Maintaining The Actuator Assembly - Honeywell HON 5020 User And Maintenance Manual

8.4

Maintaining the actuator assembly

Contents
8.4.1 Maintaining the actuator assembly
Requirements
Cleaning
Tightening torques
HON 5020 gas pressure regulator with HON 630 pilot
Topic
Maintaining the actuator assembly
Make sure that the following requirements are met:
 The system is not pressurized, see Starting maintenance (see page 47).
WARNING! Mortal danger associated with pressurized components.
Observe the following cleaning instructions:
 Before assembly, all parts must be cleaned in order to remove any foreign particles
(swarf) and soiling.
 If screws, bolts, or washers are replaced with identical new parts, any oil on these new
parts must first be removed.
Tightening torques of the bolts securing the regulator top cover are as follows:
Nominal size Pressure rating
Class 150/300/600
1" (DN 25)
PN 16/25/40
Class 150/300/600
2" (DN 50)
PN 16/25/40
Class 150
3" (DN 80)
PN 16
Class 300/600
3" (DN 80)
PN 25/40
Class 150
4" (DN 100)
PN 16
Class 300/600
4" (DN 100)
PN 25/40
Class 150
6" (DN 150)
PN 16
Class 300
6" (DN 150)
PN 25/40
Class 600
6" (DN 150)
Screw specifications
5/8" UNC grade 7
M16
5/8" UNC grade 7
M16
5/8" UNC grade 7
M16
3/4" UNC grade 7
M20
5/8" UNC grade 7
M16
3/4" UNC grade 7
M20
5/8" UNC grade 7
M16
3/4" UNC grade 7
M20
1" UNC grade 7
M24
Maintenance
Page
50
Tightening torque
203 Nm (150 ft lbs)
203 Nm (150 ft lbs)
203 Nm (150 ft lbs)
353 Nm (260 ft lbs)
203 Nm (150 ft lbs)
353 Nm (260 ft lbs)
203 Nm (150 ft lbs)
353 Nm (260 ft lbs)
705 Nm (520 ft lbs)
50