| How do you determine the right pressure for your application? |
| You need to consider the working surface, what you are trying
to remove, apply or inject and the time required to complete the
task. Some substances need high pressure to break the adhesion to the surface, while others require less pressure but more flow to accomplish the task quickly without damage
to the surface. It is best to review your application with other experts in the field and to try a small sample test before investing heavily in equipment. Our chart of typical applications at selected pressures will give you a general guide for a variety of applications. |
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| Is PSI more important than GPM? |
| Sometimes GPM is more important than PSI and other times PSI is more important that GPM. It depends upon the type of task, the amount of time you have to complete it and the costs you want to incur. Higher flow and moderate pressure is generally considered the best for all purpose cleaning [cars, mowers, decks, houses, siding, driveways, boats etc] Adding additional pressure will allow specialty cleaning such as removing paint or rust, spraying long distances, wet sandblasting and hydroblasting. Adding additional flow will get the job done faster, if you are working with large areas. As the task gets more specific, sample testing at various flows and pressures or recommendations from cleaning specialists will provide you the best end result. |
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| Why can't I get any pressure from my pump? |
| There are many reasons why your pump might not be delivering sufficient discharge pressure. Standard seal and valve maintenance is highlighted under SERVICE on our web site and also under Diagnosis in each Pump Service Manual. Sometimes air gets trapped in the line and it will prevent adequate flow through the pump that will prevent normal pressure. You will need to disconnect the discharge plumbing and let the water run through the pump to purge the air. You also might have a stuck valve. Since the valves require 100 PSI to open and close properly, you may need to use a garden hose to feed the inlet to open the valves and bleed the pump. Your specific positive displacement pump model only delivers a given amount of liquid [flow] based upon the RPM at which it is operating. Pressure is created by the downstream restriction placed upon that flow. Worn o-rings and seals in regulating valves, worn nozzles, undersized lines, clogged filters, chemical injectors and other system accessories can affect the system performance and discharge pressure. All system accessories should be inspected and serviced when pump seals and valves are replaced. |
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