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DOPAK Sample Containers

 

DOPAK® offers two types of sample containers namely bottles, sealed with cap and septum and cylinders. The type of container used is of influence on the type of sampling system.

 

Sampling in bottles


A sample is drawn from the process and arrives at atmospheric pressure in the sample container. The container consists of a bottle, sealed with cap and septum which is inserted into the sleeve until the septum is pierced by the needles extending from the needle assembly.
Once in position, the product can flow into the sample bottle via de process needle while air and gases are being vented by the vent needle. When the required amount has been taken, the operator stops the product flow and the bottle is pulled out of the sleeve. The septum reseals automatically.

 

Sampling in cylinders  

 

A sample is drawn from the process and arrives at process pressure in the sample container. The container consists of a cylinder, at both ends equipped with a needle valve and a quick connect coupling. The cylinder is connected to the sampler.

Once in position, the product can flow through the sample cylinder. When sampling liquefied gases, a fixed amount of liquid is transferred to the expansion chamber to ensure partial filling of the cylinder. The operator closes the needle valves on the sample cylinder and allows the quick connect to be depressurised to a vent connection. The cylinder may be then disconnected from the sampler.

 

 

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