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  1. Elb.ab

    Bolt design for noncircular shaped flange with circular bore

    Thank you again for your answer. I see, I don't know if it makes sense under appendix Y. The purpose of my calculation is to determine the forces on the bolts and for this I was asked to add the reaction force HR
  2. Elb.ab

    Bolt design for noncircular shaped flange with circular bore

    Hello, Thank you for your help. If I m getting it right UG-34 is used to determine the minimum thickness. hen I use Apx 2-10 I get a diameter A smaller than C (cf. Picture). Does this make sense...
  3. Elb.ab

    Bolt design for noncircular shaped flange with circular bore

    Hello everyone, I m working on a project where I need to validate the bolts for a flanged connection (pixture attached). My calculation wasn't validated as I have contact both inside and outside the bolt circle and I was asked to take into account the reaction force (HR) resulting from that...
  4. Elb.ab

    Teamcenter automation

    Hello, I would like to know if there is any way to automate some tasks in Teamcenter using VBA or Python?: To explain the context: I prepare many calculation notes(PDF) for hydraulic valves (CAD present in Teamceter) and I want to associate them with the drawings (in Teamcenter): - After...
  5. Elb.ab

    Flange bolts ( Contact metal-metal both inside and outside the circle)

    Hello Guys I am working on a project where I need to check the bolts of a flange/cover assembly. My flanges has a contact metal metal both inside and outside the bolt circle. so I need to take into account the reaction force (HR) at the outside diameter of their contact metal-metal. I have...
  6. Elb.ab

    Shear tube cutting

    Thank you all for your answers. We are now using T6 as a replacement to T9: I don't have the value of hardness of T9, but it seems to be harder than T6. T9 also has both tensile strength and yield stress bigger than T6 ( the range of 2XX to 300 MPa vs 3XX to 4XX). Moreover, the elongation (...
  7. Elb.ab

    Shear tube cutting

    Hello, I would like to have some guidance concerning a little subject that i'm treating. We're using a machine to cut some aluminum tubes ( through shearing). Recently, due a change in the material ( still aluminum), some small cracks are developed on the surface sheared. I understand that the...
  8. Elb.ab

    Compressor in AC system

    Hello! I have a question concerning the compressors used in recovery machine. I read that those machine can pump out liquid refrigerant. Won't this affect the compressor? Thank you
  9. Elb.ab

    Pump for liquid AC charging

    Thank you for your help. I've checked in HERMITIC, they have these kind of pump except that they work at high flow (12-50 m^3/h), I'm looking for smaller flow range ( 0-0.4 m^3/h) (0.1 l/s).
  10. Elb.ab

    Pump for liquid AC charging

    Hello guys I'm working on a test bench where i need to charge a refrigerant into the ac unit. I m trying to charge it with liquid and at high flow (100g/s). are there pumps used specifically for refrigerant (R134a)? Thank you.
  11. Elb.ab

    Liquid charging AC system

    Thank you for your answer. I'm not using a compressor ( i have just a bench test which i intend to charge at liquid at high pressure). My second question, say if that i heat my tank ( thus increase the pressure ) I will get more vapor or the contrary? Thank you again
  12. Elb.ab

    Liquid charging AC system

    Hello guys! I have a question concerning charging AC system of a car. From what I read, we generally use the low pressure side to inject the refrigerant in the vapour gaz. I also read that we can charge in liquid by putting the tank upside down. Do you have any idea how liquid charge can be...
  13. Elb.ab

    Air conditioning system (car)

    So is it the expansion valve that sets the pressure of suction and discharge?
  14. Elb.ab

    Air conditioning system (car)

    Hi guys. I have a question concerning how to size a compressor for an AC system. I've done some thermodynamics before. We worked on th fluid diagram where we precise the temperature of condensation and evaporation, which leads us to determine the work done by thre compressor and thus the energy...
  15. Elb.ab

    PRV selection.

    Hello I'm looking for a pressure relif valve that can be regulated manualy or electronically in the range of 0 to 10 bars ( water or oils) I found some PRV but they were absolutely designed for high pressure. DO you have some suggestions on where i can find those PRV Thak you for your time.
  16. Elb.ab

    Bench test: Check valve

    Hello. I'm working on a bench test to test check valves. My first idea was to connect the pump directly to the check valve. But this doesn't seem a good idea seeing that i want be able to control the flow ( the pump will continue turning until the pressure reches the value to which the check...
  17. Elb.ab

    Back pressure valve

    Thank you for your answer. So from whay you said. it's a variable restriction changing flow to maintain to inlet pressure. Does the formula for flow in function of drop pressure apply to it? : ( Q=C.S.sqrt(drop pressure/density))) . Thank you again
  18. Elb.ab

    Back pressure valve

    Hello, I'm new here in this forum, and i find it amazing I'm working on a bench test for testing check valves. I found some examples of this test where a back pressure is used at the outlet ( to the tank). I don't really understand what a back pressure valve does. Does it help maintain the...

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