© 2021 Nordson Corporation
7446567-02
10-6
Disassembly and Assembly
Valve Cartridge Assembly
See Figure 10-2.
NOTE:
Inspect all wearable components prior to assembly.
1. Install the small O-ring (32), which seals the air section of the valve cartridge
assembly from the material section.
CAUTION:
Ensure the small O-ring (32) is seated properly into the small O-ring groove
within the valve cartridge body (26).
2. Install the needle bearing (25) into the valve cartridge body (26) material section,
needle bearing bore.
CAUTION:
Ensure the needle bearing (25) is properly seated within the bearing bore.
3. Install the needle seal (33) into the seal bore of the valve cartridge body (26), on top
of the needle bearing (25).
CAUTION:
Ensure the seal (33) is properly seated, with the O-ring side of the seal (33)
facing out of the valve cartridge body (26).
4. Install the piston O-ring (29) onto the piston (28) of the needle/piston assembly (28,
27).
CAUTION:
Ensure the O-ring (29) is properly seated into the piston (28) O-ring groove.
5.
Push the needle/piston assembly (28, 27), needle (27) end first, into the valve
cartridge body (26) and through the bearing (25) and the seal (33).
NOTE:
The piston will be seated on top of the valve cartridge body (26).
6. Install the large O-ring (24) onto the valve cartridge body (26), large outer O-ring
groove.
CAUTION:
Ensure the large O-ring (24) is properly seated into the large outer O-ring
groove.
7. Install the parbak ring (23) into the small diameter, outer O-ring groove.
8. Install the sealing O-ring (22) into the small diameter, outer O-ring groove, with the
parbak ring (23).
CAUTION:
Ensure both the O-ring (22) and parbak ring (23) are properly seated into the
small diameter, outer O-ring groove.
9. Install the spring (30) and spacer (31) into the smart gun base.
10. Install the seal retainer (21) onto the end of the valve cartridge assembly.
