The energy efficient compressed air filters. Delivered Air quality in accordance with ISO 8573-1:2001, the international standard for compressed air quality. Filtration performance independently verified by Lloyds Register. Coalescing and dust removal filters are covered by one year compressed air quality guarantee which is automatically renewed with annual maintenance - filter housings are Alocrom treatment by a 10 year housing guarantee. die-cast filters optimised flow path from patented Aerospace Flow Management System