We are in the process of replacing our belt drive with a direct drive on a 30000cfm centrifugal fan. The existing fan/motor base is mounted on a number of springs (design would be circa 1970).
Is it still common practice to mount these type of systems on springs, vs rigidly mounting them to...
The valve is to be used on a small water filtration plant. There is currently a solenoid valve installed, however it seems to get stuck (either it doesn't open when called on, or opens half way). This seems to occur approximatly 5% of the time.
I'm looking for a valve with a greater torque.
I'm looking for a 1 1/2" threaded valve with a spring return electric linear actuator. Honeywell makes one (ML7425), but the open time is 90 seconds and that is too long for my requirements.
Does anyone know of other makers of small electric actuated valves?
I'm at a hydroelectric plant in Canada. We typically send our PRV's off to be tested and recalibrated if required.
What training would be required for my mechanics so that they could test and recalibrate the PRV's themselves?
Thanks!
I have a 300psi dry air line that needs to run under a crushed gravel roadway in a switchyard. The current plan is to use 1" Sched 40 SS. I'm trying to decide if the pipe needs to be protected from the forces of a truck driving over top, or whether laying it 1' underground will be enough...
If I have to make a flange with unique dimensions (ie. we are matching a russian bolt pattern), is my only option to get a blank flange and machine it? I know this is probably a dumb question, but are there any other materials that come in round carbon steel bars that can be used? (I see B16.5...
I am an EIT wanting to take an introduction to the practical use of the ASME codes (particularily Pressure Vessel codes). Can anyone recommend any good short course providers in Western Canada? (ie 3-7 days)
ANSI too if you know of any (flange design etc..)
I am in BC, Canada. I just looked at the WCB OSH standards and it only talks about the bleed line for a double block and bleed system (where the bleed has to be the same diameter as the main line). I agree - 1/2" seems small.
I have a 600psi 8" hydraulic line that is isolated using a single block and bleed. There are concerns that the existing 1/2" bleed line is too small. Are there standards that dictate the minimum bleed line size?
Thank-you for all your tips. We have decided to replace the russian globe valve with a trunnion mounted ball valve as this will provide a better seal as an isolation point. I'm not sure why a globe valve was installed as an isolation point in the first place...
Thanks again.
Christine.
I am looking to install a newco 8" class 300 gate valve operating as an isolation point on a 570psi hydraulic system. Is there a way to determine what the required opening torque at full differential pressure will be?
Basically, how do I know if the manual actuator will be suitable in...
I'm looking for the material properties of a russian material: roct 4543-61 used to make a M72 stud.
Does anyone know either the properties or the North American equivalent to this material?
Thanks
Christine.
I have an 8" globe valve mounted horizontally on a 300psi hydraulic line. Even after overhauling the valve, it still passes. Could the horizontal orientation of the valve be part of the problem? Are some valves better than others in certain orientations?
Thanks!
I have a 24" Centrifugal Fan currently operating at 1985 RPM. I would like to increase the RPM in the future (change from belt driven to direct drive). How do I determine what the RPM limit on the fan is? Is there one? I am not able to find a fan curve.
More specific details below:
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