along a horizontal axis. When the hole in the ball aligns with the pipeline, flow is allowed. When the hole is turned perpendicular, the flow is completely stopped.
This rotational movement can be performed using a manual lever or a motorized actuator. The top flange section allows for the direct installation of such motors or pneumatic-electric actuators.
Thanks to its three-piece body design, the ball and seals can be replaced without removing the valve from the pipeline. This saves time for the user and reduces costs.
What Are the Technical Specifications?
The technical specifications of 3-piece flanged ball valves are listed below:
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Body Material: AISI 304 / 316 Stainless Steel
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Ball and Stem: Chrome-plated stainless steel
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Seal: PTFE (Teflon) or RPTFE
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Connection Type: Flanged – ISO PN16 / PN40
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Temperature Range: -20°C to +200°C
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Pressure Rating: Maximum 40 bar
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Mounting: Actuator Connection with ISO 5211 Top Flange
Additionally, the internal components of the valve are reinforced with special treatments against corrosion and wear, ensuring long-lasting and safe operation.
Why Should It Be Preferred?
The three-piece body design allows for easy maintenance and part replacement. Additionally, the flanged connection provides a strong, leak-proof seal with the pipelines. The stainless steel body offers excellent resistance to aggressive chemicals and high temperatures.
The top flange allows for easy integration with automation systems, enhancing process efficiency. Its long service life, low maintenance requirements, and high performance contribute to overall system safety.
For More Information
Detailed product information can be accessed on the official Unox website. Additionally, other products in the valve category can also be explored.

3-Piece Flanged Ball Valve – Top Flanged
