Is there some way to convert the file to ORCAD, or something else more common?
I contracted the CB design on a new product by a EE (I'm an ME). The EE used IVEX. So now I have a .BRD file generated in an IVEX program. I'm having the board assembled by a 3rd party, and I want them to be able...
Why do copper-fin water heaters require minimum flows? What would happen if it was provided 40F inlet water, and set to 200F outlet water?
a) Is it an issue of scale build-up?
b) Is it an issue of melting fins?
What is the reason for (a) or (b)--Does it occur only because there is unequal...
Why do copper fin-tube water heaters require minimum flows? What would happen if it was provided 40F inlet water, and set to 200F outlet water?
a) Is it an issue of scale build-up?
b) Is it an issue of melting fins?
What is the reason for (a) or (b)--Does it occur only because there is...
Does anyone manufacture a pneumatic pressure adder?
I have 2 pressures that I want to add together to provide a pressure signal to a Siemens SKP20 SSOV/regulator.
One signal is about 4"WC (natural gas) and the other varies from -0.5" to -2" WC (air). I want to add the two together and provide...
I'm looking for a company that manufactures bimetallic vent dampers that can make a custom one.
I have a 6" duct system in which I want to compensate (passively) for inlet air temperature. A bimetallic damper that has a range of:
120F full open
-40F partially closed to allow the same mass...
Is there a device that will take a pressure and divide it, with no flow?
I have a gas pressure regulator which I am controlling with a feedback pressure. The line gas pressure is 4" WC; the feedback pressure ranges from 0 to 6" WC (varying). Without pressure reduction, my feedback pressure...
What is the technical name of a concentric duct reducer/increaser that has a step (shown below), not a taper? Where can you buy them? I found an old 6x4, but I'm looking for a 6x5. The reason I'm looking for this is that I want to increase from a 5 to a 6 without taking up any additional...
Are there any low cost thermistors that can operate up to 350C or 400C? I am trying to measure the temperature in a flue that can get up to ~700F with a probe that connects to a circuitboard I am designing. I'm not sure if I need PTC or NTC, but I can probably make it work with either.
Pesy
How many air changes are typical in an apt building in NYC?
I live in a 12-story, 88 unit apartment building that has many of its radiators broken (can't be shut off), resulting in many apts being overheated. Therefore, the apts with the broken radiators keep their windows partially open...
I have heard that some foundries can cast copper tubes into alumiunm castings. I had a foundry that is doing some work for us try it, and the copper melted/absorbed into the aluminum. How can it be done?
I am using c12200 tubing, 1" dia, .049" wall
356 Aluminum
I need to maintain good thermal...
Is there a place that sells polysulfone pipe fittings? I am looking for a 1/2" x 1/4" hex reducing bushing made out of polysulfone.
It is polysulfone because it must meet the following requirements:
160psi @ 250 F
In water with various PH
Good Electrical insulator
Good Strength
Is there a standard for light duty flanges?
We only have about 1 psi pressure and we're using sheet metal parts to confine the fluid. We would like to find a standard size light duty flange to use for our connections. Specifically, we're looking for 5" & 6". Everything I've found so...
I am trying to calculate the thermal expansion of a tube--more specifically, I am trying to calculate the stress in a tube when two concentric tubes expand and the coefficient of thermal expansion of the inner tube is greater than that of the outer tube. I know how to do this for linear...
Hi,
I'm looking for a steel (probably stainless) that has corrosion resistant properties equal to or greater than that of 316 and a yield stress of 200ksi or greater. Obviously it will be a treated material. Is there anything that fits the spec, preferably something with 20% or less nickel?
Phil
what is the maximum turndown ratio avaliable on a fully modulating natural gas burner? If you have an answer, do you know of a source (document) that states this?
I am looking for an instrument that measures the BTU content of natural gas. My utility company says they give us anywhere from 1000 to 1030 BTU/ft3, but I've also heard that they really provide less.
Does anyone know where to get a stainless steel air venting valve? I'm looking for one rated for 150psi to put on a boiler to release the trapped air.
Is there a glass (or other material) that<br>has high IR transmissivity in the 2-5 micron<br>band, and can withstand temperatures of <br>1000 degrees F?
