Flowserve 132000 LinedFlow Linear Lined Globe Control Valve IOM - Manual (Page 7)

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User Instructions LinedFlow - KMENIM3202-02 01/12
7
13 STEM
The valve stem is equipped with a blowout protection fea-
ture. This ensures that the valve stem cannot be removed
from the top of the valve. This is an important safety factor
when the actuator is removed from the valve, because there
would be otherwise no mechanical restriction.
14 PacKINg
The 132000 valve series has a safety packing to back-up
the bellows seal and to prevent leakage to the outside in
the event of a bellows rupture.
15 TEST cONNEcTION
WaRNINg: If the optional test connection (1/4” NPT) is
present, it must be sealed to prevent the medium from
exiting in the event of a bellows rupture.
16 Quick check
Before operating, check the valve as follows:
16.1 Open and close the valve and observe the movement of the
actuator stem. The movement should be smooth and linear.
16.2 Check the minimum stroke by changing the control signal
(for pneumatic position regulator 0.2 – 1.0 bar or corre-
sponding “split range” values for IP position regulator 4-20
or 0-20 mA).
16.3 Check all air connections for leaks.
16.4 Check the packing nut (see Table 8).
caUTION: An excessively tightened gland nut can cause
excessive packing wear and can hinder the free movement
of the plug stem.
16.5 Check fail-safe position. To do this, close supply pressure
and observe whether the valve opens or closes as defined.
16.6 After use under varying temperatures, retighten all threaded
connections and check for leaks.
17 MaINTENaNcE
Check for proper function at regular intervals as follows.
These checks can be accomplished in the installed state
and, in many cases, without shutting down production. If
internal defects are suspected, see section “Disassembly
and assembly of valve”.
17.1 Check gaskets for leakage and retighten bolts if required
(see Fig. 1).
17.2 Check bellows seal, test connection and body drain screw –
if present – for leakage to the outside.
17.3 Check valve for damage resulting from corrosive process
residues or corrosive vapors.
17.4 Clean valves and repaint as required.
17.5 Check packing nut (see Table 8).
caUTION: An excessively tightened gland nut can cause
excessive packing wear and can hinder the free movement
of the plug stem.
17.6 If possible, open and close valve and check for maximum
stroke and ensure that the plug stem moves without jerking.
Irregular motion of the plug stem can indicate an internal
defect
WaRNINg: ..Keep hands, hair, clothing, etc. away from all
moving parts. Failure to observe can lead to severe injuries.
17.7 Ensure that all accessory parts are seated tightly.
17.9 Connect air supply and check safety position.
17.10 Check air filter, if present, and replace element as necessary.
Table 5: Valve stem materials
Valve stem 1.4571 (Standard)
2.4819 (Hastelloy C276) (optional)
STOP!
STOP!