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PAVCL Actuator Size 270
Operation and Maintenance Instructions
TABLE OF CONTENTS:
1. SERVICE CONDITIONS
2. FUNCTION
3. STORAGE
4. MAINTENANCE
5. EXPLODED VIEW
6. DISASSEMBLING
7. ASSEMBLING
8. ADJUSTMENT
9. INSTRUCTIONS FOR CHANGING FAIL CLOCKWISE OR FAIL COUNTERCLOCKWISE OPERATION
10. TORQUE RATINGS, WEIGHTS AND OPERATION VOLUMES
1
Service conditions
•
AIR SUPPLY:
dehumidified or lubricated air (standard). Other non-corrosive gases or fluids are a possible
alternative option, if compatible to the materials of the actuator components (internal parts and lubricant). The maximum
particle size must not exceed 40µm (ISO 8573 Part 1, Class 5). In order to prevent water condensation and/or solidification
(ice, when actuator work below 0°C), the operating medium must have a dew point equal to 20°C or, at least 10°C below the
ambient temperature (ISO 8573 Part 1, Class 3).
WORKING PRESSURE:
minimum 29 PSI (2.5 BAR)
– maximum 116 PSI (8 BAR)
TEMPERATURE:
o
minimum -
20˚C to m 85˚C - standard execution – NBR gaskets
o
minimum -
20˚C to m 150˚C - HIGH temperature execution – FKM (Viton) gaskets
o
minimum -
40˚C to m 85˚C - LOW temperature execution – silicone gaskets
o
Warning: in case of high or low temperature executions, a special grease is used as lubricant and such
conditions may alter the torque generated by the actuator. For further information please refer to PBM.
ROTATION:
half turn, 0˚ – 90˚ adjustable ±5˚ in both end positions (double adjustment).
LUBRICATION:
The actuators are equipped with filled-for-life lubrication for normal service conditions.
OPERATING TIME:
Please refer to the technical documentation. The operating time depends on various
parameters such as air supply pressure, capacity of the air supply installation (size of piping, control equipment),
type of valve and fluid, selected safety factor, temperature, etc.).
For your safety and protection it is important that the following precautions be taken prior to
working on the actuator.
1. Remove from the actuator all dust that may cause sparks; clean periodically to prevent
dusting on the actuator. Do not hit the actuators with metallic objects, as they may give off
sparks.
2. The installation and the maintenance of pneumatic actuators must be assigned to trained
and qualified personnel.
3. The use of the actuators out of the allowed temperature and pressure ranges may cause
damage to the internal and external components.
4. Prior to any installation and maintenance of the actuator, close and disconnect any kind of
power or air supply.
5. Disassembling the spring return type actuators (springs inside) may cause severe injuries.
The maintenance must be assigned to qualified expert personnel in full observance of the
instruction described at paragraph 5, otherwise, the actuator has to be returned to PBM.
