Any of the machines outlined above can be built for Hazardous Location operation. Hazardous location means that there is risk of explosion or auto-ignition of the products being filled. Examples of products like this are alcohol, solvents, petroleum products, paints, etc.
Many of the manual and semi automatic versions of the types of bottle fillers discussed above are inherently safe since they require no electrical operating systems. However, more sophisticated and higher output automatic machines using electrical systems must be built with intrinsically safe enclosures that are UL listed and conform to the National Electric Code as well as requirements of major insurance carriers.
There are automatic bottle fillers offered in the market with completely pneumatically controlled operating systems. However, the major disadvantage of these systems include susceptibility to inconsistencies of plant air volume and pressure. In other words, there is risk that pneumatic logic controlled machines will not function repeatably. For this reason, hazardous location bottle fillers using electrically safe systems are prefereable because they can offer all the consistency, convenience, and efficiency of conventional fillers including full visual displays and user friendly controls.