Cp Valve Repair; Preparation And Safety; Replacing The Slider - ABB PGC5000 Series Service Instructions Manual

PGC5000
PGC5000 Series Service Instructions
5. Reconnect all tubing on the Liquid Sample Valve.
6. Close the isothermal oven door.

7.7 CP valve repair

This section describes how to replace the CP Valve slider, wedges, valve plate, and o-rings. The bulletin applies to both the 40
psig and 60 psig valves (see Figure 7.12).
VALVE BODY
VALVE PLATE
Fig. 7.12. Typical M2CP Valve

7.7.1 Preparation and safety

Ensure that there are no hazardous or flammable gases present in the immediate area of the analyzer.
The purged electrical sections of the analyzer will be declassified when purge is removed, and a danger
exists for fire, explosion, damage to property and injury or death to plant personnel during the nonpurged
time. Obtain proper permits such as hot work, etc.
Ensure adequate ventilation in analyzer shelter.
1. Stop the analysis at the end of a cycle.
2. Turn off sample and air to the analyzer.
Verify that the oven is cool (ambient temperature) before removing carrier gas.
3. Turn off power and carrier gas.
4. Open the isothermal oven door.
5. Locate the valve to be repaired.

7.7.2 Replacing the slider

The Slider is part of the Carrier Assembly. To ensure you have the correct slider for your application, verify the slider part
number from the Data Sheets supplied with your analyzer.
To replace the slider:
1. Perform the "Preparation and safety" procedure.
2. Open both Carrier Assembly latches by pulling down on the end of the latches.
3. Remove the Carrier Assembly from the Valve Plate and Valve Body, being careful to keep the latches in their open position.
4. Compare the old slider with the new slider to ensure they are the same.
5. Note the orientation of the slider's ports.
6. Remove the old slider from the Carrier Assembly.
7. Insert the new slider, ensuring that the ports are aligned in the same way as the old slider.
8. Wipe the bottom of the Valve Plate with methanol and a lint-free wipe to remove any slider residue or contamination.
SI/PGC5000-EN, Rev B
CARRIER
ASSEMBLY
7 Subassembly repair
67