Weir Specialty : Rotojet High Pressure Pitot Tube Pumps

High Pressure Pitot Tube Pumps.

The Roto-Jet is totally, hydraulically stable and can operate with a minimal continuous bypass flow at shutoff indefinitely and at any flow point throughout the total head curve range with no wearing or damaging effect to the pump. The reason for this unique benefit is that all radial forces tend to be balanced within the rotor, and axial thrust is solely a function of suction pressure. Radial and axial forces applied to the Roto-Jet are independent of flow rate. Thus, the pump can operate at design point to shut-off free of shaft deflection or added thrust load applied to the bearings.

Design Simplicity

A single stage pump with only two basic working parts; (1) a rotating case and (2) a stationary pitot tube. The pump has only one wearing, rubbing part and that is a mechanical seal that sees only suction pressure. Seal leakage due to seal failure vents to atmosphere. Mechanical Seal is isolated from the bearing pedestal, minimizing the risk of seal leakage from contaminating the bearings. With minor seal leakage, the Roto-Jet pump can be kept in service with a damaged seal to meet the critical demands of daily production.