Einbau- und Betriebsanleitung
Installation and Operating instructions
Instructions de montage et de service
5702-8010
10
08/2017
When operating electric actuators, the interval between changing the direction of the actuator should be at least 200 ms.
The minimum tracking time in one direction should not be lower than 60 ms. and a maximum of 1200 switches per hour.
In order to prevent premature wear of the control valve, oscillations in the closing range must be avoided.
4
Maintenance
4.1
Spindle packing
Generally spindle packings have to be changed or tightened immediately (for pure graphite assemblies), new packings can
otherwise leak again after a short period.
The design of the spindle packing is described in the technical data sheets. Spindle packings are available as spare parts set
from the manufacturer. When ordering spindle packing always state the valve serial number ("W. Nr."). This is on the
identification label that is attached to the cross carrier plate.
4.2
Changing stuffing box packing
Release pressure from valve and discharge piping according to regulations
The actuator must be removed to exchange the spindle packing. Assembly and disassembly of the actuator are described
in the operating instructions of the respective actuator.
Loosen and remove cap nut
Remove old packing set and clean packing compartment
Clean valve spindle
Insert new packing set according to cross-section drawing
Tighten cap nut
Attention!:
Tightening the pure graphite assembly too much may cause high friction, which can impair the functioning of the
control valve.
4.3
Changing cone assembly
We recommend renewing the spindle packing at the same time as replacing the cone assembly. The flat gasket (503) between
housing and lid is required when replacing the cone assembly necessary.
Release pressure from valve and discharge piping according to regulations
The actuator must be removed to exchange the cone assembly (please refer to the operating instructions of the respective
actuator).
Release cover (201) from housing (101)
remove cone assembly from housing (101) and replace
Clean housing seal areas
Place cover (201) with cone assembly (300) on housing (101) and screw tight in crosswise order (for tightening torque see
table in appendix)
Mount actuator onto valve according to operating instructions and check limit stops.
4.4
Changing nozzle pipe
We recommend renewing the stuffing box packing when changing the nozzle pipe.
Release pressure from valve and discharge piping according to regulations
Remove old stuffing box (extractor) and remove nozzle pipe from cover
Clean stuffing space
Insert new nozzle pipe
Insert new packing in stuffing box according to cross-section drawing
Tighten cap nut
