Hydraulic Fluid Contamination & its Control

Hydraulic fluids are subjected to various kinds of contamination (particles, water, air, compounds, and biological matters). Contaminants can affect the physical and chemical properties of fluids. If the contaminants are not monitored or controlled, the fluid is likely to be subjected to various kinds of failures. A complete range of 36 textbooks, in Paperback &... Continue Reading →

Hydraulic Fluids – Functions, Characteristics, & Categories

Modern hydraulic applications demand compact machines designed with tighter tolerances and that run at faster cycle times. They are designed to work with small amounts of fluids. They operate at higher pressures, temperatures, and speeds. Under these circumstances, fluids are subjected to severe stresses. Hydraulic Fluids By Joji Parambath The textbook presents information on the... Continue Reading →

How to Develop Multiple-actuator Pneumatic Circuits Using the Cascade Method?

Most of the practical pneumatic systems involve the use of multiple actuators (cylinders, semi-rotary actuators, etc) which when operating in specified sequences carry out the desired control tasks. Double-pilot directional control (DC) valves are used as final control elements to control the forward and return strokes of the actuators. Sensors are used for confirming the... Continue Reading →

Relay-based Electro-hydraulic Systems

In the electrical actuation of a hydraulic valve, the necessary actuating force is obtained electrically with the help of a solenoid. The off-centre core of the solenoid coil is pulled towards the centre of the coil when the electric current is passed through it. This discrete movement of the core is used to actuate the... Continue Reading →

Pressure Control Valves in Hydraulic Systems

The article looks at the basics of pressure control valves for educational use and is presented here to refresh your memory. Hope you are able to recall the functions, circuits, and applications of pressure control valves. Pressure control valves are used in hydraulic systems for obtaining pressure-related control functions.  Pressure control valves can be categorized... Continue Reading →

Hydraulic Filters

For more details, please read our publication: 'Hydraulic Filters: Construction, Installation Locations, and Specifications' Hydraulic Filters: Construction, Installation Locations, and Specifications The article explains the constructional features,  location-specific installation details, and performance specifications of hydraulic filters.  Introduction Modern high-pressure hydraulic systems with components built to closer tolerances are susceptible to many types of contamination. Contaminants... Continue Reading →

Electro-hydraulic Servo Valve Systems

Hydraulic systems driven by servo valves provide highly accurate control over enormous forces. A servo valve system consists of a transducer, a servo amplifier, a servo valve, and an actuator with a connected load. It is a closed-loop system used for the precise control of the output (load) parameter, such as position, velocity, or force,... Continue Reading →

What is Cavitation?

Cavitation is a harmful condition that occurs in the component like a pump or a valve of a hydraulic system when the existing space in the working component is not filled with the system fluid. It is the process of formation and collapse of vapor or air bubbles in the pumped fluid as it passes... Continue Reading →

Hydraulic Accumulators

A hydraulic accumulator mainly consists of a chamber in which a fluid is held under pressure by a spring or a raised weight or a volume of compressed gas (nitrogen). It is, thus, possible to store potential energy in the accumulator, when the associated system pressure is greater than that of the accumulator. A hydro-pneumatic... Continue Reading →

Fluid Power – Fascinating Points (#1)

Fluid power provides the muscle for various work operations involved in stationary as well as mobile applications. As we can see, the use of fluid power is widespread in many applications. Many of the operators, technicians, and engineers are ignorant of the operational, maintenance, and safety aspects of fluid power. Therefore, proper training is essential... Continue Reading →

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