Fluid Power – Ceramic Air Motors Put A New Spin On MRI Imaging!

When surgeons need to see inside a patient during a surgery, they often have to send the patient outside the operating room because the metal in a MRI system can interfere with critical equipment needed for surgery. Tasked with this challenge, the designers at Deprag Schulz GmbH & Co., Amberg, Germany, custom-designed an air motor to power the shield in open MRI machines. The result: a modular design that uses only ceramics and plastics, runs on oil-free compressed air, and is almost noiseless.
Photo courtesy of Doral Medical Imaging,
Open-MRI machines, like the one pictured, can use customized, metal-free air motors to allow them to be used in operating rooms without disrupting critical surgical equipment.

Using an MRI (magnetic resonance imaging) machine in an operating room would be ideal for clinical monitoring of minimally invasive procedures (keyhole surgery), during tumor operations on the brain or liver, and procedures involving the heart. However, ferrous metal in traditional motors that drive the MRI’s rotating shield causes interference fields in the operating room. The patient, therefore, has to be moved to an adjacent room accompanied by an anesthetist in the middle of an operation to be examined using operative magnetic resonance imaging. Such brain tumor examination procedures have been successfully carried out at the Neuro-surgical University Clinic in Heidelberg, Germany, for 13 years.

In an effort to reduce the need to move patients, research has been conducted to provide an accompanying MRI exam inside operating rooms. Instead of the usual MRI tunnel system, new open MRI exam systems enable doctors to access the target area of the patient during image scanning. The need then, was to develop a rotating MRI-imaging shield driven by a completely metal free-system, including the motor.

Going metal-free

A custom designed air motor from Deprag uses ceramic and engineered plastics instead of metal, thereby preventing it from producing stray electromagnetic fields.

Because they must contain metals to generate magnetic fields to convert electrical power into mechanical rotational power, any electric motor was ruled out. Therefore, an air motor became the most likely solution. The challenge to develop a completely non-metal air vane motor was presented to the Development Department at Deprag Schulz GmbH & Co., Amberg, Germany. Gerd Zinn , the head of Serial Machine Development remembers: “This motor was needed for diagnostics in an MRI system where the use of metal would cause interference with the operating system. Therefore, it was not a suitable material for the application.”

Product Manager Dagmar Hierl added, “Our ferrite-free air motors were designed and developed especially for such an application. These Deprag air motors can play an important role in the development of medical equipment.” This motor is suitable for other applications where the use of metal is out of the question.

Modular designs make for easy customization

Deprag specializes in air motors. Hierl said that 85 % of all the company’s projects are special solutions. “We individually adapt the air motors from our catalog to fit our clients’ specific requests. We are able to develop cost-effective special motors because of our modular system,” Hierl said. “The spectrum ranges from single air motors to fully automatic production systems. Creativity and customer focus are therefore very important to us.”

The team set to work, drawing on their knowledge from decades of developmental projects involving air motors. The result: an air motor made of ceramic and synthetic materials that does not contain a single piece of metal.

Circuits and systems made easy
Fluid Power Systems and Circuits, by Russell W. Henke, P.E., highlights circuit analysis and design flow for: constant and demand flow circuits, directional controls, pressure controls, and more. Complete with illustrations and easy-to-understand text, this book shows you how to analyze interactions of system components and how to pull an entire design together to meet anticipated loads and operating requirements. 400 pages, hard cover book, $80.00. Visit http://bit.ly/HPBooks to order.

The prototype of the ceramic motor has a diameter of 40 mm and is only 78 mm long. Operating from compressed air at 2 bar, the motor transmits 150 W of power at a speed of 14,000 rpm. At its idle speed of 9000 rpm, it achieves 36 W power.

Because the entire motor system had to be metal-free, the pneumatic hose end fittings are also made of an engineered plastic. Three ports on the motor produce clockwise rotation, counter-clockwise rotation, and exhaust. In addition, valve circuitry is designed based on needs. For example, if one directional hookup is used (either CW or CCW only), a 2-position, 3-port valve is used. If bidirectional rotation is needed, a 3-position, 4-port valve will be used.

Zinn says the motor runs on oil-free compressed air. And although the research team did not require it, Deprag designers worked to reduce noise as well. To reduce noise from the motor assembly, a hose system was designed consisting of a combined inlet and exhaust hose.

For more details, contact Dagmar Hierl at d.hierl@deprag.de or Gerd Zinn at g.zinn@deprag.de, call +49 09621 371-343 begin_of_the_skype_highlighting +49 09621 371-343 end_of_the_skype_highlighting, or visit www.deprag.com.

In the U.S., contact Lori Logan at Deprag Inc., at (972) 221- 8731, ext. 3806 or visit www.depragusa.com.


Fluid Power – Electro-Hydraulic Position-Sensing or “Smart” Hydraulic Cylinders

Fluid Power - Energy Logo

Electro-Hydraulic Position-Sensing or “Smart” Hydraulic Cylinders
Position-Sensing or “Smart” Hydraulic Cylinder
Fluid Power Smart Cylinder

Nearly all of Energy Manufacturing’s fluid power hydraulic cylinders can be provided with an electronic position-sensing option. Such units are also referred to as electro-hydraulic control, or “Smart” cylinders. This sensing is accomplished with technologies proven by many years of application / field experience and success.

Both internal and external position-sensing designs are available. Accuracy as high as +/- .008 inches (+/- .2 mm) can be provided, depending on cylinder stroke length and other application and design parameters. In addition, new sensor technology is available that provides the following features and benefits:

Unchanged Center-To-Center Retracted Distance in Many Applications
Environmental Packages to Meet IP69K Water Intrusion Resistance
Working Pressures to 9,000 psig (620 bar)
Stroke Lengths from 2.5 inches (6.35 cm) to in Excess of 15 feet (4.57 m)

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In addition to the position-sensing option, available cylinder features include:

• Single-acting, double-acting and ram-type designs
• Standard bores from 1 inch (2.54 cm) to 10 inch (25.4 cm); other sizes available
• Standard rod diameters from .625 inch (1.59 cm) to 6 inch (15.24 cm); other sizes available
• Standard strokes to 15 feet (4.57 m); longer strokes available
• A wide variety of mounting configurations and end mechanisms
• A variety of integral valves

• SAE ORB, NPTF and other porting configurations available
• Special housing and rod materials and for corrosive or hostile environments
• Stop tubes, cushions, and external fluid lines
• Various packing, seal, and wiper materials for optimum performance and life in the customer’s application
• Various surface treatments and finishes for optimum performance and life in the customer’s application

Energy Manufacturing is ISO 9001:2000 Certified © 2008 Energy® Manufacturing Company, Inc. | Sitemap

Contact Energy® Manufacturing Company, Inc.
Contact Us

Energy Manufacturing Company, Inc.
Sales Office:
204 Plastic Lane
Monticello, IA 52310-9472 USA
Phone: (319) 465-3537
Fax: (319) 465-5279
E-mail: Click here to show E-mail


SmartBird – Bird Flight Deciphered by Festo

SmartBird – Bird Flight Deciphered



Aerodynamic lightweight design

SmartBird is an ultralight but powerful flight model with excellent aerodynamic qualities and extreme agility. With SmartBird, Festo a leader in fluid power and air flow has succeeded in deciphering the flight of birds – one of the oldest dreams of humankind.


This bionic technology-bearer, which is inspired by the herring gull, can start, fly and land autonomously – with no additional drive mechanism. Its wings not only beat up and down, but also twist at specific angles. This is made possible by an active articulated torsional drive unit, which in combination with a complex control system attains an unprecedented level of efficiency in flight operation. Festo has thus succeeded for the first time in creating an energy-efficient technical adaptation of this model from nature.

New approaches in automation

The functional integration of coupled drive units yields significant ideas and insights that Festo can transfer to the development and optimisation of hybrid drive technology.


The minimal use of materials and the extremely lightweight construction pave the way for efficiency in resource and energy consumption.


Festo already today puts its expertise in the field of fluid dynamics to use in the development of the latest generations of cylinders and valves. By analysing SmartBird’s flow characteristics during the course of its development, Festo has acquired additional knowledge for the optimisation of its product solutions and has learned to design even more efficiently.

Festo USA

For Customer Service

1-800-99-FESTO (800-993-3786)

1-800-96-FESTO (800-963-3786)



For Product Support

1-866-GO-FESTO (866-463-3786)

1-800-96-FESTO (800-963-3786)


Fluid Power – Pneumatic Valve Body

Fluid Power - Pneumatic Valve Body

Valve series VTUB-12

For general and classic

fluid power applications

New: bus node CTEU for simple, direct and low-cost networking


  • Fieldbus technology with bus node CTEU: fewer I/O on the PLC, installation time reduced by up to 35%
  • Excellent price/performance ratio: no extra cost, but more intelligent than multi-pin plug solution – plus basic diagnostics
  • New: fast troubleshooting thanks to LED signal status display on the sub-base
  • New: variant with detenting manual override
  • M8 connection and protective circuit for individual valves
  • “Plug-in”-capable individual sub-base
  • Selector plate: external pilot air for emergency stop circuits and precision-pulsed switching


Technical data
Valve function 3/2 NC
3/2 NO
5/2 single solenoid
5/2 double solenoid (2 valve positions)
Design Poppet valve
Temperature range [°C] -5 … +60
Flow rate [l/min] 400
Operating pressure range [bar] 2.8 … 8
Power consumption [W] 1
Protection class IP65
Tube push-in connectors QS4 and QS6 in straight or angled design
Number of valve positions 2 … 35

Festo USA

For Customer Service

1-800-99-FESTO (800-993-3786)

1-800-96-FESTO (800-963-3786)



For Product Support

1-866-GO-FESTO (866-463-3786)

1-800-96-FESTO (800-963-3786)


Precision Pneumatic Linear Actuators

Linear Actuators - Modular Automation Components

Fluid Powered Actuator -01

  1. End blocks either anodized or electroless nickel plated with mounting holes
  2. Case hardened and ground shafts
  3. Shock absorbers (except LA-1)
  4. Adjustable stopscrews for end-of-stroke
  5. Flat body design
  6. Stop sensing capabilities
  7. Chrome plated cylinder rods and long life seals
  8. Counterbores or tapped holes in end plates for mounting other components
  9. 4 linear ball bearings with rod seals on all actuators
  10. Tapped and through holes for ease of mounting
  11. Removable and repairable cylinder
  12. Anodized aluminum body and bearing blocks

Fluid Powered Actuator Valve Body

Barrington’s Tuff Series provides a rugged, simple, good value solution for your automation or material handling needs. Engineered for long lasting cycle life with an eye on value, these slides re a perfect solution.

  1. Precision Ground Stainless Guide Shafts
  2. High Performance Polymer Bushings
  3. Hardcoat Anodizing Insures Longer Cycle Life
  4. Cylinder Bore Roller Burnished for Smooth Operation, Additional Surface Hardness and Long Cycle Life
  5. Stainless Piston Shaft

See Linear Actuator Specifications and Drawings

Barrington Automation pneumatic linear actuators feature precise stroke adjustment and high repeat accuracy. Engineered and manufactured for reliability and precision in production environments, linear actuators are available in a wide range of stock strokes and sizes. Custom stroke lengths are available. Contact us for your more information.

Shock absorbers decelerate the load at the end of stroke. Adjustable stop screws allow fine adjustments in stroke length and are used with available switches to provide end-of-stroke sensing.

Barrington Automation
9116 Virginia Road
Lake In The Hills, IL   60156
847-458-0900 FAX 847-458-0934
Email to info@barringtonautomation.com

Fluid Power – Quote With Confidence – Web Based, “Hydraulic Repair Estimator”TM for Cylinders!

Fluid Power - Rupe Hydraulic Repair Estimator - Logo

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Hydraulic Cylinder Repair Program

San Marcos, CA — The new “Hydraulic Repair Estimator”TM for Cylinders program from Rupe Corporation, gives consistent, “Best Price” estimates for hydraulic cylinder repairs from a basic resealing to a complete rebuilding. This comprehensive web based program will work on any desktop, laptop, netbook, tablet with internet access. Web based, there is no software to install, however labor rates, material costs, and cost of supporting services (i.e. Chrome plating) can be personalized for each subscribing company.

The “Hydraulic Repair Estimator”TM for Cylinders program lets a sales person in the field quote with confidence and provide potential customers a consistent, accurate quote on-the-spot in minutes and immediately e-mail the estimate with detailed pricing right from their laptop.

To set up or individualize the program, “shop rates” (labor, material, and overhead) of the subscriber’s company and “shop rates” of vendors, such as chrome platers, are entered and stored. Already in the data base are all the tasks and the time and materials to complete each task, related to the repair of a hydraulic cylinder. To fine tune the program based on experience, an efficiency adjustment can be made to refine the quote process even further for a particular subscriber’s company.

Using “Hydraulic Repair Estimator”TM for Cylinders program is easy. Using a preprinted cylinder evaluation sheet a sales person, or shop personnel takes basic measurements of the cylinder, notes the condition, checks off the appropriate repairs needed, logs on and enters the information into the program, and in seconds has a accurate, detailed quote. The work sheet can be attached to the cylinder and is the identifier and guide for shop personnel.

Who should be using “Hydraulic Repair Estimator”TM for Cylinders program? Hydraulic cylinder repair facilities, with this program can offer more accurate quotes and improved service. Companies that lease or rent equipment with hydraulic cylinders, and companies with large numbers of trucks and off road equipment equipped with hydraulic cylinders can use this program to control costs, make timely decisions such as repair or replace, and analyze quotes from repair facilities.

The low cost of the program is based on the number of new quotes created each month by a subscriber company. A Return-On-Investment calculator highlights the real value of using this program compared to working up a quote from scratch using a pencil and paper. Features also include: A “ToolBox” including a calculator, metric converter, and a data base of Cat® cylinders by part number, recommended vendors, and rebuild instructions.

The benefits of using “Hydraulic Repair Estimator”TM for Cylinders program are: Easy to use, customers will view estimates with confidence, reduce time in getting estimates to potential customers, reduces overhead by reducing time needed to produce quotes, ability to offers quotes On-the-Spot 24/7/365, no over or under quoting, and have greater insight into costs and efficiency.

The Rupe Corporation has been in the hydraulic repair industry since 1976 developing one of the largest repair facilities in the western United States. In 2005 Rupe Corporation took on the task of developing and researching innovative projects that would benefit the hydraulic industry and their customers. One of those projects was a program to bring a pricing standard to the repair of hydraulic cylinders and other components. Drawing on many years of experience rebuilding hydraulic cylinders Rupe Corporation was able to develop a program that is simple to use, quick, accurate, consistent, and sets an honest standard for repair facilities and consumers.

For additional information contact Jack Rupe at: Rupe Corporation, 585 N Twin Oaks Valley Rd; Suite C; San Marcos CA; 760-815-1620 or E-Mail: rupecorp@gmail.com or visit the website at http://www.hydraulicsrepairestimator.com

And say, “I saw it on FluidShop.com, “The Fluid Power Home Page.”