18
APV_RGMS4_ATEX_UK-1_122018.indd
UK
Modulating valve with supported producut diaphragm
APV DELTA RGMS4 - MFS + MFH ATEX
Instruction manual UK-1
APV
12. Service Instructions
12.2. Disassembly of valve to replace wear parts
1.
See chapter 12.1, pos. 1.–7.
2.
Remove the valve seat (27/27.1) from the housing (1).
3.
Remove the housing seals (8) and flange seals (3).
4.
Release the coupling between actuator rod and valve shaft.
5.
Release the coupling head (29) and counternut (22) from the upper
valve shaft (13).
Note:
Observe adjusting dimension between
counternut and valve shaft (see fig. 12).
6.
Pull the valve shaft with diaphragm (15), fan (16) and diaphragm
support (17) out of the yoke (12).
7.
Clamp the upper valve shaft (13) with the key surface in a vice -
Attention: Use protective chops! - and release the lower valve shaft
(25). Remove Loctite residues from the thread and threaded bore.
8.
Remove the diaphragm (15) and fan (16) from the upper valve
shaft. Remove the o-ring (18) from the fan.
9.
Remove the seat seal (26) from the lower valve shaft (25).
10.
Remove the o-rings (14, 11) and guide bush (10) from the yoke (12).
12.3. Disassembly of valve to modify kvs values or characteristics
1.
See chapter 12.1, pos. 1.–7.
2.
See chapter 12.2, pos. 2.–7.
3.
If a replacement of the diaphragm actuator (30) is required for the
modification of the kvs value, remove the air hose if necessary.
Release the nut by means of hammer and chisel and detach the
actuator.
upper
valve shaft
adjusting dimension
coupling head
counternut
fig. 12