Posted 10 April 2012 - 04:23 PM
valve1.jpeg 51.16KB 52 downloads valve2.jpeg 71.11KB 50 downloads
Posted 10 April 2012 - 06:18 PM
The ported pilot exhaust may be used when the gas is toxic or unsafe to exhaust wherever the valve is located. An example would be if the valve was operating on natural gas.
You can also look up the details on the parker site.
The blocked ports are the exhausts by the way, a fairly unusual configeration.
I would expect this may have been used in the Toxic or flammable gas service.
Posted 10 April 2012 - 10:55 PM
Posted 11 April 2012 - 01:35 AM
"Improvise, Adapt and Overcome!!"
"...the reason for living was to get ready to stay dead a long time." **
Posted 11 April 2012 - 08:11 AM
The only way to be sure is to try it. Maybe if you could get someone at parker to talk you, you may learn something but for the time spent typing on here I would have already hooked it to air and would know if it will work or not without the electrics.
Oh, and do I even have to use the electric solenoid or could I just use a roller valve attached to the external pilot to change states? -J
Posted 11 April 2012 - 05:40 PM
For a normal double acting cylinder control valve you have 5 ports, and 2 conditions. One state will connect pressure to a cylinder port and connect the opposite cylinder port to exhaust to allow the cylinder to travel. When the valve is switched to the opposite state the opposite cylinder port is connected to exhaust and the formerly exhausted port is supplied with pressure.
In the lead forming press, there may have been a reason for blocked exhausts. May have used a secondary exhaust to better control speed or used for position control.
Having designed hundreds of pnuematic and hydraulic control circuits, including many presses, I can tell you that there are many thousands of possible valve configerations. Search the web for a guide to the ISO symbols used and that little diagram on the side will tell you most all you wish to know.
In practical answer to electrical vs pnuematic controls for a hammer, anything doable with pnuematic controls can be done with electrical and pretty much vice versa.
Think voltage = pressure, amperage = flow volume, resistance is flow control. Roller valves are limit switches. control valves are relays and so forth.
Posted 11 April 2012 - 05:48 PM
Posted 11 April 2012 - 10:14 PM
Posted 14 April 2012 - 11:34 AM
Well, i just bought fittings to test out my set up. Valve works great. I hooked up an external pilot and i actually think the electric allows faster switching and is much more responsive than the roller valve. Also, the directional valve will work without electric and off air pilot alone. Havent thought about it yet, but could there be a benefit of having both?
I have an electric air switch I have been wondering the same thing about. Some have suggested it may not switch fast enough for a kinyon, but most just don't know because its never been tried. The standard Kinyon plumbing tends to incopoprate air pilots to help with switching instead. I would really like to know as I still have all of the components to run an electric switching air hammer. Please, J. W,.S., keep us posted with your findings.
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