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8.5.4
Maintaining the control stage with a larger diaphragm assembly
Falling components
Cleaning
Tightening torques
HON 5020 gas pressure regulator with HON 630 pilot
Figure
Depending on the specific pilot version, proceed as indicated in the relevant section:
For the multi-stage pilot version: Maintaining the load limiting stage (see page 82)
For the single-stage pilot version: Maintaining the fine mesh filter (see page 85)
Crush and impact hazard posed by components falling or toppling over accidentally.
When working with heavy components that have been removed or are yet to be installed,
injury may result if the components start moving in an uncontrolled manner, e.g., fall down
from the working surface or topple over.
Place removed components exclusively on level, horizontal working surfaces with enough
load-bearing capacity.
If necessary, secure removed components so that they will not fall or topple over.
Wear the required personal protective equipment.
Exercise caution when performing the relevant tasks.
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.
Observe the tightening torques below when following the instructions in this section:
Part
Hex nut
Upper connecting piece
Diaphragm housing screws
Hex nut
Diaphragm cover screws
Base plate screws
Step
Description
40
Screw the spring adjuster (2) back in a bit.
The correct setpoint adjustment cannot be
carried out until before commissioning
with the pilot installed.
Tightening torque
20 Nm (15 lbs)
20 Nm (15 lbs)
12 Nm (9 lbs)
10 Nm (8 lbs)
12 Nm (9 lbs)
12 Nm (9 lbs)
Maintenance
Step
18
24
34
36
42
46
72
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