Like the newer Pop-up valve, the 4-inch pop-up valve with internal sleeve pressurizes your blast pot. This older style valve can be found on blast machine models manufactured before June 1983.
The CPF Air Filter Cartridge can be used in both the CPF 20 and CPF 80 air filters. This is a multi-stage filtration cartridge to improve the “taste” of your breathing air when using an HP respirator system.