Grundfos GSPA-S ASME Vortex type Air Separators eliminate air quickly and efficiently from open and closed loop heating/cooling systems. Water enters and exits through unique “tangential” connections, which promote a low velocity swirling effect in the center of the unit. Natural centrifugal forces allow the heavier airfree water to move toward the outer edges while entrained air is captured within the “eye” of the vortex and released out of the top of the separator. The bubblefree water then exits near the bottom of the unit, protecting the systems against the noise, corrosion, and damage commonly caused by entrained air. GSPA-S units also include system strainer.