Priming the pump

A few strokes of the piston in a dry liner may ruin the liner. When the pump does not fill by gravity or when the cylinders have been emptied by standing too long or by replacement of the piston and liner, it is essential to prime the pump through the suction valve cap openings. 

Patients prescribed intranasal steroids should be instructed to shake the product gently before each use and prime the pump before the first use or if not used for more than 1 week. Clear nasal passages before use, and avoid nose blowing for 10 to 15 minutes after use. Rare cases of septal perforation have been reported therefore, administration of the spray away from the septum should be stressed. Effects are not immediate, and regular use is... 

An air pocket in the pump can cause low or no pressure or flow, erratic pressure, and changes in retention time data. It may be necessary to bleed air from the pump or prime the pump according to system startup procedures. Air pockets in the column will mean decreased contact with the stationary phase and thus shorter retention times and decreased resolution. Tailing and peak splitting on the chromatogram may also occur due to air in the column. Air bubbles in the detector flow cell are usually manifested on... 

Prime the pump, rinse the column with strong solvent, and equilibrate column. 

Prime the pump and rinse the column with a strong solvent before sample analysis. 

Spray Shake well. Begin initial use by holding spray upright directly over the wound, and prime the pump 6 to 8 times. 

Prime the pump with 4 sprays or until a fine mist appears before using the nasal spray the first time. Tkfter the first use and if the pump hasn t been used for 3 or more days, prime the pump with 2 sprays or until a fine mist appears... 

Not self-priming the pump must be started with the housing full of fluid and free of air... 

I have been growing two salvia plants for a few weeks now. [Props out to my righteous benefactor, who will remain nameless for reasons of National Security.] I could have tried some leaves before this, but I felt that I needed to earn the experience by cultivating and caring for the plant myself. Last week I tried a single leaf, to introduce myself. It was just a threshold dose, but I sensed the power that lay in these leaves. This time I had primed the pump with another, less exotic green ally before raising the bowl of salvia to my lips. 

Crack open the case vent to fill the case with liquid. This is called priming the pump. ... 

The problem with priming the pump shown in Fig. 25.8 is that the water needed to fill the pump s case (i.e., to prime the pump) is below the pump itself. 

The observed lag phase of activity, seen in Figure C4.2.2, is variable in duration and may not be noticed. The lag is generally thought to be due to the time required to convert inactive native Fe2+-LOX into active Fe3+-LOX. Thus, some amount of fatty acid hydroperoxide product is required to prime the pump. As a consequence, relatively long lag phases are often due to either low LOX concentrations, highly purified substrates containing no hydroperoxides from autoxidation, or both. 

The next step is to use compression fittings to hook the pump outlet to the flush valve with a length of 0.02-in i.d. tubing. The flush valve is a small needle valve used to prime the pump that allows us to divert solvent away from the column when rapidly flushing the pump to atmospheric pressure. Open the valve and the line is vented to the atmosphere. This removes the back-pressure from the column, a major obstacle when trying to push solvent into a plumbed system. 

Treatment 1 Open a purge valve. Prime the pump with degassed solvent. 

Prime the pump and begin flowing at 1 ml/min. into an appropriate collection vessel. 

Using flask A (which contains the remainder of the 200 mL of water) as a reservoir, prime the pump and let the system run at 2.0 mL/min while the sample is being prepared. 

This is tested by reference to the number of shots required to initially prime the pump, and the loss of prime during a typical user test (i.e., the pump should not require repriming during normal daily use). If the product is only used intermittently, then repriming may be required. 

This is calculated taking into account the label claim (number of doses), the upper limit of dose delivered for each actuation, the number of shots required to prime the pump, the moisture loss through the pack life and the residual volume (ullage) remaining in the bottle at the end of life (affected, for example, by the positioning of the dip tube relative to the bottom of the bottle). 

Always prime the pump if it has not been used recently or solvent bottles are changed. 

Prime the pump. This is done by attaching a 10 mL syringe with a screw-type tip to the sinker tubing to the screw end of the white plastic tubing just cleaned out. 

We had talked about safety, certainly," says the doctor, "but we didn t look at every single thing we did and ask, Is this the safest way we can do it There was a mental shift after the accident, where we started to look at everything we do in order to minimize risk. And we realized we have to assume there will be human error—just priming the pump is a seventy-step process."... 

The group began with building the protocols and checklists for processes they thought were the most dangerous, like priming the pump. In the end, they built checklists for every process associated with ECMO. 

The initiator assodated with service clarified water is modded by inadvertent serrice clarified water addition to the D E canal or the MB. Service clarified water is supplied to the filter feed pumps in ord r to prime the pumps prior to bdng place on-line. Inadvertent addition to the basin may occur if the service clarified water supply to the filter feed pump remains open following filtration system start-up or if the manual valves supplying s vice clarified water to the punq>s fail... 

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