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CIM
Few things to remember
Question | Answer |
---|---|
Force = | F=PA |
Newtons 2nd law of motion | Force Mass * Accelaration F=ma downward force acting on an object= mass & Gravity W = mg (Gravity = 9.81 M/S^2) |
Boyel's law | At constant temparature the products of pressure & volume is constant for a given mass of gas, this is mathematically writen as p1v1= p2v2= p3v3= constant |
1 bar pressure equal to | 10 N/cm^2, 14.5 psi, 100,000 pascal (N/M^2) |
flow rate equation | Airflow rate Q depends on the number of extend retract cycles of the cylinder per minute Q = V* Cycle/Min usually this is expressed in terms of the air consumption at atmospheric pressure or free air delivered (FAD) |
What is FAD | FAD = Q * Compression ratio (eg. 5 bar pressure to atmosphere = 5 + 1) |
Structure of Pneumatic systems | Energy Supply >>>>>Inputs (sensors)>>>>>>Processing>>>>>>>Controls>>>>>>Actuators |
Air Service unit | Air filter, Pressures regulating valve, pressure gauge & Lubricator |
labelling of valve ports | 1-P (pressure port) 2,4 or A,B working lines 3,5 or R,S exhaust ports |
Pilot valve labelling | open 1 to 2 (12) (Y, 5/2) (Z, 3/2) open 1 to 4 (14) (Z, 5/2) open 1 to 2 (10) (Z, 3,2) |