API 610 - VS7 Pumps Double-casing volute vertically suspended pumps are referred to as pump type VS7. Finder have been manufacturing VS7 pumps for decades with numerous units in operation around the world. Series 1 Finder Pompe C2KV API 610 VS2 or VS7 double suction pumps for flows up to 3,000 m3/hr and TDHs of 170 m