The S Series line of self-priming double-ended positive-displacement pumps (photo) includes twin- and triple-screw designs that provide complete axial balancing of the rotating screws. The pumps’ timing technologies eliminate metal-to-metal contact. S Series pumps are ATEX-certified for use in explosive or dangerous environments. The triple-screw models are specifically designed for handling clear, lubricating liquids without solid content. The twin-screw models are available with or without a non-timing gear transmission. The models with the non-timing gear transmission are suitable for handling higher-viscosity fluids, such as bitumen and residual oil, at medium or high temperatures. — Blackmer, Grand Rapids, Mich.
Twin- and triple-screw pumps for a variety of fluids
| By Chemical Engineering