Fluid Handling Dynamics LTD is a Factory Authorized Distributor, Service and Warranty Center for ARO® | Ingersoll-Rand Fluid Products. FHD Specializes in ARO®Air Diaphragm Pumps , ARO®Piston Pump, ARO®Fluid Regulators and ARO® Parts and Service. Buy ARO® Products online or Contact us @ 419-633-0560 for ARO® Support.