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2018

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08

Pulse damper selection method

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Pulse dampers are widely used in metering pump (dosing pump) pipeline systems and can be roughly divided into three forms: air chamber pulse dampers, diaphragm pulse dampers and air bag pulse dampers. Their selection It differs because of its own structural characteristics and buffering effects.

Pulse dampers are widely used in metering pump (dosing pump) pipeline systems and can be roughly divided into three forms: air chamber pulse dampers, diaphragm pulse dampers and air bag pulse dampers. Their selection It differs because of its own structural characteristics and buffering effects.
 
1. Air pulse damper
The air pulse damper is like adding a Coke can with a pressure gauge to the pipeline. The liquid has a buffering effect by directly compressing the air inside, but its bigger disadvantage is that the air in the damper will gradually Dissolves into the medium, resulting in less and less compressible air volume, and less and less buffering effect. It is necessary to remove the damper from the equipment and reconnect it to the atmosphere to ensure the air volume inside. , so it is a little more troublesome to maintain during use, but its cost is relatively low, so it is suitable for systems that do not have too high buffering requirements. The selection method of air pulse damper is to multiply the volume per stroke (in milliliters) by 26, which is the minimum volume that can reduce the pulse by 90%.
 
2. Diaphragm pulse damper
The diaphragm pulse damper is divided into upper and lower shells, separated by a diaphragm made of fluorine plastic in the middle. Its buffering effect is much better than that of the air chamber type. The biggest advantage is that the prefilled gas and the liquid in the pipeline are Separate, more convenient for maintenance. The maximum pressure resistance of the diaphragm pulse damper produced by our company is 1.0MPa made of PVC and 2.5MPa made of stainless steel. The selection method of diaphragm pulse damper is Multiply the volume per stroke (in milliliters) by 10 to get the minimum volume that will reduce the pulse by 90%.
 
3. Air bag pulse damper
The biggest advantage of the airbag pulse damper is that it can withstand higher pressure (the airbag pulse damper produced by our company has a maximum pressure resistance of 31.5MPa). Its structure is to add an airbag in the air tank, and the airbag is filled with Gas at a certain pressure is in the pipeline, and the liquid in the pipeline compresses the airbag. The airbag contracts and then expands, thereby achieving a buffering effect. However, the cost of airbag pulse dampers is generally high, and the production cycle of airbags made of special materials is relatively long. The selection method is to multiply the volume per stroke (in milliliters) by 10 to get the minimum volume that can reduce the pulse by 90%.