Pump Lubricants - Flowserve Durco Mark 3 Installation, Operation & Maintenance Manual

5.2 Pump lubricants

5.2.1 Recommended oil lubricants
Oil
Viscosity cSt
@ 40 ºC
Oil temperature range *
Designation to ISO 3448
and DIN51524 part 2
BP Castrol
ELF/Total
LSC (for oil mist) **
ExxonMobil
†
Q8
†
Shell
Chevron Texaco
Wintershall (BASF Group)
Fuchs
* 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 greater viscosity index than the minimum acceptable of 95 which may
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. The LSC LSO oils are recommended for
oil mist applications. We recommend using Royal Purple SYNFILM in one of the above ISO VG designations if synthetic oil is
required for splash bath lubrication to avoid changing to Viton seals in the bearing housing. It is available in the EU from Renox
S.N.C., Via Bologna 12, 60019 Senigallia (ANOCONA), Italy.
5.2.2 Bearing sizes and capacities
Grease lubricated
Frame
medium duty bearings
size
Pump end
1 6207 Z C3
2 6309 Z C3
3 6311 Z C3
4 6313 Z C3
* Nilos ring fitted into bearing locknut [3712.2]
Oil lubricated
Frame
medium duty bearings
size
Pump end Drive end
1 6207 C3 3306 C3
2 6309 C3 3309 C3
3 6311 C3 3311 C3
4 6313 C3 3313 C3
Note: the bearing sizes do not constitute a purchasing specification.
* Sump volume only, does not include the oil in the constant level oiler.
5.2.3 Recommended grease lubricants
NLGI grade 2 is generally advised for horizontal bearing
housings and NLGI 3 where the bearing housing is
used vertically. The bearings are pre-greased. The
NLGI 2 grade fitted in the factory with grease nipples is
Mobil Polyrex EM grease which has a Polyurea soap
incorporating a mineral oil. NLGI 3 grade is
recommended for vertical applications, if vertical
orientation was specified with order, then the NLGI 3
grease fitted in the factory for vertical application is
Page 22 of 52
DURCO MARK 3 ISO FRAME MOUNTED ENGLISH 85392719 06-12
Splash / force feed / purge oil mist/ pure oil mist lubrication
32
-5 to 65 ºC
(23 to 149 ºF)
ISO VG 32
32 HLP
†
Energol HLP-HM 32
ELFOLNA DS 32
†
Azolla ZS 32
LSO 32 (Synthetic oil)
Mobil DTE 24
†
Mobil DTE Light
Q8 Haydn 32
Shell Tellus 32
†
Rando HDZ 32
†
Wiolan HS32
†
Renolin B 10
Grease lubricated
heavy duty bearings
Drive end Pump end
3306 Z C3 6207 Z C3
3309 Z C3 6309 Z C3
3311 Z C3 6311 Z C3
3313 Z C3 6313 Z C3
Oil lubricated
heavy duty bearings
Pump end Drive end
6207 C3 7306 back-to-back
6309 C3 7309 back-to-back
6311 C3 7311 back-to-back
6313 C3 7313 back-to-back
46
-5 to 78 ºC
(23 to 172 ºF)
ISO VG 46
46 HLP
Energol HLP-HM 46
ELFOLNA DS 46
Azolla ZS 46
LSO 46 (Synthetic oil)
Mobil DTE 25
Mobil DTE Medium
Q8 Haydn 46
Shell Tellus 46
Rando HDZ 46
Wiolan HS46
Renolin B 15
Grease lubricated bearing capacities
Drive end *
7306 pair back-to-back
7309 pair back-to-back
7311 pair back-to-back
7313 pair back-to-back
Oil lubricated optional
heavy duty bearings
Pump end
NUP 207 C3 7306 back-to-back
NUP 309 C3 7309 back-to-back
NUP 311 C3 7311 back-to-back
NUP 313 C3 7313 back-to-back
Mobil Polyrex EM103 grease or equivalent which has a
Polyurea soap incorporating a mineral oil. These
greases are suitable for high bearing and ambient
temperatures and ambient down to at least -20 ° C.
Below this ambient, specialist greases may be required
and Shell Aeroshell 22 is normally required for the
minimum ambient down to nitrile limitation of -45 °C.
Different types or grades of greases
must never be mixed.
68
-5 to 80 ºC
(23 to 176 ºF)
ISO VG 68
68 HLP
Energol HLP-HM 68
ELFOLNA DS 68
Azolla ZS 68
LSO 68 (Synthetic oil)
Mobil DTE 26
Mobil DTE Heavy Medium
Q8 Haydn 68
Shell Tellus 68
Rando HDZ 68
Wiolan HS68
Renolin B 20
g (oz.)
Pump end Drive end
6 (0.2.) 14 (0.5)
13 (0.5) 25 (0.9)
18 (0.6) 35 (1.2)
20 (0.7) 46 (1.6)
Frame oil capacity
(approx.)*
litre (fl.oz)
Drive end
0.5 (17)
1.0 (34)
0.8 (27)
1.6 (54)
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