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Pressure is the essence of fluid power. The ability to condense matter and move it around is how hydraulic and pneumatic systems are capable of the power and motion inherent in them. Most fluid power systems have at least one pressure gauge, while others can have dozens of locations with test points where a pressure gauge can be attached while the machine is running. Pressure is measured in both hydraulic and pneumatic systems with the same type of pressure gauge.
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Many fluid power systems fail simply because there is too much contamination in the medium. In fact, some estimate that 75% of all fluid power failures can be attributed to contamination issues. This is why no fluid power system can be complete without the use of a filter. Hydraulic filters keep the hydraulic fluid contaminant free. By and large, hydraulic filters are used in three primary functional locations: return lines, pressure lines and off-lines.
Download this design guide to learn more about the many types and styles of filtration that exist, sizing tips, common terms, symbology, and more.
Valves exist in nearly every industry, from automobile engines to the foundries that cast the engine’s valves. A hydraulic valve is a device that opens and closes to allow the flow that will move actuators and loads. It sounds simple, but there are various techniques used in hydraulics to allow this to occur. Valves can be mechanically operated (by handle, knob or cam), electric solenoid-operated, or pilot-operated (air or hydraulic pressure actuates the valve).
Pneumatic actuators, or cylinders, work to power automated systems, machines, and processes in industrial, medical, laboratory and other challenging applications. They provide either rotary or linear force and motion to move or turn a machine function, or provide the precision and power for pick-and-place systems.
In this Design Guide, the editors of Fluid Power World provide tips on the different styles available, sizing and selection, and special uses in automation and sensing.
Cylinders are responsible for converting hydraulic power into linear motion to do work or move a load by applying pressure to the cylinder’s piston. These somewhat simple devices usually feature a basic construction, including a piston inside a cylindrical or rectangular tube or body, end caps and housings, as well as necessary bolts, nuts, plugs, bearings, rod seals and wipers, and more.
In this Design Guide, the editors of Fluid Power World provide tips on sizing, selecting, mounting and maintaining these workhorses of fluid power.
HYDRAULIC HOSE ASSEMBLY
ELECTRO-PNEUMATIC REGULATOR & FLOW
Hydraulic pumps are one of the most necessary components in a hydraulic system, as it is the pump that converts mechanical energy into hydraulic energy.
In this Design Guide, the editors of Fluid Power World provide tips on the different styles available, sizing and selection, symbology depiction, and special uses particularly in mobile machinery.
In this Design Guide, you'll learn how selecting and installing hose assemblies requires a great deal of thought and care. A hose assembly is composed of the hose and the end fittings, which are determined by the application in which the hose assembly is going to be placed. With hose selection, consider the pressure rating, temperature range, cover material and bend diameter. You must also know key specifications such as ID, OD and fluid requirements.
Electronic air pressure regulators and air flow control valves control air and/or vacuum pressure in proportion to an electric signal. They accept a variety of electronic analog and digital signals to control pneumatic pressures and flows accurately. They also help negate the effects of vibration, mounting position or environmental concerns. Flow controllers usually control the flow of air to an actuator for precise extend, retract or rotation speeds.
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