8
GAV 54F
Responsibility for positioning and installing the valves always lies with the engineering
company, construction company or operator/user. Planning and installation errors may
impair the reliable function of the valves and pose a substantial safety hazard.
For this reason it is particularly important to observe the following:
Attention
The piping must be laid such that detrimental thrust and torsional forces are kept away
from the valve body during installation and operation to avoid both leakage and damage to
the body.
The caps on the connection ports, if any, shall be removed immediately prior to installation.
The mating flange faces must be clean and undamaged .
Danger
The gaskets on the flange faces must be properly centered.
Only fasteners (for ex. to DIN EN 55-) and flange gaskets (for ex. to DIN EN 54)
made of materials suitable for the respective valve size may be used.
For the flange connection between valve and pipe use all flange bolt holes provided.
Attention
When using steel flanges to DIN EN 09- in conjunction with cast iron valves with
flanges machined to DIN EN 09-, make sure that for nominal diameter
DN 65 the mating flanges are fitted offset by .5° to prevent an oblique position of the
valve.
This procedure is required by the difference in the number of bolt holes: DIN EN 09-
specifies 8 holes for steel, whereas DIN EN 09- specifies only 4 holes for cast iron.
DN 65 (steel / steel):
DIN EN 09- with DIN EN 09-,
Bolts through 8 holes
DN 65 (steel / cast iron):
DIN EN 09- with DIN EN 09-,
Bolt hole circle to DIN EN 09- turned
through .5°, bolts through 4 holes,
4 holes free
Installation
Fig. 2
