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  1. RontotheB

    Brass Annealing Properties

    Yes sir, I am. Actually, in some of my tests, when I hand-cut brass with titanium scissors (this sounds absolutely ridiculous, I know), I obtained impressively consistent results, all within 25 psi, and with a standard deviation of 15 psi. Machine stamped parts had a standard deviation of...
  2. RontotheB

    Brass Annealing Properties

    Ed, you're right in that they are ruptured where they are restrained. Usually this process produces circular rings where the pressure "stamps out" an inner circular area.
  3. RontotheB

    Brass Annealing Properties

    No sir, there is no crease or notch. The only work done to the metal after annealment is the actual stamping.
  4. RontotheB

    Brass Annealing Properties

    Thanks for the info Ken. As far as the amount of work hardening due to punching, I don't think it'll be much of a factor, because punching will work harden the outer area of the disc. The burst pressure, however, relates to the disc's integrity closer towards the center. At least, that's what I...
  5. RontotheB

    Brass Annealing Properties

    Hello, I have a supply of half-hard CDA-260 cartridge brass that underwent bright hydrogen annealment (@800°F for 1:06 w/ nitrogen cool). This annealed brass as well as its half-hard cousin were both stamped into 0.006" thick, 0.56" discs, which were later burst under pressures above 2500 psi...
  6. RontotheB

    Relays and How They're Rated

    Hey everyone, I was looking into getting relays for my circuit, and was hoping you could help. Here's what I want to do: I need to use an AC power source (a typical wall socket) to power a DC solenoid valve (which has a 24 V rating) AND its AC controller (which has a 120 V rating). That's the...
  7. RontotheB

    Solenoid AC Inrush, Voltage, and Circuit Design

    Hey logbook, I had already found that sheet, but it didn't contain any other useful information besides what I had provided. What do I need to know in order to find the coil's impedance?
  8. RontotheB

    Solenoid AC Inrush, Voltage, and Circuit Design

    The valve P/N is EH30-043-A120. It's a Magnatrol valve (Clark Cooper Division). I'll look for a data sheet and link it if I find one. Thanks for the info, logbook!
  9. RontotheB

    Solenoid AC Inrush, Voltage, and Circuit Design

    Oh, sorry for the double post. To answer your questions, there is no temp monitor, but it was very hot to the touch (around 150 degrees F). They are rated for continuous duty, but from my understanding, that just means that they can stay energized indefinitely. It doesn't indicate anything as...
  10. RontotheB

    Solenoid AC Inrush, Voltage, and Circuit Design

    I got around 0.18 Amps, with I = P / V. I also got R = V / I, suggesting around 650 Ohms. Am I missing something? Are solenoids modeled as a combination of inductors AND resistors, or just one or the other?
  11. RontotheB

    Sizing a Valve with Cv

    Hello, I was wondering how to best size a solenoid valve. I know that one specification that can be used for this purpose is Cv (flow coefficient). How would I use this parameter? I have 3750 psig on one side and 0 psig on the other (so the differential is 3750 psi). I'm using nitrogen gas at...
  12. RontotheB

    Solenoid AC Inrush, Voltage, and Circuit Design

    Hello, I feel a little ignorant because my schooling didn't properly prepare me for simple circuits, but I have a few questions about a solenoid valve that I was hoping you guys could answer. Here is the background in case you're interested: I bought two solenoid valves for a pressure cycler...
  13. RontotheB

    Brass Replacement

    Hello, I'm currently working at replacing a supply brass of discs. They are supposed to burst between 2500 and 2775 psi, and are made of C22000 copper alloy, 90% copper, 10% zinc (so it's technically a brass, but is called a bronze in the industry). Each disc is about 0.5" in diameter. The...
  14. RontotheB

    Creating a Pressure Cycler

    Thanks everyone for your input. As far as creating that piston setup, I don't really have the tools to build that (or build it well) in house. Safety is also a concern, especially if I modify a high pressure cylinder. I wouldn't want to weaken it structurally in my modifications. Unclesyd, The...
  15. RontotheB

    Creating a Pressure Cycler

    Hello all, This is my first post! Anyway, getting to the point, I'm trying to put together a pressure cycler that will be used to test a valve. The pressure will cycle from 2000 to 3750 psi, for a total of 20,000 to 40,000 cycles. Although my expertise on pressure cycling is limited (especially...

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