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  1. Matador

    Flow calculation

    Yes it can be calculated, just visualize an elecrical circuit in parallel. The voltage drop across the branches is the same, in this case the pressure drop acroos each branch will be the same.
  2. Matador

    High ph Low Temp Valve Application

    I have an outdoor application (-30C) design that requires a valve to handle high ph leachate until the liquid freezes. The solid material that will be stored has a SG of ~1.2 and ph in the 12-13 range once dissolved. Rainfall will be the medium that dissolves the solid so the resulting ph will...
  3. Matador

    Stress At Hole in Plate

    The press cycles about 2300 times per day. Each bale is ~ 484 lbs & we produce ~ 550 ton per day. There is one hugh cylinder in the center which starts the initial compression. Once the initial compression is complete the other four cylinders assist to apply the final force to compress the bale...
  4. Matador

    Stress At Hole in Plate

    I'd say the plate deflection along the edge where the load is applied is ~ 1/8". The plate in question fails about every 9-12 months. There is a lot of potential for damage when one of these plates fails beacuase the load has to be applied with 3 cylinders instead of 4.
  5. Matador

    Stress At Hole in Plate

    The 2" thick plate is 14" wide x 15" long with a 6-5/16" dia hole in the center. The uniform loading is along the 14" wide sides. The nut for the superbolt in the center rests on a bearing plate (washer) which is approx 9" dia. The maintenance people have already upgraded the plate material...
  6. Matador

    Stress At Hole in Plate

    We have had several failures in our bale press and after some study the loading can be simplified as follows: Visualize a rectangular plate with a hole in the center. The plate is held down in the center by one nut (super bolt) in our case. There is uniform loading (not necessarily equal on...
  7. Matador

    Steam Valve Body Holes

    We don't have a copy of ASME B16.34 on site & I can't find any info on the web. Would you know what sort of NDT has to be performed after the alteration? Thanks in advance.
  8. Matador

    Steam Valve Body Holes

    I see ten inch 150# valves being modified and something doesn't seem correct but I have not been able to find anything in the code which says this can not be done. The ball valves are used as blow valves and the ball sticks with gummy material. They drill a hole in the side of the valve body...
  9. Matador

    SCFM vs ACFM

    I did read the threads and called the compressor supplier yesterday. The compressors in question were purchased from Sullair and what they call standard conditions are 14.5 psia, 68 F, and dry conditions which i assume to be 0 % RH. There is no mention of the altitude being at sea level. It...
  10. Matador

    SCFM vs ACFM

    Thanks for the formula Zekman. Would you substitute the atmospheric pressure associated with 1600 ft elevation instead of 14.7?
  11. Matador

    SCFM vs ACFM

    Can someone please give me some information on how to calculate the SCFM for a compressor? Flow - 1100 acfm Pressure - 100 psig Air Temp - 110 F Altitude - 1600 ft A formula and sample calculation would be great. Thanks in advance
  12. Matador

    Air Density Corrections

    Thank you Katmar, this is exactly what I needed.
  13. Matador

    Air Density Corrections

    Sorry for not being clear. Does anyone have a Excel spreadsheet or can you provide the formulas to determine the air densities at different temperatures and altitudes? This is a cooling tower application and the altitude is 1640 ft. My calculations revolve around temperatures in the 75F -...
  14. Matador

    Air Density Corrections

    Sorry but I don't want the density altitude. I want to be able to vary the inlet and outlet air properties for a cooling tower without interpolating for every value I choose. I don't need to know the density is the same as it would be at 4000 ft, then compare that to the outlet which could be...
  15. Matador

    Air Density Corrections

    I have not been able to find anything that doesn't require interpolation between the different values.
  16. Matador

    Air Density Corrections

    I'm looking for an Excel spreadsheet that gives me the air density at different temperatures and altitudes. The project involves a cooling tower heat load and the temperature range is from 75F - 115F at an altitude of 1640 ft Thanks in advance.
  17. Matador

    Air Density Values & Correction Factors

    Does anyone have a Excel spreadsheet or can you provide the formulas to determine the air densities at different temperatures and altitudes? This is a cooling tower application and the altitude is 1640 ft. My calculations revolve around temperatures in the 75F - 125F range. Any help will be...
  18. Matador

    Wind Load On Walls & Buildings

    I am doing some wind load calculations using the Canadian Building Code, The formula for wind load is striaght forward but I can't find the value for exposure factor used in the formula. Does anyone know where I can get this information or where I can find some sample calculations or an Excel...
  19. Matador

    Bolt Failure Problems

    The conveyor chain & pans have been replaced several times over the last 10 years. There is a tab on the chain link every few pitches which gets bolted to the pan. Last year we started a program where we replace the chain & attachments every year during our annual shutdown. It hasn't been a...
  20. Matador

    Bolt Failure Problems

    Yes the bolts were breaking. One solution tried was to install a shime under the nut for tightening then remove it and leave a gap for thermal expansion. This worked but the nuts would tend get loose, come off and the bolts fall out. I'm curious about the spring theory to justify longer bolts...

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