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 […]

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 […]

Tips for Safe Hydraulic Operation

Some essential precautions necessary for the safe operation of hydraulic systems are enlisted below: Design and build hydraulic systems with safety in mind, Select hydraulic components and fluid conductors that are rated for the highest system working pressure, Position valves, safety guards, and controls with the operator’s safety in mind, Know the hazards involved in […]

Troubleshooting Chart for Hydraulic Cylinders

Most of the hydraulic system failures are similar. That is there is a sudden or gradual loss of pressure or flow. Consequently, cylinders and motors in these systems may stop working. Any of the system components can be at fault. Possible causes of hydraulic cylinder faults and their rectification are highlighted below: Possible causes Rectification […]

Safety in Hydraulic Systems

Any hydraulic system is inherently dangerous, as an enormous amount of energy is transmitted through the high-pressure system. There are many hazards associated with hydraulic systems. The safety of personnel must be ensured while they are operating and maintaining hydraulic systems. Every operator of hydraulic systems has the right to know the hazards of his/her […]

PLC Communication Services

A PLC system is configured using several networked components, such as PLCs, computer, communication modules, and HMI, with communication interfacing capabilities. These components can exchange data between two or more communication partners through the network using specific protocols for handling the data traffic. A network is characterized by the type of hardware involved, communication procedure, […]

Proximity Sensor Circuit Technology

Discrete output proximity sensors are most important for industrial applications. They gain importance in such applications where it is necessary to record or count moving objects or work-pieces on machines or conveyors. Based on the way of connection of the final output amplifier transistor of a discrete proximity sensor to the power supply terminals, proximity […]

Hydraulic Seals

Seals (or packings) are deformable materials sandwiched between the mating surfaces to close of their small gaps. They retain fluid under pressure within the system and keep foreign matter out. They prevent the metal-to-metal contact of sliding surfaces. They are made from polymer materials that are flexible (rubber) and soft (plastics). The elastomeric quality enables […]

Hydraulic Fluid Cleanliness Standards

The cleanliness of hydraulic fluids needs to be monitored for maintaining the components of hydraulic systems at a satisfactory level. Many national and international organizations such as ISO, SAE, National Aerospace Standards (NAS), etc., have developed standards for specifying the particle size classification and contamination concentration levels in hydraulic fluids. All standards specify the contamination […]

Design of Industrial Hydraulic Systems

Design of Industrial Hydraulic Systems in the SI Units By Joji Parambath The book describes the design aspects of hydraulic systems systematically. It highlights the essential parameters and specifications of hydraulic components in SI units. Design Concepts in Industrial Hydraulic Systems in the English Units By Joji Parambath The book highlights the essential parameters and […]

Fittings for Hydraulic Fluid Conductors

Hydraulic Pipes Tubes and Hoses in the SI Units By Joji Parambath This book presents the necessary information about the configuration, performance specifications, and other details of pipes, tubing, and hoses and their fittings. The book uses the SI system of units. Pipes Tubes and Hoses in Hydraulic Systems in the English Units By Joji […]

Swing Clamp Hydraulic Cylinders

Hydraulic Cylinders in the SI Units By Joji Parambath This book deals with hydraulic cylinders of varying designs. The principles of operation, constructional details, and classification of the hydraulic cylinders are explained in detail. This chapter also covers the topics on the position transducers, swing clamp cylinders, applications, design aspects of hydraulic cylinders, advantages, and […]

Hydraulic Power Packs – Essential Features

Hydraulic Power Packs in the SI Units By Joji Parambath The book deals with power pack components such as hydraulic reservoirs, pumps, pressure relief valves, unloading valves, filters, accumulators, and power pack control units. It also presents the noise reduction techniques for hydraulic systems. Next, the book highlights power packs with standardized assemblies. The book […]

Hydraulic Filters – Construction and Specification

Textbook on ‘Hydraulic Filters Construction Installation Locations and Specifications’ By Joji Parambath The textbook presents information on the construction, installation locations, and specifications of hydraulic filters, in detail. Please click on the image links to go to the Amazon Website Hydraulic filters need to be the integral parts of every hydraulic system to ensure the […]

Preventive Maintenance of Pneumatic and Hydraulic Systems

Textbook on ‘Maintenance Troubleshooting and Safety in Pneumatic Systems By Joji Parambath The book highlights all aspects of maintenance, troubleshooting, and safety in pneumatic systems, systematically. A section on energy saving highlights the steps that need to be taken for saving a substantial amount on energy costs. Textbook on ‘Maintenance, Troubleshooting and Safety in Hydraulic […]