Waterjet Group

Welcome to the ultimate waterjet forum, WaterjetGroup.com!
This forum will give you access to participate in discussions and attain resources via our vibrant waterjet community . This discussion board is intended for any waterjet user but the majority of the moderators are associates of Flow International Corporation. We will attempt to make this community an unbiased source of information regarding general waterjet topic areas. If you are a registered Flow Waterjet customer and require in-depth product support, please visit FlowParts.com.

Members Login
Username 
 
Password 
    Remember Me  
Waterjet Group -> General Chat & Discussion -> Losing Pressure
Post Info TOPIC: Losing Pressure
Rodney54


Newbie

Status: Offline
Posts: 2
Date:
Losing Pressure
Permalink  
 

I have a question witch I hope I'm able to get some quick feed back on. We are having a large problem with our pump RPM's getting lower every time the machine is about to pierce. It was doing it on the dump but after we cleaned and rebuilt our dump valves it worked great for about a week. But again tonight it started to lose RPM's which is lowing our pressure. Does anyone know what could cause this or what the fix could be?

Thanks

Rodney



__________________
LabradorBob


Member

Status: Offline
Posts: 13
Date:
Permalink  
 

The motor slowing down or just losing pressure?



__________________
TFabian


Veteran Member

Status: Offline
Posts: 94
Date:
Permalink  
 

Is this an Omax or Flow direct-drive pump? If this is an Omax, I likely know your problem.

__________________
Do not waste today regretting yesterday.
D 1413


Newbie

Status: Offline
Posts: 1
Date:
Permalink  
 

We have an Omax 55100 with a 3050 pump and are experiencing the same problems as did Rodney54. I'm wondering what caused the problem and how it was fixed. Hoping that someone can help.



__________________
TFabian


Veteran Member

Status: Offline
Posts: 94
Date:
Permalink  
 

On an Omax machine, where you have both a nozzle on/off valve and a dump on/off valve (located in pump cabinet), make sure that whatever orifice you have in your dump valve is a larger diameter than your nozzle one.  Otherwise, what happens is that when you first start cutting you might be at 50k, but when you traverse and send water down the dump valve, the pressure may spike up a bit to something like 54k due to the smaller orifice (greater restriction).  The variable frequency drive then automatically lowers rpms to bring the pump safely down to 50k, but when you end the traverse and start cutting again the pump will only be cutting at something like 46k because of the lower rpm's.

Good Luck,
Tim



__________________
Do not waste today regretting yesterday.
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Waterjet Group -> General Chat & Discussion -> Losing Pressure
Please note, the views and recommendations expressed by employees of Flow or it's partners on this website do not necessarily represent those of Flow International Corporation. For more information on this site's Terms of Use , please visit the DXF Copyright and Community Guidelines pages.

Important: Do not upload any DXF's or images without permission unless they consist entirely of content you or your company created.

By clicking "Upload file", you are representing that this DXF or image does not violate the WaterjetGroup.com's forum's Terms of Use and that you own all copyrights to this file or have authorization to upload it.