19
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
12.4. Assembly of valve and installation of new wear parts
Attention!
To provide for an easy assembly and an increased
lifetime of all wear parts (seals, guide bushings,
o-ring, etc.), the parts must be slightly greased.
The diaphragm is greased on the product-averted
side. Do not use sharp-edged tools for the
assembly of the a.m. wear parts to guarantee their
full
function.
1.
Install the housing seal (8) on the valve seat (27/27.1) and insert
both into the housing (1).
2.
Insert the flange seals (3) into the housing flange and insert the
flange (5) and install the housing (1) by means of the screws and
nuts (4, 6, 7) in the line system.
Attention!
Provide for proper alignment of the housing to the
line
flanges.
3.
Install the seat seal (31) on the lower valve shaft (25).
Attention!
To prevent air from being included in the groove,
use a suitable tool to vent the groove.
4.
Clamp the key surface of the upper valve shaft (13) into a vice.
Insert the o-ring (18) in the fan (16). Place the diaphragm (15) and
press it into the groove. Secure the lower valve shaft (25) with a
drop of the screw retention (e.g. type: Loctite semi-solid). Apply the
adhesive only in the threaded bore. Do not apply it in the thread
of the upper shaft (fig. 12.4). Fasten the lower valve shaft with the
upper valve shaft.
5.
Insert the diaphragm support (17) in the fan.
! Toothing of fan and diaphragm support must interlock.
6.
Insert the guide bushing (10) and o-ring (11, 14) in the yoke (12).
7.
Introduce the preassembled valve shaft in the yoke. The upper shaft
must be guided smoothly through the guide bush into the yoke. In
case of stiffness, check the even fit of the guide bushing.
guide bushing
diaphragm support
o-ring
o-ring
o-ring
seat seal
upper shaft
fan
diaphragm
lower shaft
Apply screw locker
in threaded bores.