3-4
EB 31a_EN
December 2022 edition
Subject to technical changes
Design and principle of operation
3.10 Operating temperature
−
Standard actuator:
from -40°C (-40°F) to +80°C (+176°F).
−
Low temperature actuator SLT with silicon o-rings:
from -55°C (-67°F) to +80°C (+176°F).
−
High temperature actuator HT with FPM o-rings:
from -15°C (+5°F) to +150°C (+300°F).
For low as well as high temperature use, special lubricants are
required. Please contact PFEIFFER. A high or low temperature
can in
fl
uence the service life of the actuator.
3.11 Lubrication
The actuators are delivered lubricated for the service life of the
actuator. The standard lubricant is approved for a temperature
range from -40°C (-40°F) to +80°C (+176°F). For low (SLT) and
high (HT) temperatures, a special lubricant is required. Please
contact PFEIFFER.
For lubricants recommended for the rotary actuators when used
under standard conditions, see Table 15-7 in Chapter “15.1.2
Lubricants”.
3.12 Coating and corrosion protection
All actuators are protected against corrosion under normal
weather conditions. The corrosion resistance of the different types
of coatings is described on the data sheet.
Before mounting the actuator in a corrosive environment, make
sure that the selected type of protection is suitable.
3.13 Response time
The response times can be found on the data sheets for the re-
spective actuator sizes, see
DB 31a-E2010.
The response time depends on several factors, such as supply
pressure,
fl
ow rate of the operating medium (pipe diameter,
fl
ow
capacity of the pneumatic components), valve type, valve torque
and characteristics, applied safety factor, operating frequency
and temperature, etc.
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3.14 Rotary actuator assembly
−
All components are clean and in a perfect condition.
−
For assembly, use the grease recommended by PFEIFFER, see
Table 15-7 in Chapter “15.1.2 Lubricants”.
3.14.1 Shaft assembly
(see Figure 3-3, Figure 3-4, Figure 3-5 and Figure 3-6)
Figure
|
3-6:
Shaft
Ö
Assemble the top and bottom shaft bearing bushings (6 and 7).
Ö
Assemble the top and bottom shaft seals (20 and 21) on the
shaft.
Ö
Grease the outside of the shaft surface at the top and bottom,
see Figure 3-4.
Ö
Guide the shaft (30) partially into the housing (29), see Fig-
ure 3-5.
Figure
|
3-7:
Shaft assembly
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Summary of Contents for EB 31a
Page 6: ...EB 31a_EN December 2022 edition Subject to technical changes Content...
Page 32: ...6 2 EB 31a_EN December 2022 edition Subject to technical changes Start up...
Page 34: ...7 2 EB 31a_EN December 2022 edition Subject to technical changes Operation...
Page 42: ...9 6 EB 31a_EN December 2022 edition Subject to technical changes Servicing...
Page 44: ...10 2 EB 31a_EN December 2022 edition Subject to technical changes Decommissioning...
Page 52: ...13 2 EB 31a_EN December 2022 edition Subject to technical changes Disposal...
Page 54: ...14 2 EB 31a_EN December 2022 edition Subject to technical changes Certificates...
Page 55: ...14 3 EB 31a_EN December 2022 edition Subject to technical changes Certificates...
Page 56: ...14 4 EB 31a_EN December 2022 edition Subject to technical changes Certificates...
Page 67: ...EB 31a_EN December 2022 edition Subject to technical changes...
