Viking Pump TSM350 HG-08/HG-10 Helical Gear Pumps - Manual (Page 7)

SECTION TSM 350 ISSUE A PAGE 7 OF 10
Fluttery, jumping or erratic reading would indicate:
1. The liquid is vaporizing.
2. Liquid is coming in to the pump in slugs, possibly an air leak or insufficient liquid
above the end of the suction pipe.
3. Vibration from cavitation, misalignment, or damaged parts.
Pressure Gauge - Discharge Port
High reading would indicate:
1. High viscosity and small diameter and/or lengthy discharge line.
2. The strainer or filter is plugged.
3. The pressure relief valve is set too high.
4. Valve in the discharge line partially closed.
5. Line partially plugged from build up on inside of pump, solidified product or foreign
object.
6. Liquid in the pipe not up to temperature.
Low reading would indicate:
1. Pressure relief valve set too low.
2. Pressure relief valve poppet not seating properly.
3. Pump assembly bolts not torqued to specifications.
5. The bypass around pump partially open.
6. Pump is damaged or worn.
7. The pump has too much internal clearance.
Fluttery, jumping or erratic reading would indicate:
1. Cavitation.
2. Liquid is coming to the pump in slugs.
3. Air leak in the suction line.
4. Vibrating from misalignment or mechanical problems.