Single Acting Cylinder Flashcards
(12 cards)
What is a Single Acting Cylinder (SAC)?
A pneumatic cylinder that uses compressed air to move in one direction and a spring to return.
How do you identify an SAC by its physical appearance?
It has one air port and a visible spring return on one end.
What is the circuit symbol for a Single Acting Cylinder?
A rectangle with a rod extending from one side and a single air connection.
What happens during the outstroke of an SAC?
Compressed air enters the cylinder, forcing the piston rod out.
What happens during the instroke of an SAC?
Air is released and the internal spring pushes the piston rod back in.
How many SACs are typically used in a basic pneumatic system for GCSE-level circuits?
Up to two SACs in any one system.
Give an example application of an SAC.
An automatic stamping machine or small clamping mechanism.
What is meant by ‘instroke’ in a cylinder?
The movement of the piston rod back into the cylinder body.
What is meant by ‘outstroke’ in a cylinder?
The movement of the piston rod out of the cylinder body.
How do you analyse a circuit diagram containing SACs?
Identify each SAC by its symbol, trace the air paths, and determine the sequence of instroke and outstroke actions.
What does a push-button valve do in an SAC circuit?
It acts as the input, controlling when compressed air is sent to the cylinder.
What’s a safety consideration when using SACs?
Ensure hands and clothing are clear of moving parts during operation.
