In the absence of electrical supply, manually operated valves such as Hand Lever Valves are used. The functioning is the same; however, the solenoid coil is replaced by a hand lever, which controls the movement of the spool inside the valve, thereby allowing the air to pass.
Each pneumatic system has an optimal operating pressure and exceeding this pressure results in excessive wear and wastes compressed air. Regulators are designed to maintain a consistent prescribed outlet pressure regardless of the inlet pressure and also maintain a consistent pressure regardless of flow rate requirements. The precision needed to maintain the regulation and flow requirements determines the type and cost of regulators needed.
Pneumatic cylinder (sometimes known as air cylinders) is switch use the power of compressed gas to produce a force in a reciprocating linear motion.Like hydraulic cylinders, something forces a piston to move in the desired direction. The piston is a disc or cylinder, and the piston rod transfers the force it develops to the object to be moved. Engineers sometimes prefer to use pneumatics because they are quieter, cleaner, and do not require large amounts of space for fluid storage.Very compact design easy to use large companying force, easy in maintained.