KSB STAAL 100 AKD, Руководство по эксплуатации

Страница: 30 / 72

5 Installation at Site
30 of 72
0570.81/22-EN
NOTE
Only use fasteners (e.g. to DIN EN 1515-4) and flange gaskets (e.g. to DIN EN 1514)
made of materials approved for the respective valve size. Always use all flange bolt
holes provided when connecting the valve to the piping. Refer to the type series
booklet for details on flange connections.
NOTE
For the valves to reach the documented Kv values, the flow direction must
correspond to the flow direction arrow.
NOTE
The mating flange faces must be clean and undamaged and the gaskets on the
mating flanges must be properly centred.
NOTE
Use an appropriate tool to evenly tighten the bolts crosswise, applying the
permissible torques.
5.2 Installation position and location
Gate valves For gate valves installed in horizontal pipes a vertical stem position is recommended
(handwheel or actuator on top, see position (a) shown below). Installation with the
stem in an inclined or horizontal position, e.g. as in vertical pipes (positions b, c, g, h),
is permitted. In this case, however, the actuator must be adequately supported at the
site. Avoid any installation positions with the actuator hanging downward (positions
d, e, f – risk of dirt ingress into the packing area via the back seat).
(a)
(b)
(h)
(g)
(c)
(f) (d)
(e)
Fig. 16: Gate valve installation positions
Swing check valves Preferably install swing check valves in horizontal pipes. When installing them in
vertical pipes, make sure that the flow direction is upward. In the unpressurised
condition, the valve disc will then be closed by its own weight.
Line blind valve Line blind valves are mainly used for pressure testing the boiler or a run of piping in
a plant. For this purpose, the line blind valve must be installed in such a way that the
boiler pressure presses blind plate 368 against the body seat. When the shut-off
elements are not fitted, flow may pass through the valve in either direction.
When blind plate 368 is fitted, the protruding parallel pin 562.1 must point upwards.
This ensures that bonnet 139 can only be fitted with pointer 572 positioned
perpendicular to the flow direction. This indicates that the flow passage is closed.