Flowserve Guardian Sealless Metallic - Manual (Page 31)

GUARDIAN USER INSTRUCTIONS ENGLISH 71569212 08-11
Page 31 of 68 flowserve.com
Figure 5-2: Recommended oil lubricants
Oil Splash / force feed / purge oil mist/ pure oil mist lubrication
Viscosity cSt
@ 40 ºC
32 46 68
Oil temperature range *
-5 to 65 ºC
(23 to 149 ºF)
-5 to 78 ºC
(23 to 172 ºF)
-5 to 80 ºC
(23 to 176 ºF)
C
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if
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Designation to ISO 3448
and DIN51524 part 2
ISO VG 32
32 HLP
ISO VG 46
46 HLP
ISO VG 68
68 HLP
BP Castrol † Energol HLP-HM 32 Energol HLP-HM 46 Energol HLP-HM 68
ESSO † NUTO HP 32 NUTO HP 46 NUTO HP 68
ELF/Total †
ELFOLNA DS 32
Azolla ZS 32
ELFOLNA DS 46
Azolla ZS 46
ELFOLNA DS 68
Azolla ZS 68
LSC (for oil mist)** LSO 32 (Synthetic oil) LSO 46 (Synthetic oil) LSO 68 (Synthetic oil)
ExxonMobil † Mobil DTE 24 Mobil DTE 25 Mobil DTE 26
Q8 † Q8 Haydn 32 Q8 Haydn 46 Q8 Haydn 68
Shell † Shell Tellus 32 Shell Tellus 46 Shell Tellus 68
Chevron Texaco † Rando HD 32 Rando HD 46 Rando HD 68
Wintershall (BASF Group) †
Wiolan HS32 Wiolan HS46 Wiolan HS68
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Fuchs † Renolin CL 32 Renolin CL 46 Renolin CL 68
* Note that it normally takes 2 hours for bearing temperature to stabilize and the final temperature will depend on the ambient, r/min, pumpage
temperature and pump size. Also some oils have a very low pour point and good viscosity index which extend the minimum temperature
capability of the oil. Always check the grade capability where the ambient is less than -5 ºC (23 ºF).
† Use LSC for oil mist. Oil parameters provide flash point >166 ºC (331 ºF), density >0.87 @ 15 ºC (59 ºF), pour point of -10 ºC (14 ºF) or lower.
** Normal compounded oils CANNOT be used with oil mist as anti-foam additives need to be avoided. Most oils recommended for wet
splash lubrication contain foam inhibitors as well as antioxidants and anticorrosion additives, so they are unsuitable for oil mist. Some
synthetic lubricants may attack the Nitrile seals used in a regular bearing housing.
Figure 5-3: Oil viscosity grades
Maximum oil
temperature ISO viscosity
grade Minimum
viscosity index
Up to 71 °C (160 °F) 46 95
71-80 °C (160-175 °F) 68 95
80-94 °C (175-200 °F) 100 95
Figure 5-4: Maximum external housing
temperatures
Lubrication Temperature
Oil bath 82 °C (180 °F)
Oil mist 82 °C (180 °F)
Grease 94 °C (200 °F)
The maximum temperature that the
bearing can be exposed to is 105 °C (220 °F).
Figure 5-5: Lubrication intervals *
Lubricant
Under 71 °C
(160 °F)
71-80 °C
(160-175 °F)
80-94 °C
(175-200 °F)
Mineral oil 6 months 3 months 1.5 months
Synthetic oil ** 18 months 18 months 18 months
* Assuming good maintenance and operation practices, and no
contamination.
** May be increased to 36 months with ANSI 3A™ power end.
5.2.2 Grease for life double shielded or double
sealed bearings
These bearings are packed with grease by the
bearing manufacturer and should not be relubricated.
The replacement interval for these bearings is greatly
affected by their operating temperature and speed.
Shielded bearings typically operate cooler.
5.2.3
Oil mist
When optional oil mist lubricated bearings are
specified, the bearing housing is furnished with a
plugged 1/2 in. NPT top inlet for connection to the
user’s oil mist supply system, a vent fitting in the
bearing cover, and a plugged 1/4 in. NPT bottom
drain. See
Oil Mist Lubrication System in Section
4.6.5.5.
Do not allow oil level to remain above the center of
the bearing housing sight glass window with purge
mist (wet sump) systems.
5.3 Impeller clearance
For Guardian G & H series pumps the impeller
clearance is set to the bearing holder at 0.45 mm
(0.018 in.) regardless of operating temperature.
Clearance is set by adding or removing shims located
between the impeller and thrust collar. See Section
6.6 for instructions on how to set the impeller.