2020 Course Dates:
This is a 5-day training program that teaches maintenance personnel the principles of industrial hydraulics technology including basic calculations for fluid pressure and flow and actuator velocity/rpm. Starting with the practical ideas of force, area, pressure, fluid flow rate, cylinder speed, hydraulic motor speed, hydraulic power, and hydraulic system heat production, students develop their understanding of how hydraulic powered and controlled machines work.
Students learn about all of the major groups of hydraulic components. They will learn the function and principles of operation of direct-operated and pilot-operated relief valves, direct operated and pilot operated pressure reducing valves, direct operated and pilot-operated directional control valves, check valves, pilot operated check valves, fixed displacement pumps, variable displacement pumps, and accumulators.
Students develop their understanding of the 12 basic hydraulic circuits most often used in industrial hydraulic systems. These circuits are system relief circuits, multiple system pressure relief circuits with low-pressure vent, port relief (intensification relief) systems, cross port relief circuits, counterbalance circuits – with and without load holding P.O. checks, sequence circuits, high-low pump unloading circuits, load sensing circuits, pressure compensated variable displacements pumps with safety relief valves, regenerative systems, and meter-in vs. meter-out speed control (throttle valve principle) and accumulators as auxiliary flow sources (accumulator safety blocks).
A substantial amount of time is devoted to teaching students how to ‘read’ and interpret hydraulic symbols. This is accomplished through the use of special handouts of ISO standard symbol diagrams.
There will be a brief introduction to the operation and application of electro-proportional hydraulic pressure control valves and directional control valves
This 5-day training program is approximately 50% lecture and 50% hands-on lab exercises. The lab exercises reinforce the student's understanding of hydraulic valve functions and of the hydraulic circuits previously listed.
Level 1 Hydraulic Training Course Overview
- What is a hydraulic powered and controlled machine
- Introduction to Industrial Hydraulics Technology
- Understanding hydraulic energy and hydraulic power – Heat production of hyd. sys.
- Relationship of force, area, and pressure – Pressure to develop force and tonnage
- Relationship of torque, displacement, and pressure for hydraulic motors
- Relationship of fluid flow, GPM and actuator speed
- Hydraulic component symbol interpretation (on-going throughout the seminar)
- Reading and interpreting hydraulic schematics – techniques (on-going throughout the seminar)
- Basic fluid power calculations related to fluid pressure, fluid flow, actuator velocity/rpm, hydraulic power and heat production
- How hydraulic speed control works (throttle valve principle)
- Hydraulic shock, how it is caused and requirements to control actuator acceleration and deceleration
- Understanding relief valves – direct operated, pilot operated and venting options – piloting and draining options and they effect the function and application
- System relief circuits, multiple system pressure relief circuits, port relief circuits, cross port relief circuits
- Lab exercise – comparing pressure relief characteristics between 3 different relief valves, Lab exercise – setting system pressure, Lab exercise – externally piloted relief valve with venting option, Lab exercise – multiple system pressure
- Understanding directional control valves – direct operated and pilot operated types – spool – spool types and their uses – 2 position vs. 3 position valves – piloting and draining options and how they effect the function and application
- Lab exercise - meter-in vs. meter-out speed control, Lab exercise – understanding pilot operated directional control valves
- Regenerative circuits
- Pressure reducing valves, application and operation
- load sensing with hydrostats (pressure reducing valves)
- Lab exercise – pressure reducing valves, Lab exercise – load sensing
- Multi-function valves, function, and application
- Sequence circuits, counterbalance, unloading applications
- Lab exercise – sequence circuit, Lab exercise – sequence circuit requiring force limitation
- Hydraulic cylinder and hydraulic motors – how to identify cylinder piston seal failures
- Hydraulic pumps – fixed displacement, variable displacement types – basic pump controls
- Pressure compensated pumps with spike pressure relief valves
- Lab exercise – setup of a pressure compensated pump and safety relief circuit
- Accumulator operation, precharge, and evaluation – accumulator safety relief circuits, Lab exercise (or) class demonstration – Checking and setting accumulator precharge pressure
- Introduction to electro-proportional hydraulic pressure control valves and directional control valves – understanding the process control function of a proportional valve