Vertical turbine pumps used in re-pressurization of oil fields pump produced water at high pressure up to approximately 4500 psi. Because this water is sometimes very corrosive, stainless steel bowl assemblies are commonly used. There is an application in which no water will show up at the surface and pressure is throttled off below the surface back to the water supply. This method can be used when pumping from atmospheric or vented bodies of liquids. Pumping Raw Stock and Product Most pumps that transport product or raw stock in the petrochemical field are built to API 610.
Many users also add their own custom requirements.
In general, the specifications are tight and extra attention must be paid to the pump's proper design and fabrication. Sealing and bearing clearance specifications also must be followed closely. The mechanical seal configuration depends on the product pumped, and in many cases must adhere to strict environmental protection rules. Most of these pumps have motor drives with thrust bearings in the motor, although some requirements call for the European style thrust bearing in the pump. The reason for the latter is better mechanical seal maintenance with less run-out.