Table of Contents
Advertisement
How to proceed:
1. Undo and remove the four screws (16,
width across flats 13). Keep in a safe
place for later.
2. Use an Allen key (6 mm) to unthread the
stopper (15.2). Unscrew the stop screw
(15). Make sure that the inserted washer
(15.1) does not get lost. Keep the parts in
a safe place for later.
3. The grub screw with trunnion (12.1) acts
as a locking pin and prevents the cover
(1.1) and plug stem (19) from being
pulled off separately. Turn the grub screw
to the point where it is still held in place by
the thread.
1.1
21
1
Fig. 13: Replacing the two diaphragms in Type 2173-10
EB 2640 EN
Note
The plug stem is guided by ball bearings in
the cover (valve bonnet). On pulling off the
cover, the ball bearings embedded in food
grade lubricant are exposed and might fall
out.
4. Carefully pull off the cover.
5. Undo the grub screw (12.1). Dismantle
the plug stem (19) and plug support (18)
that are bolted together.
6. Remove the diaphragms (21) along with
the internal and external spacing rings
(20).
7. After replacing the diaphragms: Assemble
in the reverse order. Tighten the four
screws (16) with a tightening torque of
30 Nm.
15.2
15
15.1
12.1
19
17
Valve body
16
1.1 Cover
4.1 Two diaphragms
12.1 Stud with trunnion
4.1
15
Mechanical stop (screw)
15.1 Retaining washer
15.2 Stopper
Screws (4 pcs./width across flats
16
SW 13)
20
18
Plug support
18
19
Plug stem
20
Spacing rings
2 1 Ball bearings
Cleaning and maintenance
23
Advertisement
Table of Contents
