Mounting and Installation Instructions
User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Page 31 of 62
Mounting and Installation
Instructions
Mounting the actuator on the valve
Keep hands away from the valve flanges
Caution! Do not lift the actuator by the top cover.
Mounting procedure QT50
Mount the QT50 in the following way:
1. Apply multi-purpose corrosion protection grease (kind suited for the
materials) on the valve spindle to ease mounting and avoid corrosion.
2. Make sure that the valve and actuator are placed in the same position
(closed). See figure 13.
3. Lift the actuator onto the valve; align its valve adapter with the valve spindle
and lower the actuator onto the valve flange.
4. Ensure that the spindle and valve mounting holes fit directly to the actuator.
5. In cases where adapters are needed reference is made to table 10, page 29.
6. Check that the actuator is correctly positioned on the valve.
7. If needed, remove the top cover and use the hand wheel to turn the actuator
and align the fastening holes of the valve flanges, see chapter 4.1 Mounting
the actuator on the valve on page 31.
8. Insert the fastening screws and use washers according to specifications. For
screw dimensions see Figure 15: QT50 Valve flange fastening holes on page
32 to verify correct length bolts for your valve. An overview of typical length
are given in table 10, page 29 Adapter plate and screws.
9. Tighten fastening screws to the specified torque, see Table 13: Screw torque
on page 57.
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