32,214 Hydraulic Equipment Users Can't Be Wrong...
What Do You Do When Your Hydraulic Machine Breaks Down at 10pm on a Sunday Night?
Don't worry - now you can have a hydraulics expert at your disposal 24 hours a day, 7 days a week, 365 days a year for next to nothing... AND $185 of FREE stuff if you read this NOW!
hydraulics author, educator and publisher.
Dear Hydraulics User,
Does your hydraulic equipment ever let you down?
Not yet, maybe. But just like every other type of mechanical equipment, it can give trouble at any time. And when it does, you need the right expertise. Trouble is...
Good Help is Hard to Find
But now YOU CAN have a hydraulics expert at your disposal 24 hours a day,
7 days a week, 365 days a year - and for peanuts. His name is Peter Rohner. And he's a hydraulics engineer with 42 years
of experience - experience that can save you a bundle.
Take, as an example, seal failure in hydraulic cylinders. Do you know that 26 percent of cylinder seal failures are
caused by bent rods? There are a number of reasons why cylinder rods bend. Peter Rohner shows you how to determine the underlying cause and the ways to correct it - on pages 58 and 59 of his hydraulics book.
During his 26 years as a University lecturer, thousands of people have gained from Rohner's expertise. And through his books on hydraulics and pneumatics, tens of thousands more have profited from his knowledge. You will too.
Now in its fourth edition and with 32,214 copies in print, Rohner's book is possibly THE most popular hydraulics manual on the planet. Heck, it's even been translated into Turkish! But don't let me tell you how good it is - here's a small sample of what others have said:
"As a mechanic with more than 30 years experience,
I think Industrial Hydraulic Control is excellent, very comprehensive and I use it as
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Equipment Maintenance Supervisor
Oilfield Service Company
"Industrial Hydraulic Control was the recommended text I purchased
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Gary K. Nathan
Project Support & Facilities Maintenance
Even though it's title is 'Industrial Hydraulic Control', the
information it contains is just as relevant to mobile hydraulics. These days, topics such
as slip-in cartridge valves (logic elements), variable pump controls, proportional and servo control
and PLCs are just as relevant to mobile hydraulics as they are to industrial
And if you don't read much, it doesn't matter. This is not the type of book you sit down and read from cover to cover anyway. It's more like an encyclopaedia or dictionary. An expert reference you keep handy and refer to when you need to know something about hydraulics.
There is something in Industrial Hydraulic Control
for everyone - hydraulic equipment owner, mechanic, technician, engineer and student, from novice to pro. Here's what's included in each chapter, and the powerful knowledge you'll gain:
Did YOU know that 26% of cylinder rod-seal failures are caused by bent rods?
Shows you step-by-step, how to check cylinder rod-bending loads. PLUS - cylinder types, their construction and seal arrangements are all covered in detail. The chapter concludes with a discussion of cylinder regenerative circuits.
When you have pump problems this is the place to start.
Explanation of the construction and operating principles of different pump designs is expanded to include the seven factors you must consider when selecting a pump. AND you get the all the application formulas you need - with worked examples included.
Variable Pump Controls
Pump controls are complicated, right? WRONG!
Pressure-compensated, constant power (torque-limiting) and load-sensing control will no longer be a mystery to you once you've read this chapter. Pump control functions are illustrated with colour sectional views along with their corresponding graphical symbols.
When you have motor trouble turn to page 84.
Describes how torque is developed in a hydraulic motor and explains the construction and operating principles of different motor designs. The process of selecting and sizing a hydraulic motor is covered in detail, with all necessary formulas included. PLUS - the three most common motor control-circuits are illustrated and explained.
Directional Control Valves
Directional valves are simple, right? Nope.
This chapter explains the finer points of directional valve construction, operation and application: spool overlap and ring gap, valve mechanisms, switching positions, pathways, center and transition condition and actuation methods - just to name a few.
Hose and Fittings
Do you know a seven degree twist in a high-pressure hydraulic hose can reduce its service life by 90%?
Covers flow velocity and sizing, selection and rating of conductors (pipes, tubes and hoses), including metric tube and metric compression fittings.
Pressure Control Valves
What they do AND how they do it.
Covers the application and operation of direct-acting and pilot-operated relief valves - with and without remote pressure control, accumulator-unloading circuits, single and two-stage sequence valves, counterbalance valves and direct-acting and pilot-operated pressure reducing valves. Like all other chapters throughout the book, functional descriptions are illustrated with colour sectional views and their corresponding graphical symbols.
Cartridge Valves and Logic Elements
Do you know that logic elements can be configured for flow in two directions - but only one ensures leak-free operation?
This chapter will bring you up to speed on screw-in and slip-in cartridge valves. From the basics, right through to the configuration and control of logic elements for direction, flow and pressure control applications.
Flow Control Valves
How to navigate the flow control maze.
Explains the laws that govern flow rate through an orifice and discusses the use of needle valves as flow controls and their limitations. The operation of pressure and temperature compensated flow controls and their application in meter-in, meter-out, bleed-off and deceleration circuits are explained. PLUS - how a three-way flow control minimizes energy loss in a circuit. The chapter concludes with a practical discussion of flow-divider and priority flow-divider valves.
The quickest way to gain a comprehensive understanding of the most important component of every system.
Absolute and kinematic viscosity is explained and fluid properties such as viscosity index, pour point, oxidisation stability, lubricity, demulsibility, foaming resistance and air release are discussed. Special purpose oils are considered, including a comparison table for petroleum and alternative fluids. The chapter concludes with discussion of bulk modulus and decompression control.
What you MUST check to ensure you don't overlook the obvious.
Covers six common hydraulic problems and their root causes.
If you want to control contamination - then you must understand filtration.
Explains absolute, nominal and Beta ratings of filters and classification of fluid cleanliness. The difference between surface and depth filters is illustrated. PLUS - the chapter concludes with coverage of clogging indicators and pressure switches.
What you MUST KNOW about hydro-pneumatic accumulators.
Application guidelines and formulas for working volume and gas pre-charge. The chapter concludes with illustration and explanation of common accumulator circuits.
Proportional and Servo Control
If you want to know where hydraulics is heading, then this is essential information.
Proportional and servo valve construction and operation, valve characteristic definitions and control electronics are all covered in detail.
Why all hydraulic tanks are NOT made equal.
Explains the various functions of the reservoir, and covers reservoir sizing, design and construction. PLUS - the quickest and easiest way to calculate heat dissipation from the reservoir.
Pneumatic Logic Control
Even if this method of control is all new to you, you will make the transition from novice to pro in just one reading.
Benefits, application and operating principles of pneumatic logic control are illustrated and explained.
Programmable Logic Controllers
You don't need to be an electrician to understand PLC-controlled equipment.
This chapter will give you the knowledge you need. Operation fundamentals, logic functions, programming and integration considerations are explained in detail, with worked examples.
Here, you'll nail the fundamental principles of hydraulics as they relate to fluid
flow, velocity and pressure, and transmission of force and power. Concepts discussed are
cleverly illustrated and relevant formulas introduced.
Hydraulic Symbols and Formulas
And if all this isn't enough, the Appendix includes useful references such as: units of measurement and their symbols, commonly used hydraulics formulas, hydraulic symbols and conversion tables.
You're looking at a short summary of all that this popular book is going to teach you.
Industrial Hydraulic Control is the most practical and comprehensive reference on
hydraulics you'll lay your hands on. It's 280 pages (8.5" x 11") professionally printed and
bound with over 360 illustrations.
I frequently refer to this extensive resource in my
hydraulics consulting business - it tops the list for presentation and substance. In fact, I was so
impressed with this book, I bought the worldwide publishing rights!
A lifetime of hydraulics knowledge is yours
OK, you could spend years figuring all this stuff out for yourself. But why do it the hard way?
Especially when Industrial Hydraulic Control lays it all out for you in a logical,
Even if you're not into reading, it doesn't matter. This is not the kind of book you'd sit
down and read from cover to cover anyway. It's more like an encyclopaedia or dictionary.
You keep it handy and refer to it when you need to know something - about hydraulics.
I personally spend thousands of dollars every year adding to my technical library - and I've got
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