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Recent content by UNSR60001

  1. UNSR60001

    Plug Vlave Type

    Sleeved Plug Valves are ideal for Molten Sulfur service. They offer distinct advantages inherent in its design. There are three main advantages and they are as follows: The most important advantage would be that of being so called “Cavity-Free” In this case, what I mean by Cavity-Free is that...
  2. UNSR60001

    Do u need to pre-heat weld rods for seat rings?

    valvebot: your question is so generic that I will in turn answer you in a generic way. It is good practice to always preheat welding rods. When it comes to making a decision to preheat or not to preheat welding rods the answer is "when in doubt preheat" Now to really address your question...
  3. UNSR60001

    Valve selection

    Diego: What I am saying is that if you have WET CARBON DIOXIDE, carbon steel is not recommended for this service. your valve selection of " 3" cLASS 1500 gLOBE, rf, bODY: a351 CF8M, Trim: A182 316 SS with Stellite Overlay " is apropriate for Wet Co2. should your service be DRY Co2 you can use...
  4. UNSR60001

    Valve selection

    Diego: As far as the Temperature-pressure goes you are fine with ether carbon Steel or 316SS in a class 1500# valve. What you need to consider is the Corrosion Tables and they are as follows: Carbon dioxide, dry: Carbon Steel or 316SS "good" Carbon dioxide, wet: Carbon Steel "not...
  5. UNSR60001

    Piston type valves

    It never ceases to amaze me the denominations that people use for valves, it seems that people out there just pick arbitrarily names to describe valves or they use a non technical dictionary to traduce a valve name into English. Fortunately the valve industry in America is well developed and...
  6. UNSR60001

    Valve leakage

    pipexp, I would be very happy to write an opinion should you provide the following details: Application. Line size. Preassure, min., normal, max. Temperature, min., normal, max. Fluid. Application. Current Valve type and configuration. Encountered problems with existing valve.
  7. UNSR60001

    What is "Swimming Bowl" in valves???

    Cadymap, Sorry to get back to you so late, unfortunately I don’t have as much time as I would like to enjoy with posting here. I am very glad that you inquired about the rising steam ball valves. As I am positive that many users in these forums would like to know as well. Being that said. I...
  8. UNSR60001

    What is "Swimming Bowl" in valves???

    Well, I was inclining not to post anything to the "swimming bowl" question. First, it truly seems like a non sirius question, bordering on a prank. Second the answer is so obvious that does not merit a posting to begin with. ASK YOUR CONSULTANT TO CLARIFY WHAT IS A "swimming bowl design and...
  9. UNSR60001

    Valve Flange Bolting in Shear and Torsion due to side load

    Note, that is important to know if you are specifying/have installed a quarter turn valve or a rising steam. As each type of actuated valve would transmit forces in a different way to to the pipe/flanges. Additionally, quarter turn valves vary greatly in their torque requirements. And can be...
  10. UNSR60001

    4 offset Butterfly Valves ( Quadruple Eccentric )

    Hi, I was wondering if anyone can provide me with manufacturers (name, brand and location) of 4 offset Butterfly Valves - Quadruple Eccentric. I had Literature of an European manufacturer, however i let a colleague borrow it and is lost. I don't remember the name ether. I also tried searching...

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