10
6.5
Optional accessories
Body support
Caution: Supporting legs must not be fixed to the ground.They must
remain free to move.
-- Assemble separately, the four identical parts as shown hereunder,
with the screws (900), the nuts (920.2) and the washers (554.2).
-- Assemble the body supports onto the valve.
Depending on lifting means, place the valve either in vertical or
horizontal position, sling with lifting and/or supporting means.
Assemble every support onto the valve using connecting rods
(81.51), eye bolts (81--39) + (920.1) and washers (554.1).
920.1
554.1
81--51
81--39
900
191
920.2
554.2
7
Installation
7.1
General
ATTENTION To avoid leakage, deformation or rupture of the body,
the piping should be laid out in such a way that no thrust or bending
forces act on the valve bodies (Part Nr. 100) when they are installed
and operational.
ATTENTION The sealing faces of the flanges must be clean and
undamaged (Ra
25
m).
It is prohibited to add any additional gasket (except electric
insulation gasket, please consult us) between body and piping
flanges. To insert the valve between flanges, pull apart the two pipes
flanges to obtain sufficient clearance between flange face and valve
seat cheeks. All holes provided in the flanges must be used for the
flange connection.
lf construction work is still in progress, non--mounted valves
must be protected against dust, sand and building material etc.(cover
with suitable means).
Do not use valve handles and gear handwheels as footholds!
Valves and pipes used for high (> 60
°
C) or low (< 0
°
C)
temperatures must either be fitted with a protective insulation, or there
must be warning signs fitted showing that it is dangerous to touch
these valves.
lf a valve is used as end-valve in a pipe, this valve should be
protected against unauthorized or unintentional opening to prevent
personal injury or damage to property.
Valves sizes DN
600
may be installed in any position.
Valves sizes DN > 600
have a mountung preferential direction
horizontal shaft following the figure hereafter. This is the most
favourable position because:
--The weight of the disc and shafts is borne by the two bearings,
-- the pivot bearing is relieved,
-- it is a guarantee of long valve life, specially in the case of fluids
containing solids, where sold particles tend to accumultate on the
bottom of the pipe (during the closing, the reduction in cross--section
causes a local increase in velocity which results in a “sweeping” or
“cleaning” of the liner).
The mounting, vertical shaft, actuators ace upwards is allowable.
7.2
Installation conditions
7.2.1
Recommended minimum distances between the
position of the valve and of the T--piece or elbow.
DN
1 DN
DN
DN
1 DN
DN
3 DN
DN
DN
1 DN
1 DN
3 DN
5--6 DN
3 DN
1
3
5
6
4
2
Also valid for valve placed at pump dischange.
