PRO-PER is the main distribütör for Donaldson Air Filtration Systems in Turkey and Bulgaria We provide full service to our clientts including all import operations, door to door delivery, keeping stocks in our Istanbul warehouse to respond to our clients' urgent requirements. In addition to providing technology driven Donaldson products, we support our clients with our experience in the energy market for after sales services. We provide solutions for air inlet modifications, suggest with expertise to better filtration solutions and performance improvement to power plant enviromental and operating conditions.