6
2 BW 70 en
Advise caution when installing flaps with safety posi-
tion “spring-to-open”.
If the disc accommodates the total length of the valve, the
disc shall be closed prior to the installation (pneumatic,
hydraulic, etc.). Be sure that the energy supply is safely fas-
tened and cannot be damaged or break off during installa-
tion.
If there is a sudden shutdown of energy supply, the valve
will be opened abruptly by the pre-stressed spring pack-
age. This may cause severe personal injury and material
damage.
Heavy valves to be mounted in a pipeline need a hoist. The
total weight of the valve package can be found in the order
related documentation.
Place the lifting ropes securely around the valve body –
not on the actuator. Otherwise, you may damage the
valve (see Figures 1 and 2).
3.3
Installation
To install the high performance disc valve, proceed in the
following way:
□
If no indication of the valve installation direction is
given, install the valve to have the shaft side on the
upstream side.
□
If the mounting direction is mentioned, bring the valve
in a position so that the arrow (P=pressure) follows the
process pressure direction. (see Figure 6)
Fig. 6
Mounting direction
□
Close the valve for installation. In the open position, the
disc-sealing surface can accommodate the total length
of the valve body and may be damaged at installation.
□
Please note the minimum piping inside diameter
according to ASME B36.10M, ASME B36.19M respec-
tively DIN EN 10305-2 and DIN EN 10305-5.
□
Insert a flange gasket on both sides of the valve
between the valve body and pipeline flange. Gaskets
are not included to the standard delivery.
□
Piping bolt dimensions and quantities can be found in
Fig. 7 and Tables 1-3.
□
Screw the stud bolts opposite to each other as well as
the bolts, flange screws and hex nuts crosswise and
equal with a torque key, in accordance with the parame-
ter of the operator (see Figure 8).
□
Connect the energy supply as the final procedure.
Fig. 7
Stud bolt dimensions
BW 3, BW 4
BW 6
