Load Sensing Hydraulic Systems

FLUIDSYS TRAINING CENTRE

You may download this article at: https://fluidsys.org/downloads/ ]

A conventional hydraulic system with a fixed-displacement pump provides a constant flow through the system. When the system develops the set pressure, the pump flow is bypassed through the associated pressure relief valve. As a consequence, the system generates tremendous amount of heat. Even when a variable-displacement pump is employed, the system produces considerable heat. A sophisticated solution to improve the efficiency is to add a load sensing feature to the system.

The hydraulic system with a load sensing feature provides only the flow and the pressure as required by the connected load. Controlling both the pressure and the flow allows for a significant reduction in losses, improvement of circuit efficiencies, and enhancement of the service life of the system. The principle of load sensing is widely used in mobile hydraulic systems, including tractor systems, trucks, and cranes. It is also…

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Typical Single Cylinder Pneumatic Circuits

For more information, please read any of the publications: Pneumatic Systems and Circuits -Basic Level (In the SI Units) Industrial Pneumatics -Basic Level (In the English Units) This blog provides the following self-explanatory basic pneumatic circuits with only a single cylinder. Direct control of a single acting cylinder Indirect control of a single acting cylinder... Continue Reading →

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

Textbook on ‘Pneumatic Systems and Circuits -Advanced Level’ By Joji Parambath The textbook presents information on the classification, constructional features, working, and essential terms and definitions, sizing, and safety and maintenance aspects of hydraulic accumulators. The book uses the SI system of units. Please click on the image link to go to the Amazon.com Website... Continue Reading →

TUV Rheinland Certified Qualification – Professional in Pneumatics and Hydraulics – Advanced Level

Fluidsys Training Centre Pvt Ltd Bangalore, India 2019-20 To see our publications, please visit: jojiboks Fluidsys Training Centre, Bangalore offers an advanced-level course in the field of Pneumatics and Hydraulics. The systematic training offered by the training centre is mainly intended for Degree/Diploma holders in the Mechanical, Electrical, Electronics, and Computer Science branches. After successful... Continue Reading →

Hydraulic Filters

FLUIDSYS TRAINING CENTRE

[You may download this article at: https://fluidsys.org/downloads/ ]

The article explores the topic of hydraulic filters for educational use and is presented here to refresh your memory. Hope you are able to recall the constructional features, performance specifications, and location-based installation details of hydraulic filters quickly. Let us get down to the nitty-gritty of hydraulic filters…

Introduction

Modern high-pressure hydraulic systems with components built to closer tolerances are susceptible to many types of contamination. Contaminants can cause the premature wear of internal surfaces. They also promote leakage and clog the flow paths. Therefore, an efficient and correctly-sized filtration system should be an integral part of every hydraulic system to separate the particulate matter of a specified size or greater from the system fluid. They should be fitted at appropriate locations in the hydraulic circuit for the effective control of contamination.

Strainers and Filters

A filtration unit, such as a…

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Relay Controllers Vs PLC Controllers – An Insight into their Circuitry

For more, please read our publication 'Electro-Pneumatics and Automation' Electro-pneumatics and Automation The basic concepts of a relay control system and a PLC control system are highlighted in this article with the help of a circuit diagram. Assume that an electro-pneumatic system is used for obtaining an industrial work operation. The system consists of a... Continue Reading →

Hydraulic Reservoirs

The article provides a concise account of the constructional details of hydraulic reservoirs. As you are aware, a hydraulic reservoir is an essential part of a hydraulic power pack.  A complete range of 32 textbooks, in Paperback & Kindle eBooks Editions, on Pneumatics and Hydraulics, under Fluid Power Educational Series, authored by Joji Parambath has... Continue Reading →

Understanding Air Compressors – Part 3

Bits and Pieces: Fluid Power Fact #4/3 Understanding Air Compressors – Part 3  [Note: Part 1 of this article presents basics of air compressors. Part 2 presents the classification and the construction details of air compressors. Part 3 presents a brief about the sizing of air compressors.] Sizing Air Compressors Sizing an air compressor for... Continue Reading →

Understanding Air Compressors – Part 2

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 Please click on the image links to... Continue Reading →

Understanding Air Compressors – Part 1

Bits and Pieces: Fluid Power Fact #4/1 Pneumatic Systems and Circuits -Basic Level in the SI Units By Joji Parambath The book describes the topics on compressed air generation and contamination control, pneumatic actuators, and control valves, in detail. Many single-actuator control circuits are presented. Further, the book presents the maintenance, troubleshooting, and safety aspects... Continue Reading →

Know the Difference between Gauge Pressure and Absolute Pressure

Bits and Pieces: Fluid Power Fact #3 Know the Difference between Gauge Pressure and Absolute Pressure Two pressure scales are utilized to measure pressure values in fluid power systems: a gauge scale and an absolute scale. The gauge pressure is the pressure indicated by a pressure gauge. It is a measure of the pressure with... Continue Reading →

What is the Most Economical Pressure in Pneumatics?

Bits and Pieces - Fluid Power Fact #1: What is the Most Economical Pressure in Pneumatics? Pneumatic systems have been developed and progressed comparatively as a low-pressure system. Pneumatic air consuming devices such as cylinders and rotary actuators are designed for the maximum operating pressure of 8 to 10 bar [115 to 145 psi]. However,... Continue Reading →

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 32 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 →

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 →

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