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Hydraulic System Maintenance: Key Activities and Safety Precautions

Hydraulic systems are commonly used in industrial and mobile systems and consist of power packs, control valves, actuators, fluids, and other essential and optional components. These systems can fail due to reasons like fluid contamination, insufficient fluid, use of the wrong fluid, leakage, loose connections, excessive heat or pressure, and cavitation. So, the importance of […]

Innovative Evolution of Cartridge Valve Technology

The content provides a comprehensive overview of cartridge valves, including their design, symbols, and examples of circuits. It effectively explains the fundamental concepts, control covers, and types of cartridge valves, making it valuable for readers interested in the topic.

Circuits for Closed-circuit Hydro-static Transmissions (HSTs)

In a closed-circuit hydrostatic transmission (HST) system, a hydraulic pump drives a hydraulic motor. In the closed-circuit HST system, the fluid discharged from the hydraulic motor outlet flows directly to the pump inlet, thus forming a power transmission loop. The transmission loop has a high-pressure side and a low-pressure side. The pressure on the high-pressure […]

Textbook – Hydraulic Circuits -Identification of Components and Analysis by Joji Parambath – Sample Pages

The textbook describes a wide range of hydraulic circuits. Most of the circuits are in multiple positions and with colors used for flow paths and current paths for easy learning. The book in paperback and hardcover versions is available in all Amazon marketplaces.

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 summarizes useful relations (SI units) of a pump-cylinder hydraulic system to highlight 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 English Units), (3) […]

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 […]