Eco GA Series, Installation, Operation & Maintenance Manual, Page: 8 / 59

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continue when pump is stopped until pump pressure is reduced to within 20 psi of
double seal chamber pressure.
4. Where external seal cooling is required, provide for drip feed of cooling liquid over
rotating seal head. Where internal seal cooling and lubrication by flush stream is
intended, check piping from pump discharge to seal housing or from external source
to seal housing. Make sure all flush streams are clean.
5. Make sure discharge valves are open, start pump and check for proper operation.
Adjust packing as necessary, but allow sufficient time for proper run in. Check flush
streams for proper operating pressure and flow. If pump bearing areas run hot, or
seal/stuffing box areas run hot, shut pump down and determine cause.
6. Do not run dry.
7. Do not pump abrasives.
8. Do not run metal/metal gears below 100 cPs or faster than 1450.
9. For pumps with Teflon gears and wear plates, hand-tighten the rear housing bolts.
Slowly increase the speed and pressure. Gradually increase the torque value of the
housing bolts until the pressure is achieved. Do not exceed the recommended
torque values.
5. MAINTENANCE
The timing for maintenance of the pump is established primarily on past performance.
Each installation is different. Therefore, detailed maintenance records of past
performance can be invaluable for determining future preventative maintenance intervals.
During routine pump inspections pay particular attention to the mechanical seal and
bearing areas because those areas will determine future maintenance intervals. For
motor maintenance instructions consult the motor manufacturer.
WARNING: BEFORE PERFORMING ANY MAINTENANCE REQUIRING PUMP
DISASSEMBLY, BE SURE TO FLUSH PUMP THOROUGHLY WITH A
NEUTRALIZING FLUID. WEAR PROTECTIVE CLOTHING AND HANDLE
EQUIPMENT WITH PROPER CARE.
1. Changing Service
When changing a pump from one service to another, be sure to check that all wetted
pans of the pump (including seals) are compatible with the fluid to be handled and that
the motor is sufficiently sized for the application. If in doubt, contact your Eco distributor.
2. Inspect for Wear
Whenever gear pumps exhibit reduced flow rates, inability to maintain pressures, noisy or
otherwise abnormal operation, first refer to the troubleshooting section. If the problem
cannot be resolved the pump must be inspected for wear or damage. Eco Gearchem
pumps can be easily opened for cleaning and inspection without disturbing piping
connections by removing the pump rear housing.
Where inspection shows wear, rebuilding the pump using an Eco KOPkit is strongly
recommended. Where pumps are equipped with two metallic or plastic gears,
replacement with a new set is preferred. Pumps have a metallic drive gear and plastic
idler gear can often be restored to original performance by replacing the idler gear alone.
3. Mechanical Seal Design
Eco Gearchem pumps equipped with mechanical seals use either single internal, single
external, or a double seal. In addition, there is a variation for vacuum service, of the
external seal whereby the seal housing is lengthened between the seal and the pump. All
seals are Type 9. These configurations are illustrated in Drawing SD-2652 and SD-2778.