A pneumatic system is a whole that uses compressed gas as its working medium. It consists of various components forming basic circuits with different functions, and these basic circuits are organically combined to transmit and control power or signals.
Pneumatic control devices occupy a very important position in the field of automation due to their numerous advantages such as simple structure, high speed and efficiency, and strong adaptability, and are widely used in various industries. Today, we'll introduce some commonly used pneumatic components.
Typical products
Basic components of a pneumatic system
Typical Suppliers
1. German FESTO
2. American Parker
3. Japan SMC
4. CKD (Japan)
5. Japanese Koganei koganei
6. Airtec Taiwan
7. Airtec Taiwan
Gas source treatment
Cylinder selection
1. To determine the cylinder diameter, three parameters need to be specified:
a. Load weight
b. Pressure used
c. Load rate
2. Determine the itinerary
Select the minimum standard travel distance that exceeds the working distance.
3. Determine the cylinder series
4. Determine the cylinder installation method
Directional control valve
Definition: A control valve that can change the direction of gas flow or turn the gas on or off.
Control valve classification
1. Classified by control method:
Electromagnetic control valves, pneumatic control valves, manually controlled valves, and mechanical control valves;
2. Classified by mode of action:
Direct-acting, pilot-operated;
3. Classified by port/number of digits:
2-way valve, 3-way valve, 4-way valve, 5-way valve, 2-position, 3-position.
Internal structure of control valve
Electromagnetic principles
pneumatic control valve
Manual control valve
Mechanical control valve structure
Directional valve -2-way
3-way valve structure
5-way valve
2-position 2-way valve
2-position 3-way valve
2-position 4-way valve
2-position 5-way valve
Direct-acting solenoid valve
pilot-operated solenoid valve
Sealed form
rubber seal
Metal seal
One-way valve structure - symbol
shuttle valve structure - symbol
quick exhaust valve
Sensors
Basic circuit of sensor
Valve flow calculation:
Effective cross-sectional area = 18 * CV
Flow = 1000 * CV
Cylinder air consumption
q = 0.0462D*DU(p + 0.102)
q: Cylinder air consumption
D: Cylinder bore
U: The maximum movement of the cylinder is generally 350 mm/s
p: Pressure
