4 2 BAR 70 en
1.4 Scope of delivery
The on/off (butterfly) valve is delivered in one of three pos-
sible designs, namely the flange, sandwich or monoflange
version.
The on/off (butterfly) valve is delivered completely along
with the drive.
1.5 Visual inspection
Prior to leaving Mapag factory, the on/off (butterfly) valve
has been checked by our quality assurance department for
seal-tightness and function and set for operation according
to the job-related documents.
Please test the on/off (butterfly) valve for possible shipping
damage prior to installation. Should parts of the delivery
show damage, please report this immediately to our quali-
fied personnel.
Check the on/off (butterfly) valve for its function before
installation. Please proceed as follows:
□ Depending on the size and weight of the on/off (butter-
fly) valve, you will require a hoisting rope.
Figure 1
Figure 2
□ Visual inspection – are all screws properly tightened?
□ Visual inspection for damage to the following compo-
nents
□ Disc
□ Drive shaft
□ Actuator and instrumentation
□ Piping and tubings
□ Gland packings
□ Sealing element
□ Sealing surfaces of the valve
□ Place the on/off (butterfly) valve in a vertical position.
□ Connect the power supply now. Reassure yourself that
the actuator opens into the correct direction of flow.
□ Test the function of the on/off (butterfly) valve. Allow
the on/off (butterfly) valve to open and close many
times. The stop of the drive ensures that the on/off disc
cannot be turned beyond the factory-set closed posi-
tion.
□ Disconnect the energy supply after the functional test.
If the on/off (butterfly) valve does not work flawlessly in the
functional test, please contact our qualified personnel.
Indications for this may be:
□ The valve does not move, moves too slowly or not uni-
formly
□ Unusual running noise can be heard
□ The disc does not move completely into the seated posi-
tion
□ The disc does not open completely
1.6 Marking and identification
Figure 3 Identification plate
In horizontal transport position, always secure the
round sling to the body (see figure 1).
The shaft may be damaged if you secure the slings to
the actuator.
Caution: Twisting hazard!
In vertical transport position, secure the round sling
to the actuator (see Figure 2)
The on/off (butterfly) valve may show uncontrolled
movements during the functional test. Therefore,
ensure that the on/off (butterfly) valve does not
move or tip over during the
functional test under any circumstances.
The following applies in general:
For top view of the drive shaft of the valve:
Left-handed rotation = opening, right-handed
rotation = closing (see Figure 4).
(where appropriate, change according to
job-related specification)
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