GWTT manufactures Soil Vapor Extraction systems. Although each system is manufactured to meet your specific requirements, most are very similar to each other and hence, all components are almost always in stock. There are a number of blower types that can be used; the choice ultimately depending on air flow rate, vacuum, pressure and possibly other design considerations. The most commonly used blowers for our soil vapor extraction systems are regenerative, positive displacement and rotary claw. Re-generative blowers are typically chosen for low to moderate flow rates and low to moderate vacuum/pressure requirements. Conversely, positive displacement and rotary claw blowers are more commonly used for higher flow and higher vacuum/pressure applications.