Pressure Pot Dispensing

An anti-drip feature is often incorporated using a vacuum to hold back the adhesive whilst the system is idle. Other features include digital pressure control and low-level monitoring of the fluid in the syringe. 

Normally a dispensing system consists of a tank, a dispensing valve and a control console. They require only a pneumatic line or nitrogen bottle to provide the 

The type of pressurised tank is determined by the adhesive viscosity. The following types of tanks can be found, among others  

For very-low-viscosity adhesives and for some activators or primers a gravity-fed system is often used. 

Fiigher viscosity products are typically packaged in cartridges to facilitate dispensing with hand guns and for semi-automatic dispense systems, pressure is applied to the 

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For those products having a low viscosity, less than 30,000 centipoise, it is possible to apply them by means of a pressure pot and some type of valve and nozzle. Pressure vessels for this purpose range from the small devices generally sold for materials such as cyanoacrylates up to paint-type pressure pots of several gallons. Dispensing valves can be manually operated or in some cases electric or air-operated automatic valves can be employed. Air spray guns, both manual and automatic, can sometimes be adapted for this use. A suitable fluid tip size is selected and the gun is used without the atomization air cap or air supply. This provides a convenient, inexpensive flow gun for use with products that do not require fluid pressures above the working pressure of the spray gun. 

The cure method of the adhesive very often dictates the type of dispensing equipment to be used. Cyanoacrylates are extremely sensitive to moisture and so a clean dry air supply to the pressure pot is essential to ensure the adhesive does not thicken in the pot. 

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