Pulsafeeder Pulsa GLM DM1-6 User Manual download pdf (Page 10)

3.3 Priming the Reagent Head

1. When handling process liquids, follow all applicable personal and facility safety guidelines.

2. Ensure that the pump is ready for operation and that all process connections are secure.

3. Open the suction and discharge line shutoff valves.

4. If the piping system design and the storage tank are such that the product flows due to gravity through

the pump, reduce the discharge pressure and the system will self prime when the pump is started. In

the event the discharge line contains a significant amount of pressurized air or other gas, it may be

necessary to lower the discharge pressure to enable the pump to self-prime.

5. If the installation involves a suction lift, it may be necessary to prime the reagent head and suction line.

Operate the pump as in step 4 above - many times the pump will be capable of self priming. If it does

not begin to pump fluid, remove the discharge valve assembly. Carefully fill the reagent head through

the discharge valve port with process (or compatible) liquid, and then reinstall the check valve.

6. Start the pump at the 0% stroke length setting and slowly increase the setting to 100% to prime the

pump. If this does not work, it will be necessary to fill the suction line.

7. Filling of the suction line will necessitate the use of a foot valve or similar device at the end of the

suction line so that liquid can be maintained above the reservoir level. Remove the suction valve

assembly, fill the line with fluid, replace the suction valve, then remove the discharge valve assembly

and fill the reagent head as described in Step 5 above. The pump will now self-prime when started up

per step 6 above.

Use appropriate precautions if handling process fluid. Ensure that any other fluid used for

priming is compatible with the product that will be pumped.

Figure 7: System Configured for Self-Priming

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Pulsafeeder Pulsa GLM DM1-6 User Manual Page 10