Two Stage Two Stage Pumps LSP two stage pump We manufacture two ranges of two stage pumps, the HZZ for API duties and the LSP / LST for pulp and paper + other general applications. Within these two basic designs there is a wide range of standard options to enable the pumps to be tailored to fit individual customer requirements. No mater what your application you are sure to find a Sulzer two stage pump that meets your requirements. BBT/BBT-D BBT/BBT-D These API 610 BB2 back-to-back two stage pumps are designed for process applications in refineries and petrochemical plants. The design features large seal chambers able to accommodate API 682 seals. Standard options include coke crusher inserts to provide extended service life in abrasive applications. More LSP / LST LSP/LST These low speed high pressure pumps are especially designed for continuous digester feed in the pulp and paper industry. The pump has a two-stage, end suction, horizontally mounted back pull-out design for hot, abrasive and corrosive liquids. More