This might be because the buyer has seen another manufacturer’s equipment being demonstrated
at an exhibition, but decides to buy from a different manufacturer without checking
the flow direction. It is very common for some buyers to be duped by unscrupulous
salesmen who skilfully gloss over the weaknesses of their products, but put strong
emphasis on their lower prices. When buyers are misled by such salesmen, they often
make even more, and sometimes catastrophic mistakes and consequently cause the demise
of their own companies.