Abstract: A gas recycling system for use with a gas compressor having an inlet for gas at a relatively low pressure and an outlet for gas at a relatively high pressure, a gas-lubricated, non-contacting, double mechanical seal to which relatively high pressure gas may be fed from the compressor, the gas recycling system including a seal gas booster for boosting the pressure of the gas between the compressor and the double mechanical seal.

Abstract: A gas recycling system, for use with a gas compressor having an inlet for gas at a relatively low pressure and an outlet for gas at a relatively high pressure, a gas-lubricated, non-contacting mechanical seal to which relatively high pressure may be fed from the gas compressor, the system including both a seal gas booster and a vent recycle system, the system further including means for feeding seal gas from the gas compressor to a conditioning system and from the conditioning system to the mechanical seal and an activation device to activate the gas booster once the gas difference exceeds a pre-determined level.