Pulsafeeder Pulsa GLM DM7 User Manual download pdf (Page 27)

DIFFICULTY PROBABLE CAUSE REMEDY

Delivery erratic

Leak in suction line Locate and correct

Product cavitating Increase suction pressure

Entrained air or gas in product Consult factory for suggested venting

Motor speed erratic Check voltage and frequency

Fouled check valves Clean, replace if necessary

Inadequate backpressure

Increase discharge pressure to obtain a

minimum pressure difference of 5 psi from

suction to discharge

Delivery higher than rated

Suction pressure higher than discharge

pressure

Install backpressure valve or consult

factory for piping recommendations

Back pressure valve set too low Increase setting

Vack pressure valve leaks Repair, clean or replace

Noisy gearing, knocking

Discharge pressure too high Reduce pressure

Water hammer Install pulsation dampener

Low oil level

Examine sight glass on side of pump, add or

replace oil as required.

Piping noisy

Pipe size too small

Increase size of piping - install pulsation

dampener

Pip runs too long Install pulsation dampener in line

Pulsation sampener inoperative or flooded

Refill with air or insert gas. Inspect and replace

diaphragm and recharge

No surge chamber or dampener used Install pulsation dampener

Motor overheats

Pump overloaded

Check operating conditions against pump

design. Verify discharge pressure

High or low voltage Check power source

Loose wire Trace and correct

Incorrect motor wiring Verify and correct

Oil level low Check and add as cecessary

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 33

No comments

Pulsafeeder Pulsa GLM DM7 User Manual Page 27