Emerson VSG, VSSG manual 1. Maintenance/Service Schedule, Oil Circuit, Unit, Control, Calibration

VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG

5 – 1

Table 5-1. Maintenance/Service Schedule

Follow this table formaintainingand

MaintenanceandService

Oil sampling is recommended every 2 to 3 months for the first year. Thereafter,45,000

as required,55,000

increase60,000

Service Interval (Hours) (¹)

(Based on dry clean gas)

Group

Inspection/

Maintenance (2)

200

2,500

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

50,000

Oil Change

Replace oil based on oil analysis report or visual contamination.

servicingthe

Schedule

Oil Analysis

sampling time period if contamination of oil is unlikely or decrease sampling time period if contami-

Oil Circuit

nation of oil is evident. Take an oil sample any time during operation If there’s reason to believe that

the oil is contaminated. For additional information on oil, refer to Oil and Oil Flow operation.

Oil Filters (3)

-

-

-

-

R

-

-

R

-

-

R

-

-

R

Oil Strainer

I

I

I

I

I

I

I

I

I

I

I

I

I

I

compressor

Coalescing Filter

-

-

-

-

R

-

-

R

-

-

R

-

-

R

Coalescing Drain Line

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Compressor

Suction Screen

I

-

-

I

-

I

-

I

-

I

-

I

-

I

unit

Unit

Coupling Alignment

I

I

I

I

I

I

I

I

I

I

I

I

I

I

at

and Integrity

hourly

Motor (Compressor)

See Motor Manual for proper lubrication procedures and service intervals.

Transducers

I

I

I

I

I

I

I

I

I

I

I

I

I

I

intervals.

Control

RTDs

I

I

I

I

I

I

I

I

I

I

I

I

I

I

Calibration

Slide Valve Motors

Slide

valve

calibration should be inspected monthly. Inspections can be performed through the

control panel. If a Non-Movement Alarm appears, calibrate immediately.

Compressor (4) (5)

Compressor (6)

-

I

-

I

-

I

-

I

-

I

-

I

-

I

Bearings

-

-

-

-

-

-

-

-

-

-

-

-

-

I

I = Inspect

S = Sampling

R = Replace

(1)Vilter recommends that a Preventative Maintenance Program be developed by Vilter GC (Gas Compression) Service Center.

(2)Daily records should be kept on suction, discharge, oil pressures & temperatures, along with ensuring Temp Leaving Oil Separator is above Dew Point.

(3)Replace oil filters when pressure drop reaches 7 PSID (maximum allowable pressure drop is 15 PSID).

(4)The life of the compressor will be increased by purging the compressor unit with dry nitrogen or sweet, dry natural gas at shutdown.

(5)Header drains should periodically be drained for liquid build-up to prevent compressor damage, see Piping in Section 3.

(6)Inspections include: gate rotor inspection, backlash measurement, shelf clearance, end play measurement (main rotor & gate rotor), gate rotor float, slide valve inspection.

Section 5 • Maintenance/Service