Self-contained electro-hydraulic actuator for ATEX Zone 1

[ScottyUK]

I'm looking for a self-contained electro-hydraulic actuator for an ATEX Zone 1 application. I've found one possibility from Rexa, but I'm looking for anyone else with a similar product. Approx stroke 8", approx force 100kN, transit time approx 10 seconds.

Any ideas? I've tried Google and the usual suspects like Moog and Rexroth on the net but haven't found anything.


----------------------------------

If we learn from our mistakes,
I'm getting a great education!

 

[budt]

Here are some I am know of:

http://www.orientalmotor.com/products/limo/index.htm

http://www.exlar.com/

http://www.mmacactuators.com/

Also look at

http://www.linmot.com/

http://www.linearactuators.com/Sect...?PC=8999400&CL=1&lang=1&IT=Descrip&L1=8999400

http://www.linak.com/

Bud Trinkel CFPE
HYDRA-PNEU CONSULTING, INC.
fluidpower1 @ hotmail.com

http://www.fluidpower1.us

 

[ScottyUK]

Thanks for the reply Bud. The M-MAC product is what I had in mind - I will contact them and see if they offer anything with European ratings for explosive atmospheres.

The application is a gas turbine IGV positioner, so it is fairly arduous duty. Reliability is paramount. We have a possibility of tying a regular hydraulic servo in to the turbine's existing hydraulic system, but the costs look pretty high to pursue this. The OEM-fitted actuator is a pneumatic positioner, and it has neither the operating speed nor the accuracy that we would like. I'm shying away from pure electric types using screw type mechanisms from a reliability point of view, but based on gut feel and out-of-date experience. How do current all-electric types fair in high temperature, continuous modulating service? My experience has been that they are inferior to hydraulic, but I'm aware that it is an improving technology.



----------------------------------

If we learn from our mistakes,
I'm getting a great education!

 

[budt]

I've not used any of these type actuators, just always interested in other ways to get a job done. Actually I have yet to see one in application except for an electric screw drive on a lawn tractor mower deck lift. So, I can offer no experiences with using the devices.


Bud Trinkel CFPE
HYDRA-PNEU CONSULTING, INC.
fluidpower1 @ hotmail.com

http://www.fluidpower1.us