Flowserve 191 000 Series - Manual (Page 2)

2 11.00
Flow Control Division
Kammer Control Valves
1.3 QUICK CHECK:
Before operating, check the valve as follows:
1.3.1 Open and close the valve, and observe the movement
of the actuator stem. The movement must be smooth
and linear.
1.3.2 Check for maximum stroke through change of signal
(for pneumatic positioners, 0.2 - 1.0 bar or corre-
sponding split-range values; for IP positioners, 4-20
or 0-20 mA).
1.3.3 Check all air connections for leaks.
1.3.4 The packing follower must always be tight to ensure
that the packing kit (guide bush with O-Rings) func-
tions correctly.
1.3.5 Check the wiper ring for damage.
1.3.6 Check fail-safe position. To do this, close supply pres-
sure and observe whether the valve opens or closes
as prescribed.
Typical valve configuration
Fig. 1
Nut
Wiper ring
Packing follower
Plug
Clamp
Guide bush
O-Ring
Guide bush
O-Ring
O-Ring
Body
1.3.7 After use at fluctuating temperatures, re-tighten all
bolt connections and check for leaks.
2 MAINTENANCE
Check valves for correct functioning at regular inter-
vals (at least once every 6 months) as follows. This
check can be made when installed and in many cases
without interrupting production. If internal defects are
suspected, see section on „Disassembly and Assem-
bly of Valve“.
2.1 Examine gaskets for leaks and if necessary re-tighten
bolts (see Fig. 1).
2.2 Check valve for damage caused by corrosive residues
or corrosive vapours.
2.3 Clean valves and if necessary repaint.
2.4 Check that the packing follower is tight.