What is the pressure and vacuum setting of pv valve on oil tanker?

The pressure and vacuum setting of a PV (Pressure-Vacuum) valve on an oil tanker typically ranges from 0.5 to 1.0 psi for pressure setting and -0.125 to -0.5 psi for vacuum setting. These settings are designed to protect the cargo tanks from overpressure and excessive vacuum during loading, discharging, and temperature changes. The exact specifications may vary based on the design of the tanker and regulatory requirements. Regular maintenance and checks are essential to ensure the PV valves function correctly.