Flowserve Valtek FlowTop V726 User Instructions page 10

Valtek FlowTop
Recommended maintenance actions using the Logix digital positioner with ValveSight diagnostic solution software
Service
No.
7 Visual inspection of
diagnostic interface
8 Check health param-
eter of valve
9 Check health param-
eter of actuator
10 Check health param-
eter of control
11 Check health param-
eter of positioner
Recommended maintenance actions for valves with built-on linear thrust unit "heavy"
12 Lubrication of thrust
unit (grease nipple)
Prior to valve operation, we require, that you check the following conditions to reduce the risk of malfunction and safety
related incidents.
No.
1 Check the packing follower for proper tightness.
2 Check for signs of gasket leakage through the bonnet
and end flanges.
3 Check if all nuts and bolts are securely fastened.
4 Check valve for smooth, full-stroke operation. Un-
steady stem movement could indicate an internal
valve problem.
10
After these requirements are confirmed proceed with valve maintenance.
FCD VLEEIMFTOP-03 (EN/A4) June 2023
Inter-
val
Good
Week- No action - Take action per warning
ly valve is
healthy
Warn- No action - Replace packing box com-
ing valve is ponents per warning
healthy
Warn- No action - Check and retighten air
ing actuator is supply
healthy
Warn- No action - Overhaul or replace valve; trim and bonnet components must be
ing control is checked and / or repaired after alarm
healthy
Warn- No action - Start step test
ing positioner is
healthy
Yearly Standard: 5 - 12 ccm - Klüber Wolfracote C
Oxygen service: 5 - 12 ccm - Airpress C 40 KP
Table 5: Service activities check list
Check
Table 6: Basic safety massages for maintenance the valve
Valve Condition
Adequate
Overhaul or replace required part
per alarm
Overhaul or replace valve after alarm
Overhaul or replace actuator after
alarm
Overhaul or replace positioner after
alarm
Overhaul or replace thrust unit after
product lifecycle
Possible malfunction or safety related incident
Flowserve uses three solutions to preload the packing rings.
These are adjustable, outside spring loaded, or inside spring
loaded. The variants are described on pages 50 - 53, 61 as
well as the correct tightening method and the recommended
torques.
Do not overtighten packing.
Overtightened packing can cause excessive packing wear and
high stem friction that may impede plug movement.
If leakage cannot be stopped, the packing must be replaced.
Tighten the bonnet bolting nuts. See Section 13.3: Disassembly
and Reassembly for instructions. Also see Table 14.2 on page 60.
Avoid critical operating conditions if excess noise or
vibration levels occur during operation.
Internal valve failure requires an immediate overhaul or control
valve replacement by qualified stuff.
Inadequate