Vacuum-operated gas feed system consists of direct cylinder mounted vacuum regulators with an automatic vacuum switchover and an ejector. Addition of an automatic gas control valve is as simple as cutting the vacuum line, connecting the line from the vacuum regulator to the valve inlet and the line to the ejector to the valve outlet. All that remains is to connect power and the flow signal.
Vacuum packers for home, use vacuum seal foods in flexible plastic bags or tempered glass jars. All are countertop appliances that are convenient to operate both with bags and jars. Bags are ideal for dry products that will not crush or puncture the bag. Any removal of air will be beneficial in the storage time of dried foods, but the better the vacuum, the better the keeping quality.