Preview: https://soundcloud.com/ambientpictures/air-pressureblow-sfx-pack-marketplace

Pneumatic systems air pressure release sounds which can be used as a part of sci-fi sliding doors, vecicle doors, steam-punk machines, etc., and also some continuously air blowing sounds from subtle and static - for gas torch for example, and intermittent with some fluctuations and more pressure - for air bleeds through damaged space suit perhaps. 

Any sounds which need to loop are looping seamlessly.