Proportional valve

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nzkunal

Joined: 11 Mar 2004
Posts: 51

07 Feb 2008 5:23 157b4033

Hi,

I am building a system to test proportional valves they are rated at 24V and 700mA. I am wondering if they will draw this power when a pilot signal is supplied even if there is no load connected.

Thanks,

Kunal

fsahmed

Joined: 19 Sep 2005
Posts: 108
Helped: 11
Location: Metz, France

07 Feb 2008 5:28 157b4228

no, rating is for loaded condition.

nzkunal

Joined: 11 Mar 2004
Posts: 51

07 Feb 2008 5:33 how to hook up a proportion valve

Any suggestions for how I could test the Power consumption of these valves easily?

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fsahmed

Joined: 19 Sep 2005
Posts: 108
Helped: 11
Location: Metz, France

07 Feb 2008 5:36 157b4033 datasheet

Perform a load test if u have a test bench on which u can install the valve. Otherwise, just hook up an ammeter to the supply.

FvM

Joined: 22 Jan 2008
Posts: 5154
Helped: 766
Location: Bochum, Germany

07 Feb 2008 8:58 pveh 157b4033

Hello,

I'm not sure, what you mean with load connected. If this refers to the fluid connections, it will ususally have no influence on current consumption, unless the valve has a position feedback. But to check or adjust driver circuit setpoints, you need a fluid supply, at best with nominal pressure and also a suitable flow meter.

Regards,
Frank

nzkunal

Joined: 11 Mar 2004
Posts: 51

08 Feb 2008 4:11 test proportional valve

Hi,

Thanks for that yes by load connected I did mean fluid lines...

I am building a power supply for these valves and wanted to test it before actually using it to power these valves in the field. I was thinking of setting them up in the lab and running them from the power supply. But I want to set them up so they are consuming the max rated power and am not sure if that is actually possible without having the fluid lines connected.

The actual valves are PVEO 157B4228 & PVEH 157B4033 and their max power consumption as stated in the datasheet is 8W 24V @ 0.33A. I have already used a 70ohm 50W test setup to ensure that my power supply can provide 24V @ 0.33A.

Thanks again for your help

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FvM

Joined: 22 Jan 2008
Posts: 5154
Helped: 766
Location: Bochum, Germany

08 Feb 2008 9:29 157b4033 valve

Hello,

I would expect maximum current flow with pilot signal at the limits. If you want to test power supply rather than valves, you should consider data sheet maximum values plus some overhead, individual valves consumption may be lower.

b.t.w., to unload EDAboard server, you should rather post a link to manufacturers data sheets here.

Regards,
Frank