IQT3 manual – Section: Mounting the Actuator
13
6. Mounting the Actuator
Refer to Section 11 Weights and
Measures for actuator weight.
6.1 IQT Actuators
The IQT range of actuators are suitable
for part turn applications requiring up to
60 starts per hour.
6.2 IQTM Actuators
The IQTM range of actuators are suitable
for modulating control duty of up to
1200 starts per hour in accordance with
IEC 60034-1 to S4 50%. Commissioning
of IQTM range actuators is identical to
the standard IQT (refer to Sections 7, 8
and 9).
6.3 IQTF Actuators
The IQTF range of actuators are suitable
for part-turn and multi-turn, non-thrust
applications requiring low speed and low
operating turns. Commissioning of IQTF
range actuators is similar to the standard
IQT (refer to Sections 7, 8 and 9).
6.4 Lifting the Actuator
Ensure the valve is secure before fitting
the actuator, as the combination may be
top heavy and therefore unstable.
When lifting the actuator using
mechanical lifting equipment certified
slings should be attached as indicated
in Figure 5. At all times trained and
experienced personnel should ensure
safe lifting, particularly when mounting
actuators.
WARNING: Do not lift the
actuator by the handwheel.
A suitable mounting flange conforming
to ISO 5210 or USA Standard MSS
SP101 must be fitted to the valve.
Actuator to valve fixing must conform
to; Material Specification ISO Class 8.8,
yield strength 628 N/sq mm.
WARNING: Do not lift the
actuator and valve combination via
the actuator. Always lift the valve/
actuator assembly via the valve.
Fig. 6.4.1
WARNING: The actuator should
be fully supported until full valve
stem engagement is achieved and
the actuator is secured to the valve
flange.
Fig. 6.4.2
6.5 Securing Actuator to Valve
Before engagement ensure that the
actuator and valve are in the same
position (i.e. closed) and the drive bush-
machining matches the stem position.
Actuator position can be determined
using the display (refer to section 3.3
page 4) and if necessary can be moved
using the handwheel (refer to section
3.1 page 3). It may be necessary to
adjust the stop bolts to enable sufficient
travel. Refer to section 5.6.
Tighten down onto valve flange to the
required torque, see table B.
Imperial Size
Torque
Nm
lbf.ft
1
/
4
- Hex
6.7
4.9
5
/
16
- Hex
12.6
9.3
3
/
8
- Hex
21.4
15.8
7
/
16
- Hex
33.6
24.8
1
/
2
- Hex
50.8
37.4
9
/
16
- Hex
71.5
52.7
5
/
8
- Hex
99.2
73.2
3
/
4
- Hex
170.8
126.0
7
/
8
- Hex
271.3
200.1
1 - Hex
406.0
299.5
Metric Size
Torque
Nm
lbf.ft
M5 - Hex
3.0
2.2
M6 - Hex
5.4
4.0
M8 - Hex
12.8
9.4
M10 - Hex
25.0
18.4
M12 - Hex
42.9
31.6
M16 - Hex
100.5
74.2
M20 - Hex
198.2
146.2
M24 - Hex
340.3
251.0
Table B
