NOZZLE MIX SYSTEMS
TROUBLE SHOOTING PRESSURE-REDUCING (LINE) REGULATORS
A. Symptom: Poor pressure control Causes: 1. Regulator undersized.
2. Regulator oversized. 3. Piping undersized. 4. Poor location of external balancing (impulse) tube. 5. Seat on valve disc worn or dirty.
B. Symptom: Pulsating.
Causes: 1. Poor location of external balancing tube.
2. Reflections of pulsations of another regulator in system. 3. Needs restriction in external balancing tube or in vent.
C. Symptom: Chattering (rapid pulsations). Causes: 1. Regulator oversized. 2. Valve seat dirty or damaged.
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