BS EN 61221:2004

What is BS EN 61221 - Triaryl phosphate ester turbine control fluids about?

BS EN 61221 is an International Standard that specifies the characteristics of unused triaryl phosphate ester fluids for turbine governor controls and other hydraulic systems in electrical power stations.

Fluids used in this application are classified under the category TCD of ISO 6743-5.

Who is BS EN 61221 - Triaryl phosphate ester turbine control fluids for?

BS EN 61221 on triaryl phosphate ester turbine control fluids is useful for:

• Petroleum industry
• Manufacturers of triaryl phosphate ester turbine control fluids
• Suppliers of triaryl phosphate ester turbine control fluids
• Electrical and hydraulic power stations

Why should you use BS EN 61221 - Triaryl phosphate ester turbine control fluids?

Triaryl phosphate ester turbine control fluids are difficult to ignite and show little tendency to propagate a flame, but cannot be considered non-flammable. Such fluids should only be filled into systems designed for their use and where recommended by the equipment manufacturer. Regular maintenance of these fluids is important.

BS EN 61221 specifies the characteristics of unused triaryl phosphate ester turbine control fluids to meet the specific requirement and suitability of their use.

What’s changed since the last update?

BS EN 61221:2004 supersedes EN 61221:1995. BS EN 61221:2004 includes some technical changes with respect to EN 61221:1995. These include:

• Introduction of new tests to define fire resistance, namely the Manifold Ignition and Wick flame persistence tests
• Flame persistence tests
• Introduction of a pour point requirement
• A change to the Sequence II foaming requirement
• Introduction of a cleanliness requirement