Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. bk19702

    Mechanical seal Leak problem

    Was your Plan 53B piped to the proper connections? The gland bushing is the last item in the seal designed to mitigate the amount of leakage to the atmosphere should the outer seal fail. If you are suggesting you had 12 barg in this cavity between the outer seal and gland throttle bushing, then...
  2. bk19702

    Carbon Blistering

    Moving the carbon to the stationary would not alleviate the issue - the blistering is a result of viscous shear at the interface; it's independant of the actual velocity profile of the face itself. There still would be the shearing effect even if the face was stationary. This problem can be...
  3. bk19702

    API seal plan to vertical pumps

    Dual pressurized seals in sour crude is not uncommon - Plan 13/53A or B would be typical. I would not use Plan 52 unless you want to repeatedly clean out your seal pot.
  4. bk19702

    Mechanical Seal Hydro test vs Pneumatic Test Vs complete pump Hydro Test

    Air leak test is what I was referring to - that is what is referenced in API 682.
  5. bk19702

    Mechanical Seal Hydro test vs Pneumatic Test Vs complete pump Hydro Test

    The integrity could be verified if you detect any leaks during the initial pressurization. You can verify the seal integrity once the seal is installed in the pump by pressurizing the pump casing with air, isolating, and monitoring for loss of pressure (mounting a pressure gauge on the casing or...
  6. bk19702

    Mechanical Seal Hydro test vs Pneumatic Test Vs complete pump Hydro Test

    The air test for the seal is what API 682 will reference - that test is meant as an integrity check of the cartridge assembly, making sure no o-rings were cut during assembly, faces cracked, etc. It is not meant to provide an indication of the performance of the seal in service under the...
  7. bk19702

    api plan 23 seal piping

    No worries.
  8. bk19702

    Graduating with barely a 3.0 GPA from a top university- should I worry?

    Leave the GPA off of the resume - as Ron mentioned, what really matters is that you actually have the degree, and the fact that you have a MS from Georgia Tech speaks volumes in it's own right. You really want to focus on your interviews and hopefully you have some tangible experience you can...
  9. bk19702

    api plan 23 seal piping

    Perfluoroelastomer is not Viton. If you see Fluorocarbon, or FKM associated with the o-rings, that is referring to Viton.
  10. bk19702

    api plan 23 seal piping

    How is the cooler mounted - horizontally or vertically? If it's vertically mounted, then both the supply and return could be easily vented at their highest point. If it's a horizontal mount, then you really have to make sure you blow down both sides of the circuit (and that you have the valving...
  11. bk19702

    How to make a great first impression?

    I can't stress enough that portraying confidence without being cocky is golden in a young engineer as I see it. Most I have come across nowadays have an unbelieveable sense of entitlement and know-it-all attitude that I would never think of having when I finished school, and that was only 12...
  12. bk19702

    Modification of plan 53 C to plan 52

    Have you considered how to lubricate the primary seal when changing to plan 52? You'll need to take this into consideration assuming you plan on using the process fluid as the primary seal lubricant. As Flexibox mentioned, the advantage of the pressurized seal is that both the priamry and...
  13. bk19702

    Plan 72/76 Support For Dry-Running Secondary Seal in Hydrocarbon Service

    A typical starting point for the N2 purge rate is 0.5 to 0.6 SCFM, which relates to a flow rate for a 5 PSIG differential pressure across a 0.062" orifice. You can adjust the rate up or down depending on application specifics. Typically, Plan 72 is more flow based as it is being introduced to...
  14. bk19702

    Best Mech. seal solution for Thermic Oil, 300¦C

    A single seal with a steam quench will have connections on the gland in addition to a throttle bushing; the steam will get injected between the seal faces and the throttle bushing through an inlet, then drain freely through the second connection in this area (one will be labeled 'quench' or 'Q'...
  15. bk19702

    Best Mech. seal solution for Thermic Oil, 300¦C

    If the water vaporizies upon entering the seal gland, the change from liquid to vapor instantaneously occurs right beneath the seal faces - you will pop the faces open as a result or worse if the reaction is violent enough. As stated - hot, dry steam or N2 are the only acceptable quench mediums...
  16. bk19702

    What is recommended practice for venting the SC in a gas seal design?

    Preferably upstream - you want to take the vent as far away from the pump as you can. It depends on how you piping is installed and what would be accessible for tie in.
  17. bk19702

    HOW TO CALCULATE THE PROVIDED FLOW BY A PUMPING RING

    There are many variables to consider as Flexibox already stated. Elevation, tubing size, restrictions in the circuit, gland porting, location of the ports, size of the ports, pumping ring type (axial or radial flow), shaft speed, etc. Are you trying to modify an existing seal design? I would...
  18. bk19702

    API Seal Flush Plan 11 + 61

    You need to make sure all the seal materials are compatible with the acid (faces, o-rings, metallurgy, etc). I would at minimum have the wetted metal components made from Alloy 20. The seal may leak, it may not leak; it depends on many factors. However, with a single seal, if you do suffer a...
  19. bk19702

    What is recommended practice for venting the SC in a gas seal design?

    You are correct in that the preferred method is to take a line from the seal chamber back to a suction riser or vapor space. I have run gas seals on vertical in-line caustic pumps where each seal chamber had a circ line back to the caustic tank for N2 venting. In that case I took things one step...
  20. bk19702

    How to dimension the seal pot for a double seal in a installation?

    Doesn't appear to be a pumping ring installed from the drawing you have attached. I could not even begin to speculate on the cooling flow required by the seal since there is no information provided about the seal; no shaft speed, no process information, nothing. I seem to keep repeating this...

Part and Inventory Search

Back
Top