One method of extending the operating range for liquid ring vacuum pump (LRVP) systems is through the usage of vacuum jet ejectors, either a Steam Jet or and Air Jet. Both jets are capable of handling upsets (liquid carry-over) without damage resulting in minimal effects on operations.
Steam Jet/ LRVP Hybrid
Hybrid steam jet/ liquid ring vacuum systems combine steam jets, or multiple jets, backed by condenser and liquid ring vacuum system. The jets utilize steam as the motive fluid which allows for fairly high single-stage compression ratios. Hybrid steam jet systems are capable of operation at 0.1 mmHgA and less.
Thus, Steam jet systems are best used in applications where steam is already available and the end-user is not concerned with adding water to the vapor stream.