Instructions for use DOMINO valves
AT 100 / 150 / 200 / 300 / 400/ 600
AT-Betriebsanleitung (GB) (GR) 16.06.2011
3 / 6
3.2
Removal of additional corrosion preventative
Before the final installation of the valves, any corrosion preventative that has been applied as per section 2.2
above must be thoroughly removed. All parts, and in particular the valve plate, spindle and piston rod, must
be free of dust and dirt and, if necessary, well lubricated with a suitable lubricant before being used for the
first time.
Recommended
lubricants:
Shell Alvania R2, Molikote-Longtherm 2 Plus or equivalent.
3.3
Preservation of EKB (epoxy powder coating) and special painting
Damage to the protected surfaces arising during installation or transport must be repaired by an expert.
Damage of this type is not covered by the warranty.
3.4
Protection of the Valve
If there is construction work still going on near or above the valves, they must be covered to protect them
against this construction work.
When painting the installation, the spindle, electrical components and the plate projecting from the housing
when the valve is open must not be painted. Any solvents used to remove unwanted paint must not come
into contact with the seals under any circumstances. This applies especially to the area where the valve plate
projects from the housing. If the installation is to be first cleaned by sand-blasting, the valves must be
covered with special care.
Debris from sand-blasting, and especially sand-blasting grit, which gets into those parts of the installation
that will be in contact with the valve during subsequent operation of the installation, must be removed
carefully. Sand-blasting grit can destroy the valve plates and seals within a very short time.
3.5
Place of installation
The possible locations for installing the valve must be selected such that surfaces A and B are freely
accessible for both sides to allow the seals to be readjusted if necessary.
Ensure that there is the necessary amount of space available for the packing tool C.
3.6
Position of installation
The position of installation of the respective valve must be chosen so that operation will be affected as little
as possible by the medium.
Valves should normally be installed upright in horizontal pipelines, i.e., actuator on top, and horizontally in
vertical pipelines. In the case of technically difficult installation conditions or in the case of custom-made
valves, please contact the manufacturer if there is any doubt regarding the exact position of installation.
3.7
Direction of flow
The direction of flow must be according to the direction of the arrow in custom-made valves.
4. Mounting
4.1
Avoid under all circumstances any tension or stresses in the valve housing caused by piping that has not
been aligned correctly or from piping that is under thermal stress.
4.2 Final
remarks
Valves must always be installed near to supports in order to avoid stresses and tensions caused by bending
elements.
4.3
Valves of the AT 200 series can be installed between flanges or as inlet / outlet valves. If valves of the
AT 100 / AT 150 series are to be used as inlet / outlet valves, we recommend the use of an additional
counterflange (e.g. as per DIN 2642).
