Rugged BSK pumps feature wetted materials in 316 Stainless Steel, Aluminum, Cast Iron, Polypropylene, Acetal, PVDF, PTFE, and seven internal elastomer options to exceed your most demanding application requirements. Whether you're pumping caustic acid, a hydrocarbon, or even a powder, When it comes to extracting minerals and metals from the earth, BSK has the pumping technology required to meet your dewatering and transfer needs. Under the harshest conditions, BSK diaphragm pumps have built a reputation for being the most reliable and durable pump in the market. All BSK diaphragm pumps feature a completely non-lubricated air valve, bolted construction and maintenance friendly design.