Metal powder coating , to . This compressed air condensate automatic drainer is a mechanical automatic drainer which has casting aluminum alloy shell and inside float ball drainage system.Drainer outlet is closed when drainage buoyancy is smaller than floating ball weight plus compressed air pressure; and it open when buoyancy increases, in order to drain condensed liquid. This compressed air condensate automatic drainer is significantly different from traditional mechanical automatic drainer, which is belong to continuous drops drain. Automatic drainer is extremely reliable in operation, no electricity needed, no noise, no loss of compressed air. Drainer has big drainage outlet that is not easily blocked; it is a and great choice of compressed air equipment drainer., Weight: 1.12986909275 pounds, Manufacturer: Jaywool