MV Products’ Vacuum Pump Inlet Traps
February 17, 2009 by R. Nelson Parrish
Filed under Vacuums
A line of vacuum pump inlet traps that can be customized to match specific pumps or pump and blower packages used in virtually any type of manufacturing process are available from MV Products of North Billerica, Massachusetts.
MV Products’ Vacuum Pump Inlet Traps are custom built from standard housings and combinations of replaceable filter elements to match specific pumps, pump and blower packages, and process applications. Trapping and filtering corrosive byproducts and particulates created by the process and eliminating contamination of the end product, they can prevent premature pump failures and reduce maintenance intervals up to 500%, depending upon the application.
Suitable for vacuum systems ranging from <1 CFM to >5,000 CFM, MV Products’ Vacuum Pump Inlet Traps include the PosiTrap® which comes in sizes that hold from 1 to 4 filter elements and the MV Multi-Trap® featuring a knockdown stage and up to 6 separate stages, each holding multiple elements. Filter media include activated charcoal, Sodasorb®, Resisorb®, stainless steel- and copper-gauze, molecular sieve, activated alumina, and pleated polypropylene.
Submersible and Non-Magnetic Air Motors
February 15, 2009 by R. Nelson Parrish
Filed under Equipment
Whilst it’s not impossible to render an electric or hydraulic motor suitable for complete submersion in water it is costly, complicated and time-consuming. Nevertheless in the marine engineering and process industries there is a real need for such drives and for these applications Huco Dynatork now has the complete answer.
Building on the inherent benefits of its basic air motor design that was specifically designed for operation in harsh and hazardous environments, the company has developed a fully submersible range. These acetyl bodied models with stainless steel shafts and bearings are available in two sizes and specials can be made to order. Ideal for any motion control application underwater such as opening a valve or for propelling a stirring mechanism for example, the motor is also a good choice for washdown environments and flood-risk areas. The motor can withstand aggressive chemicals, high pressure hosing and can operate fully submerged. In common with the standard range, these new submersible motors excel in constant start/stop applications under load and can be applied to give similar characteristics to those of a stepper motor. Reverse operation is achieved by using 5-port control valves giving near instant response even under load.
All the Huco Dynatork submersible air motor needs to operate is compressed air and even that is minimal. It requires up to 80% less than vane motors, providing significant cost savings even at maximum torque. Free-floating pistons transmit maximum torque on start-up that can be adjusted via a pressure regulator.
As a ready supply of compressed air is common in the marine and offshore sites this new motor will of particular interest to these sectors. Air can be supplied via a reservoir and tests have confirmed that a Huco Dynatork motor will run continually for more than 15 minutes from a standard diving cylinder.
Another important air motor development that is already generating considerable interest in the nuclear industry is the new Huco Dynatork non-magnetic model. It combines stainless steel shafts and ceramic bearings enabling the motor to be used in a high magnetic field. It is ideal for applications involving particle acceleration and in systems such as MRI scanners.
A Flywheel coupling to suit every pump and engine
February 12, 2009 by R. Nelson Parrish
Filed under Equipment
As result of changing from traditional vane motors to Huco Dynatork non-lubricated air motors for paint stirring, one UK automobile plant is saving in the region of $130,00 annual in power costs and plant renewals alone.
The customer’s original purchasing criteria for the motors were greater reliability on 24/7 operation and freedom from lubrication to avoid the possibility of contamination. However the switch to the Huco Dynatork model did much more than meet these modest needs. It also substantially cut the need for shop air as even at maximum torque, this design requires less than a quarter of the air consumed by a traditional vane motor.
This manufacturer has now installed 42 Huco Dynatork motors and these have provided a capital saving of two 600scfm compressors and an overall power saving of 152kVA annual.
The operating principle of the Huco Dynatork air motor is simple and unique. Via an integral rotary valve, air up to 6.5 bar is supplied to each of three pistons in turn. The free-floating pistons transmit torque on start-up that can be adjusted via a pressure regulator. This results in high torque at variable low speed and low noise.
The motor is ideal for use in harsh and hazardous environments and excels in constant start/stop applications under load displaying similar characteristics to those of a stepper motor. By comparison an electric motor will often burn out and a vane motor, stall out when subjected to these conditions.
These qualities make the Huco Dynatork air motor the perfect choice for paint and other liquid stirring applications across a wide spectrum of industries.
Piston Air Motor Ideal for the Food Environment
February 11, 2009 by R. Nelson Parrish
Filed under Cylinders, Equipment, Pressure Sensing, Tubing
The Huco Dynatork air motor is quite ingenious. It is based on a unique free-floating piston design that is capable of precise position control. Maximum torque is transmitted on start-up and this can be adjusted to fine limits by standard air-flow valves. Unlike other makes that operate with a system of metal pistons and connecting rods, the Huco Dynatork motor is perfect for stop/start load speed applications under load.
Unlike its vane counterpart the Huco Dynatork air motor is also easier to seal. It is therefore far more cost efficient as most of the energy stored up in the compressed air is converted into motion. In fact it consumes up to 80% less air than a vane motor providing significant cost saving even at maximum torque.
This is an exceptionally clean motor available with non-lube air supply and in a corrosion resistant or acetyl housing. It’s little wonder then that this economical and efficient product has attracted designers of food preparation and packaging systems. However, it has to be said that until now its commercial potential has been somewhat impeded.
When Huco acquired Dynatork, the company inherited a product that was highly effective but remained a first generation design. It had some design issues that hindered its take-up in the hygiene conscious sectors. The recently launched generation two of the design corrects these. The new Huco Dynatork air motor not only looks the technical product that it has always been but it is now ideal for a wider range of applications.
On the original design pneumatic tubing was external to the housing. This made it vulnerable, sensitive to temperature extremes and difficult to clean. The pneumatic porting on the latest models is now an internal feature making them far more robust. Fasteners are also recessed to reduce potential bug traps.
Aluminium foil tray manufacturer Coppice Alupack has systematically replaced all its electric drives on rewind systems that handle the surplus foil after the aluminium coil has been stamped. Inclusion of Huco Dynatork air motors has not only simplified the design but also made it more controllable and safer. Their clean, non-lube running has also ensured hygienic production. The Huco Dynatork motors run from 0 – 220 rpm for 24 hours a day in a cycle that goes from stall to start in the order of sixty times per minute.
“The piston air motor has allowed us to adjust most of the tension out of the system to eliminate lacing breakage,” explained Engineering Manager, James Lamin. “It has also made the process inherently safer by reducing torque and negating the need for any electrical cables.” A further benefit is that maintenance of the motors can now be carried out by a shop-floor technician instead of a skilled electrician, saving cost and minimising downtime.
The suitability of the Huco Dynatork motor for stop/start applications under load has also been proven by Greydon Inc., the manufacturer of printing equipment for form, fill and seal packaging machinery. Its Bagaire taped bag loader ensure bags are presented quickly and in exactly the same position to the operator, time after time. This accuracy makes the system ideal for the inclusion of inkjet coding.
The operating principle is simple but effective. A leader tape is wound around two drive pulleys. When powered up, the system advances the bags by winding up the tape and pulling them up from underneath the load table. The Huco Dynatork air motor is responsible for this operation and again provides a clean solution that is also suitable for wash down.
Modular Flow Diverters for Harsh Environments
February 11, 2009 by R. Nelson Parrish
Filed under Valves
Bethlehem, PA – Bosch Rexroth has introduced a complete line of flow diverter valves with flows up to 60 gpm and pressures up to 5000 psi. The flow diverters are modular, allowing up to 5 additional circuits with minimal pressure drop. Zinc-plated steel bodies and IP69 rated coils withstand the most severe operating conditions, making them ideally suited to mobile applications in mining and heavy industry environments.
Rexroth’s flow diverter valves are available as 3- or 6-way single valves, with the option of creating up to 14-way flows using modular diverters. Standard ports allow for electric, manual, or pilot pressure operation, and flow diverters can be positioned next to the control cylinders, making pipe connections easier and more cost-effective. Diverters provide an economical means of “multiplying” hydraulic controls by allowing an operator to select from two distinct operations under control of one directional valve.
Operators also benefit from single-hand operation thanks to push-button control placed on the handle of the directional valve lever. The push-button handle connects to the solenoid, allowing precise control of the required cylinder.
For more information on Flow Diverters from Rexroth, visit www.boschrexroth-us.com/brh-m.
Air Dryers Provide Moisture-free Compressed Air to Air Braking Systems
February 11, 2009 by R. Nelson Parrish
Filed under Air Preparation, Pressure Sensing
Modesto, California – Racor Division of Parker Hannifin Corporation, the global leader in motion and control technologies, is pleased to announce the Racor/Nabtesco Compressed Air Dryer System. The air dryer provides vapor-free compressed air to a vehicle’s air brake system reservoir. The compact Racor/Nabtesco air dryer utilizes a proprietary high performance desiccant that is more durable and has better moisture removing capacity than other systems.
Features and benefits include a rugged construction, automatic regeneration of desiccant, integral governor and check valve, integral purge chamber, and a heater is available for all models. The air dryers are available in a number of sizes to fit the needs of a variety of applications.
With annual sales exceeding $12 billion, Parker Hannifin is the world’s leading diversified manufacturer of motion and control technologies and systems, providing precision-engineered solutions for a wide variety of mobile, industrial and aerospace markets. The company employs approximately 62,000 people in 48 countries around the world. Parker has increased its annual dividends paid to shareholders for 52 consecutive years, among the top five longest-running dividend-increase records in the S&P 500 index.
For more information, visit the company’s web site:
www.parker.com
Parker Acquires German Composites Technology Company
February 11, 2009 by R. Nelson Parrish
Filed under Actuators, Cylinders
Cleveland, OH - Parker Hannifin Corporation (NYSE: PH) announced that it has acquired Lingk & Sturzebecher of Stuhr, Germany. The acquired company, better known regionally as L&S, is a manufacturer of light weight carbon fiber high pressure cylinders and actuators including those based on composite technologies, for aerospace, mobile and industrial markets. This composite material technology will enable Parker to develop hydraulic components with significantly reduced energy burden for the power systems of machines equipped with hydraulics.
Terms of the transaction were not disclosed. The acquisition is expected to be accretive to earnings in its first full year of operations. Sales will be reported in Parker’s Industrial International reporting segment. In the fiscal year ended December 31, 2007, L&S achieved 7.6 million euros (approximately $11.2 million) in sales.
L&S will become part of the global operations of Parker’s hydraulic technology business. It will complement a broad line of hydraulic components and systems including pumps, motors, valves, cylinders, hydraulic drives, electronic controls, energy recovery systems, vehicle cooling and engine management systems.
Safety Locks Lift Italian Opera House Stage
February 10, 2009 by R. Nelson Parrish
Filed under Cylinders, Equipment
With theater performances, the illusion of a reality on a stage must be preserved seamlessly and without visual distraction. Safety of the performers, however, must never be an illusion.
The stage lifts at the opera house in Genoa, Italy are equipped with safety locks to prevent movement in the event of power loss. The motion of these lifts, each capable of bearing loads to 100,000 lb, is maintained by hydraulic cylinders equipped with SITEMA safety locks Type KRG. In normal power-on conditions, pressure on the lock’s annular piston ensures free movement of the cylinder rod by holding the clamping sleeve released against the force of an integral Belleville spring assembly.
Safety locks were installed with these cylinders at a Italian opera house.
In a released position, that is, upon loss of power to the cylinder, the annular piston keeps the clamping sleeve pushed against the Belleville springs. The spring washers press the clamping sleeve into the taper of the housing, whereby an initial frictional force develops between the rod and the clamping sleeve. When load is applied, the force increases, so the higher the load, the stronger the clamping. In normal applications, the safety locks function best for loads from 2 kN to 500 kN (220 to 110,000 lb).
When the load acts on the rod, the rod movement is very slight. Even in the largest sizes, the movement does not exceed 2 mm (0.079 in.) for the permissible load. Against forces in the load direction, the higher the force the stronger the grip. When power is restored, the upward movement of the rod releases the clamping and a proximity sensor/switch detects the change and permits unimpeded downward motion.
Safety locks ensure that stages stay in place, even through a power loss.
The rod end used for these safety locks must be fitted with a lead-in chamfer and the rod surface should be hardened to at least HRC 52, burnished and within ISO tolerances f7 or h6, with a surface finish Rz=1 to 4mm or Ra 0.15-0.25mm. Hard chrome plating is recommended.
SITEMA
www.sitema.com
Rexroth Releases New Oil Control Cartridge Program Catalog
February 10, 2009 by R. Nelson Parrish
Filed under Equipment, Fittings, Valves
Bethlehem, PA - Bosch Rexroth’s Oil Control division, which manufactures a wide range of Compact Hydraulic products, has released a new 300-page catalog detailing its Cartridge Valve Program for the North American Market. The catalog provides engineering details on a complete range of screw-in type cartridges designed by Bosch Rexroth Oil Control to meet the needs of virtually any component or manifold application in hydraulic systems for mobile and industrial machinery.
The new Cartridge Program catalog, which can be downloaded from the Bosch Rexroth website, offers a product selection guide and comprehensive technical, dimensional and performance data.
Rated to 5000 psi (350 bar), Bosch Rexroth Oil Control’s cartridge valves feature compact design with optimized flow, pressure drop and leakage characteristics. All valves are precision-manufactured from high quality steel and are trivalent zinc-plated for RoHS compliant corrosion protection.
For more information, and to download the catalog visit www.boschrexroth-us.com/brh-m and in the Products section, select “Compact Hydraulics” followed by “Cartridge Valves” or click here.
Solenoid Operated Directional Control Valve
February 10, 2009 by R. Nelson Parrish
Filed under Valves
Macomb, MI – Nachi America Inc.’s SK-G01 Series Wet Type Solenoid Operated Directional Control Valves are suited for outdoor hydraulic equipment applications. Featuring high dust and water resistance (JIS C 0920 IP67), as well as vibration proof performance (JIS D 1601 3 D Grade 90 Division 400), the SK-G01 withstands environmental elements for long-term reliability.
Nachi’s SK-G01 is designed to include a Deutsch connector. The valve offers large capacity and high pressure with minimal pressure loss and low switching noise. These competitively priced valves are also available in shockless types and with diode built in coils.
Maximum flow rates range from 50.0 to 100.0 L/min for standard types and from 40.0 to 50.0 L/min for shockless types. Maximum working pressure is 35 MPa for standard types and 25 MPa for shockless types.
