A number of food grade greases are also aluminum complex greases. Especially used in higher heat environments.
I would do a quick lubricant survey on this equipment.
1. Since we’re talking food grade - is it an H1 or H3 application? If so, keep that in mind when selecting a product. Since you’re talking about a zerk fitting, I’m guessing H1. But, that is up to you to determine.
2. What product was in it last?
3. What temperature range do you need for the grease?
4. What is your maintenance schedule?
Lubriplate offers several food grade grease options. Clarion also offers good options.
My go to recommendation for this application would be:
Clarion Food Machinery HT EP 2. Aluminum complex grease:
Product data sheet:
http://docs.clarionlubricants.com/msds_pi/CL10103.pdf
Or Lubriplate FGL-2
Both products have a #1 as well, If the speed is higher, or the machine dictates it for whatever reason.
If you’re looking specifically for a synthetic, lubriplate also has synthetic options, with the SFL line:
If the machines are of European manufacturers, or you’re looking for something very high heat resistant, you could look into Klueber Barrierta L 55/2. This is a more specialized PFPE based grease.
However, I would check the above. Make sure this is not an H3 application first off. Then what product was previously in it. What the machine recommends grease wise - #1 vs #2, temp range, etc. then decide on your maintenance schedule.
Clarion and Lubriplate also offer ISO100 greases. Lubriplate has a line of calcium greases, that are H1 as well.
That will help narrow your greases down. Food grade does get a bit complicated.