Mefi01,
You should share all the data you provided to the pump vendor who recommended the pumps for you. So, we knew better what's the design conditions for your project.
I thought the data should include more requirement than just ANSI #300 pressure rating. On the other hand, if this vendor proposed a pump with only the pressure rating info, you should look for other vendors who can ask for the adequate questions in order for recommending a right pump for the project.