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DMX/DMXD/DMXH/DMXDH USER INSTRUCTIONS ENGLISH 85392728 - 10/09

Page 30 of 60

The frequency of oil change depends on the

operating conditions and the quality of the lubricant.

Oil should be checked for deterioration and

contamination weekly during periods of operation.

The following guideline is based on the Cleanliness

Code described in ISO 4406-1999.

Oil Cleanliness Values

Intervals

ISO 4406 Cleanliness Code

R6µm R14µm

During Factory Tests 20 18

First 100 hours of

Field Operation

20 18

Every 2000 hours of

Field Operation

19 17

The listed oil cleanliness values are for

reference only. Deviations from the listed values

should be communicated to Flowserve for evaluation.

Mineral oils oxidize and should be replaced at

intervals described in the table below.

5.2.2 Oil specifications

Straight mineral oils without additives are generally

preferred for bearing lubrication. It should preferably

be of the turbine type and not contain free acid,

chlorine, sulfur or more than a trace of free alkali.

Quality mineral oils with a minimum Viscosity Index

(VI) of 95 is recommended.

An ISO Viscosity Grade (VG) Number identifies

lubricating oils. The VG Number is the viscosity of the

oil at 40 °C. (104 °F.) in centistokes, see table b elow.

In the majority of instances, a turbine oil with a VG

Number of 46 (nominally equivalent to SAE 20) will

meet rolling element bearing lubrication requirements

(see oil temperature).

Lubricant must be compatible with all

parts requiring lubrication.

Oil replacement interval

Typical Oil Operating

Temperature

Operating

Cycle

Oil Change

Interval

Notes

Ambient Stand by 6 calendar months

Ambient – 71 °C

(Ambient to 160 °F)

Continuous 3 calendar months

Longer intervals between replacements may be

possible at these operating temperatures, but 3 month

intervals are recommended to protect against normal

oxidation, contamination, and deterioration. Regular oil

monitoring can inform this decision.

C – 82

(160 °F – 180 °F)

Continuous 3 calendar months

3 month intervals are recommended to protect against

normal oxidation, contamination, and deterioration.

> 82

(> 180 °F)

Continuous

As specified by

Flowserve

Continuous operation at oil temperatures above 82

(180 °F) requires consultation with Flowserve.

Oil specifications and characteristics

Oil Characteristics Operating Oil Temperature

C - 38

C (60

C -100

F) 38

C - 82

C (101

F -180

F).

Saybolt Viscosity (SSU) 38

C (100

F) 158 Seconds 215 Seconds

Pour Point -7

C (20

F) -7

C (20

Flash Point 204

C (400

F) 204

C (400

Recommended ISO Viscosity

Grade (VG) Number

32 46

5.2.3 Oil temperature

Oil temperature should be maintained between 16

(60

F) and 82

C (180

F).

The minimum bearing oil temperature

is 16

C (60

F). If necessary, prior to startup, one of

the following procedures should be employed:

a) Drain the oil in the bearing housing(s) and

replace with warm oil.

b) Heat the bearing housing(s) using heat tape (or

other suitable means).

c) Circulate warm liquid through the cooling jacket

or immersion cooler (if supplied).

d) Utilize oil with a lower viscosity, or VG number, or

consider using a synthetics hydrocarbon oil with

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