closed drain means the system is sealed and can be exposed to pressures up to the highest pressure that the drain is connected to. The fluids flow because of a higher pressure of the inlet than that of the outlet.
An open drain is always open to the atmosphere and the highest pressure would be the height of a coulum of a fluid abve the exit. This system flows be gravity or sloping of the lines.
Open / Close Drain Vessel
Re: Open / Close Drain Vessel
