Frick SGXH-4021 - Maintenance Schedule; Recommended Maintenance Intervals

070.650-IOM (JUL 19)
Page 37
SGC/SGX ROTARY SCREW COMPRESSOR
MAINTENANCE
Maintenance schedule
Recommended schedule for SGC/SGX FRICK rotary screw compressor preventive maintenance operations.
1. Check bolts, shim packs, center inserts, keys, and all bolt torques.
2. Verifytightnessofboltsonsuctionanddischargeanges.See Table 6 below for torque requirements.
3. Units with variable speed drives - check for excess vibration and skip frequencies anytime unit operating conditions change.
4.Checkandtorqueallterminalsintheprocessorandstarterpanelasstatedinthespecicationpostedintheenclosure.
5. CheckcalibrationofSlideValve,SlideStop,pressuresandtemperatures.ConductcalibrationwithNISTcertieddevices.
6. Vibration measurement must be carried out continuously to obtain optimum preventive control on bearings. If not continuously controlled,
then every 6 months, more frequently if levels increase.
Frequency or hours of operation (maximum)
Maintenance
200
1000
5000
8000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
55,000
60,000
65,000
70,000
75,000
80,000
85,000
90,000
95,000
Change Oil As Directed By Oil Analysis
Oil Analysis
n
Every 6 Months
Replace Filters
n n n n n n n n n n n
Clean Oil Strainers
n n n n n n n n n n n
Clean Liquid Strainers
n
n n n n n n n n n n
Replace Coalescers
n n n
Check and Clean Suction
Strainer
n n n n n n n n n n n
Check Coupling
(1)
n
Annually Regardless of Operating Hours
Suction and Disch Flange Bolts
(2)
n n n n n n n n n n n n n n n n n n n n n n
VFD Units Check Skip Frequency
(3)
n n n n n n n n n n n n n n n n n n n n n n
Check Electrical Connections
(4)
n
n n n n n n n n n n n n n n n n n n n
Check Sensor Calibration
(5)
n
n n n n n n n n n n n n n n n n n n
n n
Check BPR Function
n n n n n n n n n n n n n n n n n n n n n n
Vibration Analysis
(6)
n
Every 6 Months, More Frequently If Levels Increase
Replace Shaft Seal When Leak Rate Exceeds 7 - 8 Drops per Minute
Compressor
model
Discharge ange Suction ange
Bolt size Torque* (ft-lb) Bolt size (in.) Torque* (ft-lb)
SGC 1913 M20 X 2.5 180 M20 X 2.5 180
SGC 1918 M20 X 2.5 180 M20 X 2.5 180
SGC 2313 M20 X 2.5 180 M20 X 2.5 180
SGC 2317 M20 X 2.5 180 M20 X 2.5 180
SGC 2321 M20 X 2.5 180 M22 X 2.5 280
SGC 2813, 2817 M22 X 2.5 280 M22 X 2.5 280
SGC 2821 M22 X 2.5 280 M24 X 3.0 300
SGC 3511 M24 X 3.0 300 M30 X 3.5 500
SGC 2824 M22 X 2.5 280 M24 X 3.0 300
SGC 3515, 3519, 3524 M24 X 3.0 300 M30 X 3.5 500
SGX 4013 1.125-7 UNC x 4 650 1.125-7 UNC x 4 650
SGX 4018, 4021 1.125-7 UNC x 4 650 1.25-7 UNC x 4.5 825
* Based on: Gaskets-Garlock
®
Blue-Gard
®
3300; Bolts-class 8.8 or stronger hex head bolts, lightly oiled and clean
Table 6: Bolt sizes and torque