Stone (SPX) Stone interchangeable, integrated hydraulic systems offers an efficient alternative to more complex and costly hydraulic applications. The Stone pick-a-pack concept offers flexible application solutions serving many industries across the globe. The KC Series of Pick-a-Pack integral valves are extremely important in that they limit the amount of pressure the power unit can generate. Stone pumps can generate in excess of 5000 psi. If this pressure is not limited by the use of relief valves, the excess pressure could potentially damage the mechanical components used in the hydraulic circuit. 19 results for spx stone pump Save spx stone pump to get e-mail alerts and updates on your eBay Feed. Unfollow spx stone pump to stop getting updates on your eBay Feed. SPX Corporation is a supplier of highly engineered products and technologies, holding leadership positions in the HVAC, detection and measurement, and engineered solutions markets. Based in Charlotte, North Carolina, SPX Corporation had approximately $1.4 billion in annual revenue in 2018 and approximately 4,000 employees in 17 countries. Find many great new & used options and get the best deals for SPX Stone/fenner 12vdc Double Acting Hydraulic Power Unit Pump Dump Trailer Lift at the best online prices at eBay! Free shipping for many products!