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Environmental Effects of Hydraulic Fluids

In every hydraulic system, a tightly confined incompressible fluid medium is used to transmit energy from the power pack to the actuators in the system. The fluid medium is formulated from a base stock and additives. The base stock should possess all the essential characteristics to perform well in a particular class of hydraulic systems. […]

Filtration Principles of Pneumatic and Hydraulic Systems: A Comparison Study

This article is the third part of the following three-part series of articles: Filtration and Drying Principles in Pneumatic Systems Filtration Principles in Hydraulic Systems Filtration Principles of Pneumatic and Hydraulic Systems: A Comparison Study The filtration principles of pneumatic and hydraulic systems were given in the previous articles. The third part of the three-part […]

Filtration Principles in Hydraulic Systems

This article is the second part of the following three-part series of articles: Filtration and Drying Principles in Pneumatic Systems Filtration Principles in Hydraulic Systems Filtration Principles of Pneumatic and Hydraulic Systems: A Comparison Study A hydraulic power system transmits the power in a controlled manner using an incompressible oil medium. Remember, the fluid medium […]

Filtration and Drying Principles in Pneumatic Systems

This article is the first part of the following three-part series of articles on filtration: 1. Filtration and Drying Principles in Pneumatic Systems 2. Filtration Principles in Hydraulic Systems 3. Filtration Principles of Pneumatic and Hydraulic Systems: A Comparison Study A pneumatic power system transmits the power in a controlled manner using a compressed air […]

Compressed Air Dryers

The natural water vapor content of air is concentrated and is carried through the compression process in a compressor as a vapor in high temperatures. A proper means of dehydration must be incorporated in the conditioning of compressed air where demands of high quality compressed air are entailed. A dryer can be used to receive […]

Bladder Accumulators – Basic Constructional Features and Specification Parameters

This article can be downloaded by clicking the link here A bladder accumulator consists of a seamless cylindrical pressure vessel (shell), internal elastomeric bladder, poppet valve, fluid (oil) port, charging valve, and clamps and brackets. A schematic diagram of a bladder accumulator is shown in the figure below and the basic constructional features and specification […]

Mounting Configurations of 4-port Hydraulic Directional Control Valves

[This is an extract of the article on ‘Mounting Configurations of 4-port Hydraulic Directional Control Valves’ authored by Joji Parambath. Full article can be downloaded by clicking the link here] Table 1 presents the size designations, port sizes, and nominal flow rates for different sizes of 4-port hydraulic directional control valves according to the DIN […]

Constructional Features of Hydraulic Cylinders

Hydraulic cylinders are designed to operate at high pressures and handle high loads in demanding operating conditions. Therefore, they need to be constructed with materials of high strength, expert workmanship, and advanced features to provide ruggedness, high quality, maintenance-free operation, and long service life. Some of the features of cylinder construction are presented below to […]

Side Loads in Hydraulic Cylinders

A long-stroke hydraulic cylinder often experiences significant side-load forces while in operation, especially when it is fully extended. The side load in the cylinder is the force component that acts laterally across the axis of its bearings, piston-rod seals, or piston. Many reasons can be attributed to the development of side loads on the cylinder. […]

Troubleshooting Chart for Hydraulic Pumps

The preventive maintenance is carried out on hydraulic systems to keep them in a perfect working condition at all times. However, faults or breakdowns do occur in hydraulic systems, which have to be traced and corrected with minimum delay and expense. Table below gives pump malfunctions and their potential causes and rectification. Disturbances Possible causes […]