Alfa Laval GJ PF-FT, Инструкция по эксплуатации, Страница: 13 / 43

4 Operation
13
Pay attention to possible faults
Read the instructions carefully
Step 1
Insufficient Flow
The Alfa Laval GJ PF-FT was configured to meet certain operating conditions outlined at the time of the initial sale, such as
flow rate (m^3/hr)(GPM), pressure (bar)(PSI), temperature, chemical content of the wash fluid, cycle time, etc. If the Nozzle
(47) size is too small and/or the opening at the bottom of the Stator (12) is too large, the Tee Housing (8) will not turn. Look
for restrictions in the fluid supply such as a clogged filter, kinked hose, or deposits in the piping.
Step 2
Tight Clearances
A recently overhauled Alfa Laval GJ PF-FT may fail to operate when first returned to service. If the machine seems otherwise
fine, try running it with at least one Nozzle (47) removed. The reduction in pressure and additional flow will invariably be
enough to overcome the extra resistance of new Bearings and Seals. Twenty minutes of operation should loosen the machine
to run normally with the Nozzles reinstalled.
Step 3
Debris Inside
Loosen the Collar Set Screw (34), remove the Sanitary Inlet (11), and then lift out the Stator (12).
Look for and remove any debris caught in the Stator (12) and the vanes of the Rotor (48).
Remove any material wound around the Input Shaft (39). In addition, check for any debris caught in the outlet holes of the
Stem (7), the nose of the Tee Housing (8), the Nozzle Housing (9), and the Nozzles (47).
4.3 Cleaning Solution Leakage
Note: The Alfa Laval GJ PF-FT is a self-flushing machine and thus has up to 15% leakage designed into the machine.
Excessive leakage may indicate a larger issue.
- Worn Bearings and Seals
Leakage from the Tee Housing (8) or Nozzle Housing (9) usually indicates worn Housing Bearings and Seals. Inspect
them for wear (sealing lips are worn to a smooth surface) or damaged lips or loss of spring tension (indicated by excessive
dry deposits of dirty or abrasive cleaning solution on the spring), and replace as required.
- Worn Housing Cups
Inspect the Housing Cups (24) and (27) for excessive wear (grooved or scored).
Replace any that show distinct grooves.
- Worn Collar O-rings
Severe leakage between the Sanitary Inlet (11) and Cap (6) may indicate worn or damaged Collar O-rings (3) and (54).
Remove the (11 as described in Section 6.3
– General Dismantling, and inspect the (3) and (54) for signs of damage or
wear.
- Worn Clutch O-ring
Severe leakage above the Tee Housing (8) may be the result of excess wear on the Clutch O-ring (33). There will be
leakage through this point regardless due to the normal clutch operation, but severe leakage is not ordinary. Remove the
Tee Housing (8) as described in the general disassembly instructions and inspect the (33) for damage or wear.