Butterfly Valve PN25

  • Butterfly valve PN25 is engineered to withstand pressures up to 25 bar, making them suitable for applications where elevated pressures are encountered.
  • Rugged construction and durable materials ensure long-term reliability and leak-free operation.
  • Can be customized for specific applications, providing flexibility in fluid control systems.
  • Quarter-turn operation and streamlined design minimize pressure drop across the valve.

Product Description

Understanding PN25 Rating

The term “PN25” in a butterfly valve refers to its pressure rating according to the Pressure Nominal (PN) system, which is widely used in Europe and internationally. In this context, “PN25” indicates that the valve is designed to withstand a maximum working pressure of 25 bar (approximately 362.57 psi). This rating ensures the valve’s structural integrity and sealing performance under demanding conditions, making it suitable for applications involving high-pressure fluid systems.

Working Principles

The working principle of a butterfly valve PN25 is based on the rotation of the disc within the fluid stream. When the actuator turns the stem, the disc rotates perpendicular to the flow:

  • Open position: The disc is rotated parallel to the flow, allowing fluid to pass with minimal resistance. The valve offers low pressure drop and relatively high flow capacity compared to other types of valves.
  • Closed position: The disc is rotated to be perpendicular to the flow, pressing against the seat and creating a tight seal, thus stopping fluid flow.

Butterfly Valve PN25


1. Water supply and distribution networks: Controlling water flow in pipelines, pumping stations, and treatment plants.
2. Chemical and petrochemical industries: Handling aggressive media, high-temperature fluids, or slurries in process lines.
3. Power generation: Regulating steam, cooling water, and other fluids in power plants.
4. Pulp and paper industry: Controlling pulp suspensions, chemicals, and process water.
5. Wastewater treatment: Managing flows in collection systems, treatment plants, and effluent discharge lines.

How to maintain butterfly valve pn25?

1. Regular inspections: Schedule periodic visual inspections and functional tests to detect any signs of wear, damage, or leaks.
2. Cleaning and lubrication: Keep the valve and its components clean, and apply recommended lubricants to moving parts as per the manufacturer’s instructions.
3. Seal replacement: Monitor the condition of seals and seats, replacing them when signs of degradation or leakage occur.
4. Actuator maintenance: Follow the manufacturer’s recommendations for maintaining and testing the actuator, including torque calibration, air filter changes, and lubrication.