Replace elastomers. Check whether the liquid medium agrees with order details, if necessary change material.
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8 TROUBLE-SHOOTING AND REMEDYING
PAGE
8.1
Date Name Signed Revision: 3
issued 18.10.95 Mangel Substitute for issue
approved 19.10.95 Hantschk of 22.09.95
released 20.10.95 Hantschk
text no. 30100
copy to: 95
Fill the pump up, then pump through manually using a suitable appliance; if necessary use glycerine as lubricant in the stator.
Check order information. Examine electrical installation (possibly 2 phase operation).
Remove foreign bodies and eliminate possible damage.
Check whether the liquid medium agrees with the order requirements. Possibly change stator material..
Clean the pump and rinse through after each run.
Check seals and tighten pipe connections.
In the case of adjustable drives : increase the rpm. If necessary change the drive.
Decrease suction resistance, lower the temperature of the liquid medium, install the pump at a lower location.
Replace with a new stator or ensure correct liquid temperature.
Change rotor, establish the cause. Wear and tear, corrosion, cavitation; if necessary change to a different material or coating.
Re-align the unit.
Replace roller bearings, lubricate, reseal. At higher temperatures observe the lubricant and the bearings.
Measure the viscosity and compare with order details. If necessary adjust viscosity or change the drive.
Service stuffing box according to page 7.4, if necessary renew worn shaft.
Change electrical connection.
Measure the pressure with a manometer and check against order details. Reduce the pressure or change the drive.
If the liquid medium temperature cannot be lowered, use a reduced diameter rotor.
Increase the liquid part of the medium.
Increase the suction liquid level, prevent turbulance and air bubbles at the inlet.
Stuffing box : tighten or renew. Mechanical seal : renew seals, eliminate solid deposits.
Warm up the pump (stator) to operating temperature first of all.
Fill up the pump, provide for dry running protection, move the pipes.
Fit a new stator. Check the liquid medium agrees with order details; if necessary change the stator material.
Replace relevant parts, carefully reseal and lubricate.
Use a new connection and re-align the pump.
In the case of adjustable drives : lower the rpm.
Measure specific weight and compare with order details. If necessary adjust specific weight or change the drive.
Replace fitted packing with another packing type.
Replace relevant rings with new ones.
Remedy
GB
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