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Specifications subject to change without notice
Edition: August 2017
Maintenance EB 31a-01_EN
•
Do not operate the actuator outside the temperature
limits: this could damage internal and external
components (disassembly of single-acting actuators may
be dangerous).
•
Do not operate the actuator outside the pressure limits:
this could damage internal parts as well as cause damage
to the housing and end caps.
•
Do not use the actuator in corrosive environments with
insufficient protection: this could damage internal and
external parts.
•
Do not disassemble individual spring cartridges; this may
result in personal injury. If maintenance to springs is
necessary, send them to Pfeiffer.
•
Close and disconnect all air supply lines and make sure
that pneumatic connections are vented during
maintenance and when mounting the actuator onto the
valve.
•
Do not disassemble the actuator or remove the end caps
while the actuator is pressurized.
•
The actuators are designed to be used only on valves.
•
Before mounting the actuator onto the valve, make sure
that the direction of rotation and the position indicator are
in the correct position.
•
If the actuator is incorporated into a system or must be
used in safety devices or circuits, the operator must
ensure that the national and local safety laws and
regulations are observed.
4.3
Operating media:
Dry or lubricated air or inert gases, provided that they are
compatible with the actuator’s internal parts and lubricant
used.
Note:
The operating media must have a dew point
equal to -20 C (-4°F) or at least 10°C below the
ambient temperature. The maximum particle size
contained into the operating media must not
exceed 30 μm.
4.4
Supply pressure:
The maximum supply pressure is 10 bar (145 psi).
For double-acting and single-acting actuators, the operating
pressure range is 2.5 bar (36 psi) to 10 bar (145 psi).
4.5
Operating temperatures:
•
Standard actuator:
from -40°C (-40°F) to +80°C (+176°F).
•
Low-temperature version SLT
with silicone O-rings:
from -55°C (-67°F) to +80°C (+176°F).
•
High-temperature version HT
with FPM O-rings:
from -15°C (+5°F) to +150°C (+300°F).
Note:
For operation at low and high temperatures,
special lubricant is required. Please contact
Pfeiffer. A low or high temperature can slightly
influence the torque of the actuator.
4.6
Response time:
Refer to the corresponding data sheets for the response
times.
Note:
The response time depends on several
factors, e.g. supply pressure, supply capacity of
the operating medium (pipe diameter, flow
capacity of pneumatic accessories), valve type, valve torque
and characteristics, applied safety factor, operating frequency
and temperature etc.).
4.7
Rotation and travel limitation:
Refer to the data sheet for the travel of the rack-and-pinion
actuators:
Standard actuator:
90° rotating angle, with end stop
setting at 0° and 90°, +5/–15°
adjustable
120° actuator:
120° rotating angle with end stop
setting at 0° and 120°, +5/–15°
adjustable
180° actuator:
180° rotating angle with end stop
setting at 0° and 180°, +5/–15°
adjustable
4.8
Lubrication:
The actuators are delivered ready lubricated for the service
life of the actuator under normal operating conditions. The
standard lubricant is approved for the temperature range from
-40°C (-40°F) to +80 C (+176°F).
For low (SLT) and high (HT) temperatures, a special lubricant
is required. Contact Pfeiffer in this case.
Manufacturer
Lubricant
Tennex
TS 2066/2
Table 1 - Lubricant recommendation
4.9
Coating and corrosion protection:
All actuators are protected against corrosion under normal
weather conditions. The different types of coating are
described in the data sheet
Note:
Before mounting the actuator in a corrosive
environment, make sure that the correct type of
corrosion protection has been chosen.
