Hydraulic Pressure Valve Controlled By 4-20mA Signal

[gerard]

Hi All,

I want to replace a manual hydraulic pressure valve with a valve that can be controlled with a 4-20mA signal. The pressure will be monitored by a gauge which will correct the pressure if necessary. Has anyone ever seen such a valve and can recommend a model/make?

Gerard

 

[netblindpaul]

Bosch Rexroth will have a solution I have no doubt TBH.

 

[Darkwood]

If the hydraulic motor has a VSD control you can probably get a pressure sensor to directly control the motor via a 0-10v or 4-20mA signal to maintain a given pressure this will be an accurate way of doing it but if you have a wide birth re' the target pressure cheaper options will be available

 

[Knobhead]

As Paul said Rexroth. Not cheap mind, but you get what you pay for.

 

[pmac10]

i believe want you want is a hydraulic proportional valve, google this will point you in the right direction, as mentioned bosh rexroth a likely source

 

[Knobhead]

It's the 4 to 20 bit that limits the field.

 

[Darkwood]

could always open the field with a signal converter me thinks but a possible £100 to do this so unsure if it will be cost effective

 

[gerard]

thanks guys, had a look on Bosch site and guy going to call in next week to look at application. I'm sure he will point me in right direction...

 

[netblindpaul]

gerard,
What is his name mate I may know him personally, IF he is a BR sales guy as I worked there for several years on the electrical & hydraulic sides of the business.
If you don't want to post his name in open forum, please PM?
I do know many of they guys that are still there.

 

[gerard]

I'm in Ireland! It's a company called Hydraquip.

 

[netblindpaul]

Ah OK an agent, I bet my ex-boss knows them!
His Mrs is from Ireland, he used to spend lots of time over there.
I don't know any of the agent guys on your island, sorry.

 

[gerard]

No problem, I'll see what they have to say, always helpful. Thanks