Control Valve Air Lock Relay Working Principle
Air Lock Relay is designed such that when the header / supply air pressure falls below the desired set value (cut-off value) the Air Lock traps the air pressure in...
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Relay Principle & its Types
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are...