Pneumatics (from Greek πνεῦμα pneuma "wind, breath") is the branch of engineering that uses gas or compressed air.Pneumatic systems used in industry are usually powered by compressed air or compressed inert gas. A centrally located electric compressor powers cylinders, air motors, pneumatic actuator

Heating, ventilation, and air conditioning (HVAC)[1] is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engi

An O-ring, also known as a packing or toric joint, is a mechanical gasket in the shape of a torus; it is an elastomeric ring of circular cross-section designed to Compressed during assembly between the parts, forming a seal at the interface.O-rings can be used in static applications or dynamic appli