Pulsafeeder Pulsa Series 680 EN User Manual download pdf (Page 11)

3.3 Start-up

Since the hydraulic oil system is primed at the factory, priming the process system is all that should be

necessary to produce flow. If the hydraulic system has inadvertently been dumped due to start up with

restricted suction or discharge conditions or improper adjustments to compensator or bleed valves, repriming

procedures under the maintenance section may have to be followed before pump calibration can begin.

3.4 Priming Process Head

1. Open the suction line and discharge line shut off valves.

2. If the piping system design and the storage tank are such that the product flows by gravity to the pump,

no priming is required. If however, the discharge line is under pressure, air will be trapped in the process

head and it will be necessary to remove the discharge pressure to enable the pump to prime itself.

3. If the pump must handle a suction lift, it may be necessary to manually prime the reagent head. Remove

the discharge valve by unscrewing the two tie bar bolts and then lifting the valve out. Fill the head with

process fluid, or a compatible liquid, then replace the valve in the same position and retighten the tie bar

bolts.

4. The pump is now ready for start-up.

5. Start the pump and increase the control setting to full stroke.

6. Make a brief check to assure that the pump is producing the approximate flow desired at the full stroke

setting. Calibration should not be attempted on any model until it has run at least one hour to assure the

pump hydraulic and reagent head systems have stabilized.

Due to agitation of the PULSAlube oil when filling the reservoirs, minute air bubbles will have formed.

It takes at least one hour running time to dissipate the bubbles and develop a sound hydraulic system. In

some of the very low displacement models it may take up to eight hours running time to stabilize the

system and permit accurate calibration. This is generally limited to models with ¼” and 3/8” diameter

plungers.

If the pump does not produce the approximate flow desired at the full stroke setting refer the Trouble

Shooting Section for possible causes and refer to the Priming Procedure under the Operation and

Maintenance Section.

IOM-NMG-0804 – Rev E

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Pulsafeeder Pulsa Series 680 EN User Manual Page 11