DEF Dispensing System - A Component for Maintaining DEF Quality
A critical system which is used for maintaining DEF quality is the dispensing system. For diesel exhaust fluid there are two vital types of dispensing systems.
1. Open dispensing system
2. Closed dispensing system
Pros and Cons of Open dispensing system
In an open system the DEF container is not sealed from external contaminants at the time of one or more usage. For instance, during filling, dispensing, transporting or disposal the system is not sealed. In a typical open DEF dispensing system, you will find a drum pump installed along with a stinger or stick type dip tube.
Pro: It is a reusable system thus does not add much cost to the container package. Well if along with the container stinger is also shipped then this solution becomes quite expensive thus only suitable for reusable applications.
Con: In this type of system you will find an unfiltered venting path open to environment and on the other had dispensing provide a likely potential source of DEF contamination. You should also keep in mind that at the time of container changing the stinger must be removed. This task is cumbersome, messy and opens a way for the DEF to be contaminated. Initially this system cost high.
Closed dispensing system
In a closed dispensing system, during the transport, dispensing and disposal phase of the container life cycle the container is sealed. In a typical closed system you can see a dip-tube or drum inserted at the DEF packaging facility. Till the end user facility the dip tube travels along with the container. Then to fulfill the dispensing purpose a coupler or dispense head is connected on site to the dip tube. You should also use a camlock coupling to make the fitting airtight.
To keep it completely tight, a filtered venting port need to be incorporated to the coupler as to protect it from airborne particles from entering the container at the time of dispensing. This also allows the fumes to escape in the environment.
Thus these are the two main types of DEF dispensing equipment. Now depending on your usability you can choose the one benefiting you. But before going for anyone you should have complete details about it. Having good knowledge will help you to operate it wisely and also your thing would not be damaged. This is because operating anything without its complete knowledge may lead to damage which may cost you high. So now it depends which is perfect as per your requirement.
