GF DIASTAR 025 Manuel D'utilisation page 20

Pneumatic diaphragm valve DIASTAR 025
4.2 Installation process
► Always install the valve in the open position.
DANGER!
Use of hazardous and non-approved medium!
Non-approved chemically aggressive or hot medium can attack materials, cause personal injury and endanger the environment.
Components not in contact with the medium can be attacked by leakage inside the valve.
► Observe the safety data sheets or the applicable safety regulations for the medium used.
► Check the compatibility of the valve materials with the medium.
► Do not use unapproved medium.
► Regularly check the valve for wear and, if necessary, perform service.
► Wear appropriate protective equipment.
► For hot medium: Work only on cooled down system.
► In case of uncertainty regarding approved medium, contact the Georg Fischer Piping Systems Sales Company.
CAUTION!
Thermal expansion forces on piping system!
Preventing thermal expansion during temperature changes results in axial or bending forces. Piping system and valve may be da-
maged.
► Make sure that the forces are absorbed by suitable fixed points before or after the valve.
CAUTION!
Pipe not in aligned!
Risk of injury and/or damage to property due to leakage of the piping system because of stress forces in the piping system.
► Make sure that the valve and pipe are aligned with each other.
4.2.1 Flange connection
For the tightening torques of the screws, refer to the relevant chapters of the Georg Fischer Planning Fundamentals Industry.
CAUTION!
Leaking flange connection!
Danger of injury and/or material damage due to leaks in the piping system.
► Periodic inspection that no medium escapes to the outside.
► If medium is exiting at the flange connections, they have to be retightened.
CAUTION!
Contaminated jointing faces!
Risk of injury from contact with medium due to leaking connections.
► Protect jointing faces and connection parts from damage and poisoning, especially from hard or sharp-edged particles.
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Operating Instructions