INSTALLATION
Page 4 of 12
INSTALLATION AND MAINTENANCE
GP RANGE
Publication F130E
Date of issue 04/08
2.3 Maximum Allowable Temperature
2.3.1 The maximum temperature allowable for standard build actuators is 100°C (212°F).Other maximum temperature build
options are available. It is the responsibility of the user to ensure that the maximum allowable temperature as indicated on the
nameplate is not exceeded and also, in the case of sites where a potentially explosive atmosphere may exist, that the surface
temperature of the actuator does not exceed the ignition point of the potentially explosive atmosphere.
2.3.2 Be aware that the temperature of the contents of the valve/pipeline as well as that of the power supply gas will affect actuator
temperature. A build up of dust or dirt on the actuator can inhibit cooling and contribute to increased surface temperatures.
The user should plan and provide for a periodic cleaning/maintenance program that will maintain the installation environment
per the guidelines set forth in EN 1127-1 par 6.4.2.
2.4 Operating Environment
2.4.1 The user must ensure that the operating environment and any materials surrounding the unit cannot lead to a reduction in the
safe use of, or the protection afforded by the actuator. Where appropriate, the user must ensure the actuator is suitably
protected against its operating environment including, but not limited to, lightning strikes, vibration sources and vehicular
movement.
2.5 Mechanical Considerations
2.5.1 It is recommended that before lifting an actuator onto a valve, great care is taken to ascertain the position of the valve and
orientate the actuator accordingly.
2.5.2 Rotork actuators can be mounted on valves in almost any desired position. It is usual however to align the centerline of the
cylinder to the centerline of the associated pipe work.
Note: Certain accessory and control components e.g., filter drains, hydraulic reservoirs; require proper orientation with
respect to gravity to function properly. Contact Rotork Fluid Systems if in doubt.
2.5.3 Ensure all fasteners are adequately tighten to avoid loosening during the course of operation, taking into account vibration
induced by the dynamics of the pipeline.
2.54 All tubing used to provide pneumatic/hydraulic power to the actuator must be free from contaminants and debris. Ensure
tubing runs are adequately fastened and supported to minimise repetitive stress induced by any vibration induced by the
dynamics of the pipeline.
2.5.5 When the actuator has been bolted to the flange or adapter, the position of the stop bolts should be checked to ensure full
opening and closing of the valve. If these end of travel positions are not correct, the stop bolts may be adjusted by first
loosening the fixing nut and then screwing the bolts in or out until desired end position is obtained. Stroke the yoke away from
the stop bolt when adjusting, then return it to check position. When the correct positioning is obtained, re-tighten the fixing
nut.
2.5.6 Certain valves incorporate their own stops. In these cases it is recommended that the actuator stop bolt positions coincide
with the valve stop positions.
2.5.7 Ensure there are no leaks from any pneumatic or hydraulic connections. Tighten as required.
2.5.8 Once in position, the actuator should operate the valve with a smooth continuous action. If uneven operation occurs, the
pneumatic/hydraulic power supply should be checked for correct pressure and volume flow. Flow may be restricted by
undersize pipe or fittings. These could throttle the flow thus reducing the pressure and volume at the actuator and causing
intermittent motion. Further fault detection procedures are outlined in Section 6.
2.4.2 If the unit has a nameplate indicating that it is suitable for installation in potentially explosive atmosphere (hazardous area), it
must not be installed in a hazardous area that is not compatible with the gas groups and temperature class defined on the
nameplate.
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