Supplement to operation instructions SIPOS SEVEN
2SL78 linear thrust unit
Page 6
Y070.518/EN
3 Maintenance
3
Maintenance
2�4 End position setting and test run
End position setting at actuator must be performed, refer to operation instructions SEVEN, chapter
“Commissioning”.
1. Check direction of operation:
a) Operate the linear thrust unit in middle position in manual operation mode.
b)
Briefly operate the actuator in direction OPEN. If the direction of operation is incorrect, imme
-
diately stop and change the direction of operation. For this, refer to the actuator operation
instructions, chapter “Commissioning”.
2. Operate in direction CLOSE in motor operation. Prior to reaching the end position, continue
operation in manual mode until torque rises. Then check, if
– either the position of the valve
or
– the mechanical end stop of linear thrust unit is reached.
If the mechanical end stop of the linear thrust unit is reached prior to the valve reaching the end
position, replace the linear thrust unit selecting a device offering a larger stroke ranges.
3 Maintenance
3�1 General notes
After commissioning, check the linear thrust unit for damage to paint finish. To avoid damage by
corrosion, thoroughly touch up damage to paint finish.
Basically, the linear thrust unit does not require maintenance. However, to ensure continuous avail-
ability, we recommend the following actions:
■
Approximately six months after commissioning and every year after, check bolts of linear thrust
unit to multi-turn actuator and to valve for tightness. If required, fasten screws applying the
appropriate torques corresponding to the tightening class of the screws applied (refer to table in
chapter 2.1).
■
Perform a visual inspection once a year for oil and grease leakage. In case of leakage, replace
linear thrust unit.
■
Perform a detailed functional test of the linear thrust unit every 2 years.
■
Linear thrust unit permanently subjected to temperatures over 40 °C must be serviced in shorter
intervals.
3�2 Seals
Seals made of elastomer are subject to ageing. We recommend to replace the seals of linear thrust
units after 8 years during actuator revision.
3�3 Oil change
We recommend an oil change for linear thrust units after 8 years. In case of frequent operation or
modulating duty, the recommended period is every 4 to 8 years. In case of infrequent operation, the
period is recommended at 10 to 12 years.
■
Exclusively use original oil or an approved equivalent. Indications to oil quantities are indicated
in the table below.
■
We recommend a lubricating oil CLP 220 (DIN 51517 Part 3), e.g. BECHEM Staroil G220 by
CARL BECHEM GmbH.
■
Removed lubricants and used cleaning agents must be disposed of complying with the valid
regulations.
Oil quantities for linear thrust unit
Linear thrust unit
Stroke 100 mm
Stroke 300 mm
2SL781, 2SL782
0.3 l
0.6 l
2SL783
075 l
1.35 l
2SL784, 2SL785
1,1 Liter
2.0 l
Issue 07.20
Y070.518/EN
Subject to changes without notice!
© SIPOS Aktorik GmbH
Im Erlet 2 • 90518 Altdorf/Germany
www.sipos.de