Replacing The O-Rings - ABB PGC2000 Operation And Service Manual

Replacing the O-Rings

Since the o-rings are inside the valve, you will have to remove the Valve Body from the analyzer. The
o-rings come in a kit, with different kits for 40-psig and 60-psig CP valves (see Figure 8-49). The
rework procedure is the same for both valves.
DESCRIPTION (dimensions are in inches)
O-Ring, Fluorocarbon, 1/4 x 1/8 x 1/16
O-Ring, Fluorocarbon, 2 x 1-7/8 x 1/16
O-Ring, Fluorocarbon, 1-3/4 x 1-1/2 x 1/8
O-Ring, Fluorocarbon, 1-3/8 x 1-1/4 x 1/16
O-Ring, Fluorocarbon, 1-1/2 x 1-3/8 x 1/16
Grease, Molykote 33
It is essential to the analyzer's operation that all valve ports remain correctly
connected.
To replace the o-rings:
1. Perform the "Preparation and Safety" procedure.
2. Tag each port connection to the valve, using the port numbers stamped on the Valve Plate.
3. Remove the port connections.
4. Remove the air connection on the Valve Body. (You do not have to remove the connection on
the Mounting Plate that attaches to the analyzer.)
5. Using the 7/64- inch hex driver from the CP Valve Tool Kit, loosen the four screws that attach the
Valve Body to the Mounting Plate.
6. Rotate the Valve Body counterclockwise and remove it from the Mounting Plate.
7. Open both Carrier Assembly latches by pulling down on the end of the latches.
8. Remove the Carrier Assembly from the Valve Plate and Valve Body.
9. Push the piston rod into the Valve Body to release the piston, being careful not to scratch any
valve surfaces.
10. Remove the piston and piston rod from the Valve Body.
11. Remove the piston rod o-ring and the piston o-ring.
2000-OSM, F2
Figure 8-49. O-RING KITS
NOTE
PART NUMBER
40-PSIG KIT
60-PSIG KIT
764K001N-2
764K001N-1
45051-4-11 45051-4-11
45051-4-35
45051-4-61
45051-4-29
450501-4-31
3616175-1 3616175-1
8-79