The blower is roots blower, a rotary lobe air blower. It can be tri rotary lobe blowers (3 lobes blowers), or twin lobe blowers. The roots blowers, mainly made in cast iron material, which widely used as wastewater treatment as blowers, STP air blowers, ETP air blowers, pneumatic conveying air blowers, FGD oxidation blowers, aquaculture fish farming shrimp farming air blowers etc. It can be used as pressure blower or vacuum blower.
The blower can be made in stainless steel or cast iron with special coating, applied for special gas or water vapour, like biogas blower, water vapor steam blower or call steam compressor etc.