Has anyone experienced a phenomenon where their pumped fluid vaporises and condenses again, but does not actually cavitate.
If so, what failures do you experience? What findings do you make on your pump internals (particularly your seals)? Etc.
Good day All
We have a Sundyne LMV-322 pump with a Plan 53B seal system, operating in HF Alkylation service (product is a combination of propane, butane & HF acid). This set of pumps are our refinery's number 1 & 2 bad actors. We experience a high-frequency of failures on these pumps will...
Due to various reasons, our rod-drop measuring capabilities are not available. What would be the best way of tracking piston & rider ring wear for a study? Some have suggested using a feeler gauge to measure the top clearances but this only gives you the sizes of the outermost (crack-end) rings...
What is the impact (or consequence) of installing a pair of angular contact bearings (e.g. 7310BG) in a Face-to-Face orientation, vs. a Back-to-Back orientation?
Similarly, what are the benefits & disadvantages of each configuration?
How do equipment manufacturers determine the journal bearing clearances for their pumps, compressors, etc.?
Is there a rule-of-thumb for determining the optimal bearing clearances (metric)?
Do manufacturers use 'hyper-theoretical' means of determining these clearances? By this, I mean, do they...
For those operating low flow, high pressure water injection pumps in crude oil refineries, can you please share with us:
1. What type of pump you are using (i.e. type, manufacturer, model)
2. Differential Head, Suction Head and Flow Rate
3. Average MTBF achieved
I am operating a reduced crude...
Problem Statement: The pump (shown in the crude sketch attached) is a basic overhung, centrifugal pump which is required to pump out salt water from a pond (at approximately 20 m3/h). Due to the suction line extending over the bund wall to enter the pond, there is an accumulation of air in the...
Does a recip compressor (which takes suction from a header and discharges into a header) maintain a fixed differential pressure across the cylinder if the speed of the machine and suction temperature of the gas remain constant?
Or does the compressor react to the pressure of the discharge...
I have a few questions regarding impeller trimming:
1. Many end-users attempt to use trimming of impellers as a strategy to reduce throttling the pump due to the pump being oversized. By reducing the impeller diameter, the efficiency of the pump is also reduced. Can this strategy of trimming...
I have a vertically-submerged 5-stage centrifugal pump that suddenly yielded reduced head (and therefore reduced capacity). The pump had a normal operating differential head of 22.5 bar at a flow of 80 m3/h, but the pump was delivering only around 20 bar diff head and a flow of around 60m3/h...
Hi, All
I've done numerous system curves but the impact of control valves always gives me hassles.
When developing a system curve, how do you incorporate the consideration/impact of a control valve? To me, the head loss across a control valve is a function of both % plug extension/travel and...
At my refinery, we have an immense struggle with positive displacement, high pressure water injection pumps. We use diaphragm and plunger pumps predominantly, and they are exceptionally unreliable and incredibly difficult to execute quality maintenance on. We have one particular triplex...
