In pilot-operated valves, for example, the inflow pipe is used to transfer the tank pressure to the pilot valve so that the pilot valve is opened.
The Pressure/vacuum relief valve Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve. pilot valve Pilot valve The pilot valve is an assembly of a pilot operated valve, which is mounted on the main valve and is used to control the main valve. is then vented via the outlet pipe.
