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December 2012 Hydraulics & Pneumatics

Editor's Page

  • Dec. 10, 2012
    Commentary

    The future of fluid power? 2

    Don’t look at me; your guess is as good as mine. But I think we all would agree that fluid power is a mature industry that goes through incremental advancements. Digital microprocessors have made huge contributions to automated control, and new component designs and manufacturing techniques have advanced the physical capabilities of both hydraulic and pneumatic systems....More

Industry News

  • Dec. 5, 2012
    blog

    AG CONNECT 2013

    Plan to attend...More
  • Nov. 7, 2012
    News

    Young Powertech develops partnership with STM

    Young Powertech Inc., Garnet Valley, Pa., recently created a new partnership with STM, Bologna, Italy, a major manufacturer of mechanical transmission devices, particularly planetary drives and gearboxes. Through the alliance, Young Powertech becomes STM’s exclusive North American partner....More
  • Dec. 10, 2012
    Article

    William W. Tulloch Jr., fluid power distributor

    William (Bill) W. Tulloch Jr., past president and CEO of RHM Fluid Power, Westland, Mich., passed away last month. He was 82. Tulloch Jr. began his fluid power career with Racine Hydraulics, and in 1960  joined the newly formed organization of Racine Seco Sales, Detroit....More

Ideas & Applications

  • Dec. 10, 2012
    Article

    Hydraulics handles the hassle of hauling helicopters

    Helicopters rise straight up when they take off. That’s the beauty of these aircraft, they don’t need a long runway to become airborne. And because of this, the majority of helicopters (except for some larger models) are manufactured without wheels. They are fitted with landing skids instead....More
  • Dec. 10, 2012
    Article
    Hydraulics & Pneumatics

    Retract clamping protects piston rod

    When the high force potential of hydraulics is not required — such as clamps for spot welding — pneumatics is a natural. Pneumatics is fast, reliable, fire-proof, and unaffected by the immense electrical noise generated by spot welding guns....More

Motion Control

  • Dec. 10, 2012
    Article

    Hydromechanical resonant frequency and cylinder speed 2

    The hydromechanical resonant frequency (HRF) of a valve-cylinder circuit is an interesting concept and an important value to know. If a cylinder is stroking, and its control valve suddenly shifts to block flow, the cylinder and its load will vibrate, usually with considerable noise and sometimes with considerable violence. This is HRF in action. The noise arises from the resonance that exists when the kinetic energy of the load mass and the potential energy stored in the hydraulic fluid’s compressibility are exchanged....More

Features

  • Dec. 12, 2012
    Article
    Hydraulics & Pneumatics

    It’s a material world

    To ensure a leak-free connection, five factors must be carefully considered in selecting the best fitting style and material for an application. These include Size, Temperature, Application, Media, and Pressure (STAMP). The acronym STAMP is an easy tool to use for determining the proper fitting and material. Although this article deals primarily with determining what is the right fitting material for an application, all five STAMP parameter considerations are important in making the best fitting material and type determination....More
  • Dec. 11, 2012
    Article
    Hydraulics & Pneumatics

    Avoiding the down and dirty

    To avoid severe vibration and premature failures, rail and truck shipping containers are subjected to vibration testing. However, failures often occurred because testing was originally only done on the X, Y and Z axes. Studies indicated that the pitch, roll and yaw axes simultaneously exert significant forces that can cause premature product efficiencies, normally attributed to design deficiencies....More
  • Dec. 11, 2012
    Article
    Hydraulics & Pneumatics

    Advantages of hydraulics for motion bases 1

    Motion bases for aircraft and other types of  simulators demand a combination of rapid acceleration and deceleration, tight positioning control, long life, and, of course high reliability. The larger the mass that needs to be moved, the more likely the motion base will use hydraulics. Manufacturers have been able to increase the capacity of electromechanical actuators, so they present them as preferable to electrohydraulic systems....More

Automate with Air

  • Dec. 11, 2012
    Article
    Hydraulics & Pneumatics

    Piezo valves foster medical mobility 13

    The growing trend towards mobile healthcare and equipment for home use means medical devices must get smaller, lighter, and more durable. That has med-tech engineers looking to piezoelectric valves for pneumatic applications. Piezo valves offer advantages over solenoid valves such as smaller size, higher efficiency, and quieter operation, and they are well-suited for controlling flow and regulating vacuum and pressure....More

The 2012-2013 Compressed Air Handbook

  • Jan. 1, 2012
    Article
    Hydraulics & Pneumatics

    Air regulators

    Air regulators are special valves that reduce supply pressure to the level required for efficient operation of downstream pneumatic equipment....More
  • Jan. 1, 2012
    article
    Hydraulics & Pneumatics

    Compressed air efficiency

    Carefully engineered responses to compressed-air demand will result in more efficient systems and savings in operating costs....More
  • Dec. 11, 2012
    Article

    Benefits of plastic connectors

    Industrial and laboratory OEM designers are constantly being challenged to come up with more versatile, user-friendly, light weight and cost-effective product solutions for their equipment and instrumentation. An important component in this design process is the selection of tubing connectors for the transfer and management of compressed air and other fluids, particularly for mission-critical applications....More
  • Jan. 1, 2012
    Article
    Hydraulics & Pneumatics

    Air receivers

    Every compressed air system needs a receiver, but the receiver alone is not always the answer to energy efficiency in the system....More
  • Dec. 12, 2012
    Article
    Hydraulics & Pneumatics

    Vacuum goes to work

    CBW Automation, Fort Collins, Colo., a manufacturer of high-speed automated retrieval systems uses vacuum and suction cups to grip and transport products coming out of plastic-injection molding machines. The OEM had been using rotary vane pumps to generate vacuum for the machine, but designers wanted a more energy efficient solution — and one with less required maintenance. An efficient and reliable vacuum source is critical for serving high-production machines, so designers switched to venturi-type air-driven pumps....More

Useful Products

  • Dec. 11, 2012
    Product
    Hydraulics & Pneumatics

    Digital pressure gauge

    DG25 digital pressure gauge provides a five full-digit LCD in ranges to 25,000 psi. Available in accuracies of 0.5% and 0.25% FS, it offers minimum battery life of 2000 hours. Standard features include an IP67 enclosure, selectable units of measure, a 20 segment bar graph indicator, min-max, tare, and a list of agency certifications....More
  • Dec. 12, 2012
    Product
    Hydraulics & Pneumatics

    Explosion-proof valves

    Stainless-steel electrohydraulic valves feature corrosion-resistant external and internal parts to withstand extreme and corrosive environments and ensure compatibility with water-based fluids and pure water....More
  • Dec. 12, 2012
    Product
    Hydraulics & Pneumatics

    Brushless dc compressor

    Thomas 2220 series brushless dc oil-less air compressor is designed for medical and other applications requiring a compact, lightweight compressor with variable output. It is small — 3.77 in. high × 2.64 in. wide × 4.70 in. long — and weighs only 1.48 lb (0.7 kg)....More
  • Dec. 12, 2012
    Product
    Hydraulics & Pneumatics

    Hydraulic oil coolers

    HC series of hydraulic motor-driven oil coolers feature low-fouling, non-louvered air fins. Fan motors may be operated at a variety of oil flows to reduce noise levels or simplify installation. Fan speed may be changed by increasing or decreasing the oil flow rate to the hydraulic motor driving the fan....More
  • Dec. 12, 2012
    Product
    Hydraulics & Pneumatics

    Directional control valves

    Series 503 pneumatic directional control valves with ultra-high flow ratings are designed for automation and piloting applications. They are available in spool-and-sleeve or rubber seal models, and proprietary or ISO versions....More
  • Dec. 12, 2012
    Product
    Hydraulics & Pneumatics

    Hose assembly

    Rapid Assembly quick-to-connect hose and fitting system for low-pressure hydraulic and pneumatic systems improves assembly time, connector costs and system weight. It consists of Parflex 515H hose and Parker RA (Rapid Assembly) quick connecting hose fittings and adapters....More
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