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Our pump is a barrel type and has all the impellers facing one direction using diffusers as you say. I see exactly your point as there can be no geometrical change in the areas inside the pump that are used for balancing by moving the axial position. This is why we were struggling with the...

We ran across a note from a report in 2000 when this same problem occurred only an order of magnitude more severe. It says "Depending how many impellers are set toward suction or discharge may effect the direction that the rotor will want to thust. One of the things that can influence the...

Since the material failed in fracture i.e. no indication of yielding, it can be classified as brittle. (It may be wise to find the brinell hardness and determine this absolutely) Therefore you can apply some failure theories to find the stress at which the beam fractured. Brittle materials...

Pump model: Pacific RLIJ 2 1/2 Service conditions: normal operation is 120gpm, 100F water. Motor is 900hp, 1800RPM with a 2.7368:1 speed increaser (shaft at 4900RPM). The pump is normally operated back on the curve. We have John Crane Mechanical Bellows 1-B seals on each end of the pump. The...

My plant has three multistage (eleven) centrifugal Pacific (Flowserve) pumps that are used to inject water at ~2800psi. The pump has a pressure reducing bushing, no balancing disk. One of the pumps has always run hotter on the outboard kingsbury thrust shoes. We would like to change this. If I...