Centrifugal Pumps With 17-Inch Impeller Ideal for Storage Terminal Applications

In addition, the 811 ANSI Series pumps meet the needs of terminal operators because they feature open impellers with two times the wear area of a closed design, which optimizes the performance of the pump’s open impeller and allows renewable performance. This open-impeller design feature also minimizes concentrated wear by balancing the hydraulic axial thrust load and reducing the stuffing-box pressure. This not only facilitates corrosive, abrasive, solid and stringy-fiber handling, but also simplifies maintenance, extends pump life and reduces repair costs.

Since casings of the 811 Series pumps can be constructed of a wide choice of materials, including ductile iron, 316 stainless steel, CD4MCu and alloy 20, they are able to meet a wide array of transfer applications found within storage terminal operations, such as petroleum, biofuels, chemicals and vegetable oils, to name a few. They are constructed through investment and no-bake casting processes to ensure smooth, precise, superior finished that guarantee consistent, reliable performance. Griswold also employs metallurgists to strictly supervise all heat-treating operations so that maximum corrosion-resistance for all alloys is ensured.

Other features of the 811 ANSI Series are self-tightening impellers that reduce leaks and failures; the ability to externally adjust the clearance so that peak efficiency is ensured even after wear-area loss; back pump-out vanes that reduce pressure on the shaft seal and reduce thrust loads on the bearings; and investment-cast impellers that are ultra-smooth to guarantee hydraulic and mechanical balance, and maximized seal and bearing life.