Honeywell HON 5020 User And Maintenance Manual page 75

HON 5020 gas pressure regulator with HON 640a / HON 642a pilot
Figure Step Description
26 Lightly coat the thread surfaces with
threadlocker. Put the cap (1) in place.
Tighten the cap while using an open-end
wrench to hold the diaphragm plate (1) in
place so as to prevent the components
from turning.
Observe the tightening torque information
provided at the beginning of this section.
27 Flip the valve body over.
Install the new diaphragm (3), including
the stem seal.
Make sure that the diaphragm is aligned
correctly: The side of the diaphragm that
has a depression at the center should be
facing upward.
28
Lightly coat the thread surfaces with
threadlocker.
Install the diaphragm plate (2) and the nut
(1).
Tighten the nut while using an open-end
wrench to hold the diaphragm plate (2) in
place so as to prevent the components
from turning. Observe the tightening
torque information provided at the begin-
ning of this section.
29 Remove the assembly aid from the valve
body.
Screw the assembly aid (2) into the nozzle
(1).
30 Align the valve body (1) as shown.
Turn the nozzle (3) in such a way that, as
shown in the sectional view, the dowel pin
is coaxially aligned with the lower hole and
the nozzle opening is facing upward.
Insert the nozzle (3) with the assembly aid
(2) all the way into the connecting piece.
Maintenance
75