WEKA_IOM_C-0068_TgxV_DN250_PN6_EN / 17.04.2020
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6.2
General information
To install the valve into the pipeline or into the vacuum box, it is not necessary to completely disassemble
the valve if the following conditions can be met:
Welding of the thread part
The temperature on the welding flange during welding must be kept as low as possible. Between valve
housing and the insert are two static o-ring seals. The welding flange should always be cooled with a damp
cloth.
Welding of the pipe connections
The temperature on the connection pipes during welding must be kept as low as possible. The seat seal can
be destroyed by excessive heat. The connection and the valve body should always be cooled with a damp
cloth.
During the welding the valve should be flushed so that the heat is always conducted out of the valve (heat
does not pass through the seat area)
If this cannot be guaranteed, we recommend disassembling the actuator and valve inserts according to
chapter 6.6.2 Disassembly of a TgxV DN250/PN6 valve. It must be ensured that insert and actuator are
stored packed in a dry and dust-free place.
6.3
Installation position
The valves must be installed in vertical position with the actuator on top. A deviation from the vertical axis is
generally possible up to an angle of 1 degree. Larger deviations are only permitted with the agreement of
WEKA AG. Special fixing devices must be installed for this.
The valve housings must be installed into the pipeline possibly free of tension. Excessive transverse
stresses caused by the pipeline may negatively affect the function of the valve. Any bending or shearing
stresses during or after welding should be avoided.
