Parker Velcon Aviation Jet Fuel and Diesel Fuel Filtration For military fuel handling and filtration, Parker AFD has developed & supplied coalescers & separator cartridges for vessels qualified to stringent military fuel filtration specifications, specifically EI1581 and qualification procedures for aviation jet fuel filter/separators, Category M and M100.[PDF] Products for Aviation Fuel Handling - Parker Hannifin HA Horizontal Vessels VA Vertical Vessels CDF® Fuel Monitor Absorb water and filter particulate from Avgas and Jet Fuel. Provide protection against water slug transmission. Aquacon® Filter particulate matter and absorb water with great efficiency. Water capacity is approximately 40 times greater than 2” diameter monitor cartridges.