Maintenance Instructions
Control Valve Series 35 000
KÄMMER VENTILE GMBH • MANDERSCHEIDTSTRASSE 19 • D - 45141 ESSEN • TEL.: ( 0201) 89 19 – 5 • FAX: ( 0201) 89 19 – 600
4
DISASSEMBLE AND ASSEMBLE VALVE
4.1
Disassemble Valve
(see Fig. 2)
4.1.1
Remove bonnet flange bolting and raise
bonnet and plug assembly.
Caution: heavy assemblies may require
a hoist
4.1.2
Unscrew seat ring using seat ring tool and
carefully press plug stem evenly out of the
upper body.
4.1.3
With valves DN 80 / kv 63 and larger, the
plug head can be unscrewed (see Fig. 3).
Remove plug head from stem by securing
valve stem against rotation with a hooked
spanner and turning plug head with an
adjustable face pin tool.
4.1.3
Check seating faces of seat ring and plug for
damage. Gasket surfaces must be clean and
free of damage.
4.1.4
Press guides, packing and packing follower
from below using a drift (the drift must have
a slightly larger diameter than the plug stem).
Important: To prevent damage to the plug
or plug stem, follow the above instructions
precisely.
4.1.5
If a seat surfaces need re-machining, seat
and plug seating surfaces must be reworked.
The seat angle on the plug is 30°, on the seat
ring 25°. If the valve is correctly assembled,
lapping is not required.
Important: When re-machining the plug,
protect plug stem from damage. The seat
surface must be concentric to the plug
stem. When re-finishing the seat, the seat
surface must be concentric to the seat
outer diameter.
4.2
Assemble Valve
(see Fig. 2)
4.2.1
All worn or damaged parts must be replaced.
Reusable parts must be clean. expenable
parts such as gaskets, packing and O-rings
should always be replaced.
4.2.2
Insert seat ring and tighten. For torques, see
following table.
4.2.3
If necessary, screw plug head back on to stem
and carefully guide plug stem through the
bonnet, to avoid damage.
4.2.4
Insert new bonnet gasket.
4.2.5
Position bonnet slowly and absolutely upright
on body, to avoid damage to seat/plug.
4.2.6
Tighten bonnet flange bolts alternating
crosswise finger-tight and then tighten with a
wrench. For torques, see following table.
4.2.7
Replace packing by inserting packing rings one
at a time tapping each one down with a suitable
bushing.
IMPORTANT: ensure that the gaps in the
packing rings are distibuted evenly around the
circumferance in the packing box (gaps not in
line).
Note: different packings and fitting sequence
is shown in the spare parts list.
6.2.8
Insert packing follower. Fit gland nut for
transport purposes only. Gland nut to be fitted
correctly and tightened down when actuator is
mounted.
Size
Body
Torque
material
DN 15/25 (
1
/
2
/1")
1.4581
cast
125 Nm
1.4571
forged
125 Nm
DN 40/50 (1
1
/
2
/2")
1.4581
200 Nm
1.4571
255 Nm
DN 80 (3")
1.4581
230 Nm
1.4571
270 Nm
DN 100 (4")
1.4581
400 Nm
1.4571
500 Nm
DN 150 (6")
1.4581
450 Nm
1.4571
600 Nm
Hex bolt
.
Waisted bolt
Studs
Thread
DIN 933
DIN 2510
DIN 939
A2-70
1.7709
1.7258
CK 35
M 8
20 Nm
–
–
–
M 10
35 Nm
–
–
20 Nm
M 12
60 Nm
44 Nm 36 Nm
35 Nm
M 16
145 Nm
115 Nm
92 Nm
80 Nm
M 20
280 Nm
–
–
–
M 24
250 Nm
–
–
270 Nm
