What Is Hydraulic Schematic Symbol? From What Standard?
Hydraulic schematic symbols, many people engaged in hydraulics will certainly be familiar with hydraulic symbols, which have a very important role in the hydraulic system. It can help engineers and technicians to quickly understand the working principle and each component of the hydraulic system.
In the process of my contact with customers, I found that the use of hydraulics is becoming more and more widespread, but also more and more people come to deal with hydraulics. For those who have not engaged in hydraulics, do not know where to start in the design of hydraulic systems, repair, and maintenance of hydraulic systems. To help to understand the hydraulic system, I have selected some commonly used hydraulic symbols, including a variety of hydraulic components, such as hydraulic pumps, hydraulic valves, hydraulic cylinders, and so on. Each symbol has its own unique shape and identification, through which the components in a hydraulic system can be accurately described and represented.
Hydraulic symbols are not drawn arbitrarily, there are certain rules, this provision is the national standard ISO 14617-1:2002, for the hydraulic technicians of various countries to provide convenient technical communication. SEE ISO standards of Hydraulic symbols.
Explain Some Of the Symbols One By One According Function
Basic Symbol
Continuous line symbol-a flow line such as a Hydraulic Pipe
Dashed line symbol-Pilot (control) line, drain line, flushing line
Frame for two and more components
Electrical control line
Hose assembly
Two fluid lines crossing (no connection)
Connection of two fluid lines
Reservoir Symbol
Drain to tank
Return to tank
Electric Motor Symbol
Electric motor–the power source of the system
Hand Pump Symbol
Hand pump
Hydraflu offers a complete range of manual hydraulic hand pumps and matched reservoirs/tanks.
Hydraulic Motor Symbol
Fixed displacement, one direction of rotation, internal case drain
Fixed displacement, bi-directional rotation
Hydraulic Pump Symbol
Fixed displacement, one direction of rotation, one direction of flow, internal case drain
Fixed displacement, bi-directional rotation
Hydraulic Cylinder Symbol
Single-acting cylinder
Double-acting cylinder (single rod)
Double-acting cylinder(double rods)
Single-acting cylinder with return Stroke through a spring
Single-acting (“plunger”) cylinder
Cylinder with adjustable cushions
Cylinder with non-adjustable cushioning
Directional Control Valve Symbol
2/2 Valve (2 ports, 2 positions)
3/2 Valve (3 ports, 2 positions)
4/2 Valve (4 ports, 2 positions)
4/3 Valve (4 ports, 2 positions)
Slip-in Valve Symbol
Pressure control normally closed, area ratio: 1
Directional control, area ratio: >0.5
Directional control, area ratio: <0.5
Accumulator Symbol
Diaphragm accumulator
Bladder accumulator
Piston accumulator
Valve Control Method
Solenoid Control
Proportional solenoid control
Lever control
Electro-hydraulic (pilot operated)
Hydraulic (Pilot operated)
Spring
Push button
Detent
Relief Valve
Direct operation
Pilot operation
Pressure Reducing Valve Symbol
Direction operation
Pilot operation
Direct operated 3-way reducing valve
Check Valve Symbol
Check valve without spring
Check valve with spring
Check valve with drain (Pilot operated)
Throttle Valve Symbol
Throttle valve with adjustable opening
Throttle valve with adjustable opening, reverse flow check valve
Pressure compensated, throttle valve with adjustable opening
Pressure compensated, three ways of throttle valve
Filter Symbol
Filter
Heat Exchanger Symbol
Heat exchange
Flow Meter Symbol
Flow Meter
Conclusion
These are some commonly used hydraulic symbols, if there is any place is inaccurate or incomplete, please call and write to contact us, we humbly accept.
