A UPVC (Unplasticized Polyvinyl Chloride) true union ball valve with an ISO 5211 mounting pad is a specific type of valve engineered for efficient and reliable fluid control in diverse applications, especially where corrosion resistance is crucial. 

Here's a breakdown of its key features:

• Material: The valve's body and internal components are constructed from UPVC, a durable and chemically resistant thermoplastic. This offers a significant advantage over metal valves in corrosive environments, preventing rust and degradation from exposure to water, chemicals, or saltwater.
• True Union Design: The "true union" feature allows for easy installation, disassembly, and maintenance of the valve without the need to cut the pipeline. It comprises two halves connected by a union nut, facilitating convenient access for inspection or replacement of internal parts.
• Ball Valve Mechanism: The valve utilizes a hollow, perforated ball that rotates to control fluid flow. A quarter-turn of the handle aligns the ball's opening with the flow path (open position) or positions it to block the flow (closed position). This design minimizes turbulence and pressure drop, promoting efficient fluid flow.
• ISO 5211 Mounting Pad: This integral feature allows for direct mounting of actuators (electric, pneumatic, or manual gearboxes) to the valve without requiring additional brackets or adapters. This simplifies and streamlines the process of automating valve operation, providing flexibility in choosing actuation mechanisms from various manufacturers due to the standardized interface.
• Applications: These valves are commonly used in:
  • Water treatment plants and swimming pools due to their resistance to chlorinated water.
  • Agricultural irrigation systems where they can withstand fertilizers and pesticides.
  • Chemical processing and manufacturing where exposure to corrosive substances is prevalent.
  • Residential and industrial plumbing systems for general fluid control.
  • Food and beverage industries, ensuring hygiene and safety in handling various liquids. 

Benefits

• Corrosion Resistance: UPVC material prevents rust and degradation, ensuring longevity and reliability in harsh environments.
• Ease of Installation & Maintenance: True union design and lightweight construction simplify installation and allow for quick and easy maintenance, reducing labor and downtime.
• Chemical Compatibility: Resistance to a wide range of chemicals makes it suitable for diverse industrial applications.
• Cost-Effectiveness: UPVC valves are generally more affordable than their metal counterparts, offering a good balance of performance and price.
• Smooth & Reliable Operation: The quarter-turn mechanism provides quick and precise flow control with minimal friction loss. 

In conclusion, UPVC true union ball valves with ISO 5211 mounting pads represent a reliable and versatile solution for various fluid control applications, particularly where corrosion resistance, ease of maintenance, and compatibility with automation systems are key considerations.