What pump type is needed to return to high water pressure after step down?
High rise office building. Stepping down pressure in a high pressure condenser loop to protect control equipment. Need pump to return to high pressure. Recommendations for step down regulator and subsequent pump?
The pump must be sized to the lift or head. How far to the highest point of the loop? What is the design volume of the system? Most condenser loops use centrifugal pumps.
The Regulator must be sized for the highest volume expected for the equipment being cooled. You will also need to understand the wetted surface requirements of the cooling tower, it may be necessary to use a bypass if this is the only unit on this loop.
You might want to look at another design for your system, like changing out controls to handle the head pressure of the existing loop, or if this is the only unit needing lower pressure on this loop install a secondary loop with a heat ex-changer.
I hope this gives you some ideas.