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A Comparative Study of Pressure Control Valves

Pressure control valves are used in hydraulic systems for obtaining pressure-related regulation and control tasks. The control tasks include limiting the maximum operating pressure in a hydraulic system, reducing the pressure in a part of a hydraulic circuit, unloading pumps, establishing the sequence movements of actuators, counterbalancing overrunning loads, and braking hydraulic motors while running […]

Essential Relations in a Pump–Cylinder Hydraulic System

The figure below gives the summary of useful relations (SI units) of a pump-cylinder hydraulic system for highlighting their correlations. Joji Parambath Author / Trainer joji.p@hotmail.com Note: Several essential mathematical relations are also given in books ‘(1) Industrial Hydraulic Systems and Circuits -Basic Level (In the SI Units), (2) Industrial Hydraulics -Basic Level (In the […]

Pneumatic Stepper Sequencer – Design and Operating Principles

A multi-actuator pneumatic system may use many logic functions in its associated controller for obtaining a sequence of work operations. The sequential steps can easily be realized in a modular fashion using step modules. A step module is a unit designed as per the functional requirements of each step of the control sequence. As you […]

Manufacturing Process of Hydraulic Cylinders – Salient Points

Hydraulic cylinders are used in many types of machines and systems for industrial and mobile applications. The manufacturing process of cylinders mainly involves the following steps: design, heat treatment, machining, coating, assembly, and testing. The Design Phase, Cylinder Manufacturing In the design stage, the requirement specifications of the cylinder to be designed are transformed into […]

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 […]