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Recent content by daveb9

  1. daveb9

    Projet 3500CPX Max - User search

    Hi Aukanaii26 We have had one of these machines for about 12 months printing infrequently. For us it has been a total disaster. Almost every time we have looked to print we have had blocked jets. i can give you more details of our issues if you contact me directly at dave_b_9@hotmail.com Dave
  2. daveb9

    Design of spherically dished covers (bolted heads)

    Thank you Prex and GenB The current route I am taking is to model the flange in a FEA package. I have calculated thicknesses from ASME of a standard flange with no groove, and have FEA results for the ASME design. I am now developing the shape of my deep groove design keeping the deflection and...
  3. daveb9

    Design of spherically dished covers (bolted heads)

    Design of spherically dished covers (bolted heads) ASME IIIV Appendix 1 1-6 I am trying to optimise a design of a bolted head similar to FIG 1-6 (D) with regards to the thickness of the flange T. My design differs from the figure (D) by the fact that the seal is carried within the flange in...
  4. daveb9

    Calculating relief valve flow capacity temperature

    Thanks EGT01, I hadent noticed that my equation was not shown correctly here is the correct notation Squrt [ν]/([ν]([δ]h/[δ][ν]))p Dave
  5. daveb9

    Calculating relief valve flow capacity temperature

    Dear Montemayor Yes I mean the Compressed Gas Association (CGA) and the 2 gasses in question are liquefied compressed gas R32 and R125, And I have a copy of "Handbook of Compressed Gases” as published by the CGA as well as Recommended Practices API 520 and 521, I was just a little unsure in...
  6. daveb9

    Calculating relief valve flow capacity temperature

    Dear All I am looking to calculate the flow rate required, to relive a tank in a fire engulfment situation. The tank is a portable tank which has a safety valve set at 500psi and is intended to carry 2 products on the outbound and inbound journeys. The problem is that the valve has to be set...
  7. daveb9

    Calculating relief valve flow capacity temperature

    Dear All I am looking to calculate the flow rate required to relive a tank in a fire engulfment situation, I have the CGA S1-1.2 Pamphlet in which is the following equation is used when calculating the flow capacities of pressure relief devices for critical and supercritical fluids, to...
  8. daveb9

    PTFE Seat Ball valve problems

    Thanks Mike But our valve does have a inner support and appears not to have extruded into the valve bore, the seal has been turned inside out for a 5mm section from the outside of the seal into the bore. My latest theory which we will test, is that the valve has only been opened 90% the small...
  9. daveb9

    PTFE Seat Ball valve problems

    We manufacture 2" and 3" 2 piece ball valves with a maximum pressure of 500PSI for the Freon gas market My problem is that we have had some seal failures, the failures have occurred in 0.02% or less of the valves that we have produced. However, I would like to eradicate the problem completely...
  10. daveb9

    Diaphragm Cylinder

    Have you tried using a car break cylinder here is a link to Haldex http://www.brake-eu.haldex.com/html/frameset.php3 you could also try Bendix and Wabco Dave
  11. daveb9

    Please confirm that 2 curve projection has been removed in WF2.

    it is not true that 2 curve projections has been remove from Wildfire, however, you now have to sketch 2 curves then pre select the curves to create the projected curve
  12. daveb9

    Cold Service Carbon steel

    We are manufacturing carbon steel valves for -30°C (-22F)servce I am looking for a steel specification for tube and bar that will operate at these temperatures with a minimum of pre and post weld heat treatment. At present we intend to make most the valve from SA516-70N. Dave
  13. daveb9

    PL+Pb Limits, Linearization, and FEA

    Bob Where does the 1.5 to 3. stress factors come from? Dave
  14. daveb9

    Strain gauge testing stainless steel

    Dear All We have in the past Strain gauge tested some off our stainless steel designs to UG101, I have just read the bulletin (link Below) that austenitic stainless steel designs should not be tested to UG101. My questions are 1)What do the forum think of this 2)What is the best alternative...
  15. daveb9

    Filtering data and selecting from a list

    I have a number of products which I would like to select from within Excel the product have features and I would like to be able to use a list box to allow me to select the product I require For example Product feature1 feature2 feature3 feature4 XY1 y n y...
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