7
2.8 Metal Reagent Head Models
The metal reagent head assembly is provided in several alloys. Piping of similar alloy should be selected.
Dissimilar materials can cause galvanic corrosion.
Do not backweld piping to the valve housings without first removing the valve housings from the pump as
excessive heat can damage the reagent head and other parts. Tie bars must be positioned on the valve
housing
before
welding.
2.9 Plastic Reagent Head Models
Care must be exercised when making connections on plastic reagent head models. Excessive tightening can
distort or break the plastic materials. Tubing should be rated for the highest discharge pressure expected. DO
NOT USE METAL PIPING.
3. Start-Up Inspection
Every 680 metering pump is tested for correct capacity at maximum pressure capability of the pressure relief
valve before shipment. The diaphragm cavity is fully primed and remains so for shipment. For shipping
purposes, the gear and hydraulic reservoir oil have been removed. Sufficient fresh PULSAlube oil is
included with the shipment for refilling the gear and hydraulic reservoirs.
WARNING
1.
DO NOT run pump without oil.
2.
DO NOT remove main gear box cover while pump is running.
3.
DO NOT run pump with coupling guard removed.
4.
DO NOT put hands or fingers in gear box or reservoir when pump is running.
3.1 Filling Gear and Oil Reservoirs
Remove the pump cover and fill both reservoirs with PULSAlube oil to the top of the gear box partition. Do
not overfill. PULSAlube oil is compounded to serve as both gear lubricant and hydraulic transfer fluid.
Check with factory if substitute oils must be used.
The cover assembly incorporates a free acting diaphragm to allow breathing of the reservoir and at the same
time seal the reservoir from the atmosphere. Be sure the diaphragm is properly positioned when replacing the
cover so that it will seal on the gear box.
3.2 Final Inspection
Because of the pump’s small size and light weight it sometimes receives severe handling during shipment.
Though physical damage may not occur, it is always possible for parts to move slightly in adjustment. This
situation might occur with motor or pneumatic control alignment. A quick visual check should be made to
assure that motor and control shafts have not shifted severely out of alignment or damage could occur from
starting the motor. If unusual vibration should occur after start up, realign the motor and coupling.
