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  1. physicshack

    BS8888 and Hatch Patterns

    Hello I have a question on sectional arrangements and hatching. Drawing mechanical components, in a section view what is the standard for hatching in BS8888. The reason I ask is that we are sectioning a part in aluminum and the listed hatch pattern is ANSI38. This is essentially a cross hatch...
  2. physicshack

    Pump Mechanical Seal: Single Seal vs Double Seal for Toxic Process Fluid

    Many specifications within companies will drive a toxicity rating that will lead the required specification of the machinery, seals and protective systems. Magnetically driven seal less pumps, or Magdrive pumps are often an excellent choice for toxic fluid, and offer a sizable benefit on...
  3. physicshack

    Hydroforming

    Hello everybody Is anyone aware of any hydroforming companies in the UK?
  4. physicshack

    Vapour Pressure in Equilibrium cancelling Vapor Pressure in Tank?

    Agree with the last post, Essentially the fluid is at bubble point at the surface of the liquid level in the supply vessel. the only head providing NPSH margin is the height of the liquid column. Can you provide some data on the pump that you are running, and its NPSHr curve? in a case like...
  5. physicshack

    API 610 - type OH2 MAWP

    Ye, the MAWP should be 40 bar, that said the manufacture is able to deviate from this provided they tell you. This can be done in order to off you a more cost effective solution. DO you need need the 40 bar MAWP?
  6. physicshack

    Performance of Non Galling Alloy

    Hello all I am looking to use a non galling alloy in a pump application. the industry is hygienic, food processing, and the pump type is a positive displacement. I have experience with Alloy 88 (or Alloy 808) but am looking for alternatives. the material would need to be FDA compliant also...
  7. physicshack

    PLC and HMI question...

    Hello Dan That is really helpful thank you. I have an ANU device that i am using to simulate a 0-10 signal for my testing. The ANU has an auto mode that takes an input and then relays the signal. the only issue is it still uses a common ground so I guess what you are suggesting is essentially...
  8. physicshack

    PLC and HMI question...

    Hello I am using a Rievtech PLC and a Wecon HMI to log data for a customer I am making an automated test rig for. the issue is that I am trying to use their existing pressure, flow and power transducers that are already powered to obtain an input to the PLC. The Reivetech (PR-18dc-da-r) has a...

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