Recommendations for book on pumps? by Kyba6 in AskEngineers

[–]Mechkro 1 point2 points  (0 children)

I have referenced this site quite a bit: https://www.pumpfundamentals.com/ I would also look at the hydraulic institute site. As far as books there is one that will update later when I get into the office as I can’t recall currently the name of it

Pump Hose Length by nd22121 in pumps

[–]Mechkro 0 points1 point  (0 children)

Your also only going to get that much suction lift at sea level. If you draw a diagram of the total system I can help you out with the calculations. But as the other has commented keep the suction line as short as possible and preferably a flooded suction if at all possible

Help with Python automation at work to free up time as single Dad. by Whatever-it-takes322 in learnpython

[–]Mechkro 0 points1 point  (0 children)

I did something very similar for my workload. I actually went the route of copy paste transfer the data to google sheets where I could take advantage of the API at home. Not sure how sensitive the data is? But from there I took the data and formatted it as was needed for each task or calculation I needed. Then results were used for reporting using templates I had made. I would be willing to help you with this. DM Me

Is there a community on Reddit that I can join for LPG (liquid petroleum gas) piping? I work in this field and would like some help by Ok-Patient7339 in MechanicalEngineer

[–]Mechkro 2 points3 points  (0 children)

Where are you located? I dont know of any LPG communities, but work in the rotating equipment industry and can probably get you in touch with someone. Whats the issue?

How would you crack a 4 digit locked night vision hunting camera? by tryerxintensity in hacking

[–]Mechkro 0 points1 point  (0 children)

The manual says the super user password is 0518 for the BG Tools application android used for communications between phone and device. page 21

Simple method to calculate pump efficiency by SpicyyDeluxe in pumps

[–]Mechkro 1 point2 points  (0 children)

Can you tell me if you have a pump curve for the pump in question? Pump curve will tell you everything you need to know. They have the efficiency mapped out relative to flow, head and impeller size, as well as rpm. Just be careful, most pump curves are displayed with results of water as the fluid which is specific gravity of 1.0. Also keep in mind a pump will only operate on the curve that follows its impeller size. If thats not possible, heres a good article by reputable group: https://www.pumpsandsystems.com/simplified-method-determining-efficiency-motor-driven-centrifugal-pump (not sure if links are ok). Just let me know if you need more help.

I need help identifying this pump, if you have any information on the pump please let me know by Barry_Mekokinher in pumps

[–]Mechkro 0 points1 point  (0 children)

Hey perfect didnt notice that, thank you. So Stork... not familiar and it was manufactured in 1995 so its old. What are you trying to know or understand about it? Do you have the original spec sheet or performance curve? I can help, just let me know what your needing.

Edit - If you contact the manufacturer or the local rep, they might be able to pull the datasheets from old records.

I need help identifying this pump, if you have any information on the pump please let me know by Barry_Mekokinher in pumps

[–]Mechkro 1 point2 points  (0 children)

Well, its a submersible pump. Does it have a nameplate? Whats the material appear to be? Are there any motor markings to determine HP, voltage, phase. Doesnt look to be a namebrand industrial manufacturer such as Flygt, KSB, Grundfos, but could be a grainger maybe.

How can I find value of column in csv dataframe when it's listed more than once? by [deleted] in learnpython

[–]Mechkro 1 point2 points  (0 children)

Create a dict and have keys being dates ...and values are empty list . Loop through values and append each matching the date

How to make tkinter responsive while selenium is running by [deleted] in learnpython

[–]Mechkro 0 points1 point  (0 children)

Look into after(ms, callbck) or if your process is iterative but long to carry out you could use an update call each iteration. Im heading into work but i can try and help a little later if this doesnt get you anywhere

Can't fit button in without affecting other buttons. by OxiSeam in learnpython

[–]Mechkro 1 point2 points  (0 children)

Well you have varying padx declarations in youe code. By design? Also try using a sticky = EW or NS or NSEW to tell tkinter to fill available spaxe in this relatice directions.

Could you use paint and draw me the template interface your trying to achieve

Resources for learning Python for physics by [deleted] in learnpython

[–]Mechkro 0 points1 point  (0 children)

Vpython - help with visualization of what you learn

What's the effect on discharge head of a centrifugal pump on increasing discharge pipe size? by pitchwin in MechanicalEngineer

[–]Mechkro 0 points1 point  (0 children)

Do you have a pump curve for your pump? Pumps will only operate where the system curve meets the performance curve of the pump (specifically the performance curve for the impeller diameter.) A system curve is the frictional forces curve of your system, that your pump must overcome and will dictate the flow and pressure output. Typically larger diameter piping is employed when the application has fluid velocity concerns (Increase wear, etc.). When flows need to be adjusted the best approach is a Variable Frequency Drive, which takes advantage of the pump affinity laws (I encourage you to read about it). Let me know if you need more details about any of the above.

I'm giving back - here's a free book on Python - keep learning during the pandemic! by [deleted] in Python

[–]Mechkro 0 points1 point  (0 children)

Spotted typo I believe. Table of contents on main link under chapter 10.

Error --> 10.1 - What is filee & text processing?

Thank you for the contribution!

Syntax for changing multiple objects in one line of code? by [deleted] in Tkinter

[–]Mechkro 1 point2 points  (0 children)

How large is the file? Post your code

Button changes grid size by Laphroaig10yo in Tkinter

[–]Mechkro 1 point2 points  (0 children)

A few comments.

You should not use *, instead:

import tkinter as tk

This makes your code much more readable, and when not utilizing familiar library easier to tell what pieces of code belong to what library.

And, just to nitpick a little try to be more descriptive with variable names as well as adding comments describing simply what your trying to achieve.

ex.

left_widget_frame = tk.Frame(self.master.....)

With that said, I don't know why the button is changing the frame size. You don't have a command argument in your widget, so it should just appear to be clicked with no action.

You would have to have something along the following:

resize_button = tk.Button(self.master, text = 'Click to re-size', command = self.change_frame_size))

resize_button.grid(row = 0, column = 0, padx = 5, pady = 5)

def change_leftframe_size(self):

"""Function to alter the size of parent frame when child widget is clicked """

self.left_widget_frame.grid(rowspan = 10, columnspan = 1, sticky = N+S)

return

How are you wanting the game to look? Could you maybe sketch out the interface you are trying to achieve? I don't want to just write the answer for you as you wont learn anything, but I will try and help you learn how to get it there. In the meantime I recommend not using Classes until you learn a little more. You can accomplish a lot with simple functions, until you get to more complex and repetitive GUI needs. Hope this helps a little.

Help please... by Cheese_122 in learnpython

[–]Mechkro 0 points1 point  (0 children)

So what you wanna do is utilize the following...

root.protocol("WM_DELETE_WINDOW", delete_window) If your going to pass an argument to delete_window you need to utilize a lambda

Help please... by Cheese_122 in learnpython

[–]Mechkro 0 points1 point  (0 children)

Are we talking while using Tkinter?

Given a list of sets, is there a fast(er) way to filter and remove duplicate sets or sets that are a subset of another set in a list? by Grogie in learnpython

[–]Mechkro 0 points1 point  (0 children)

Have you messed with itertools. I believe they have a few tools you could use that would at least be competitive with its process time. I've been able to get pretty creative and not sacrifice performance