38
September 2020
Installation, Operation and Maintenance Manual
MAN 571_EAC Rev. 1
Maintenance
Section 5: Maintenance
5.2
Extraordinary Maintenance
In case of need extraordinary maintenance can be performed on the parts of the actuator.
NOTICE
Anyway contact Biffi Italia customer care.
5.2.1
Lubrication of Mechanism
For normal duty the scotch yoke mechanism of the actuator is lubricated "for life". In case
of high load and high and high frequency of operation it may be necessary to periodically
restore the lubrication: it is advisable to apply a generous coating of grease on the contact
surfaces of the yoke and bushings, on the yoke link grooves, on the sliding blocks, on the
guide bar. For this operation is necessary to disassemble the mechanism cover. In larger
actuators the lubrication can be performed through the inspection holes of cover after
removing the plugs.
The following grease is used by Biffi for standard working temperature and suggested
for relubrication:
AGIP MU/EP/2
To be used in standard
temperature conditions:
(-30 °C/+85 °C)
NLGI consistency:
2
Worked penetration:
280 dmm
ASTM Dropping Point:
185 °C
Base oil viscosity at 40 °C: 160 mm²/s
ISO Classification:
L-X-BCHB 2
DIN 51 825:
KP2K - 20
Equivalent to:
ESSO BEACON EP2
BP GREASE LTX2
SHELL ALVANIA GREASE R2
ARAL ARALUB HL2
CHEVRON DURALITH
GREASE EP2
CHEVRON SPHEEROL AP2
TEXACO MULTIFAK EP2
MOBILPLEX 47
PETROMIN GREASE EP2
Table 7.
AEROSHELL GREASE 7 or equivalent
To be used in low
temperature conditions:
(-60 °C/+65 °C)
Color:
Buff
Physical state:
Semi-solid at ambient
temperature
Odour:
Slight
Density:
966 kg/m³ at 15 °C
Flash Point:
>215 °C (COC)
(Based on synthetic oil)
Dropping point:
260 °C (ASTM D-566)
Product code:
001A0065
Infosafe No.:
ACISO GB/eng/C
