Quality standards for carbonated beverage fountain drinks continue to increase with greater focus on beverage grade CO2 and the storage system equipment. Additionally, there is stricter enforcement on correctly installed vent and fill hose connections, including compatible material specifications for temperature and pressure. Regulations covering the installation on beverage bulk CO2 tanks may vary by location and installers should understand the local requirements and ensure all permitting, registration, and installation regulations to be followed.
To support these updates, Chart has introduced new beverage CO2 fill and vent hoses that follow industry standards for beverage quality and material specifications. Liquid CO2 transfer hoses are a part of the overall beverage system that must be compatible for use with CO2 and should be made of components that will not affect the quality of the fountain drink. The new Chart fill hose kits, which connect the Carbo Series bulk beverage CO2 tanks to the remote fill box are plasticizer free, have a minimum burst pressure of four times the working pressure, and have been tested for exposure to -109°F. The flexible vent hose, used to connect the bulk tank pressure relief system to the remote fill box, is also rated for exposure to -109°F, and has a burst pressure offour times the working pressure of the tank.
Chart is also introducing a newly designed Fill Box for the Bulk Beverage CO2 System. The stainless steel fill box is a major component of a stationary bulk CO2 fill and vent circuit when the tank is installed indoors. It includes the liquid CO2 fill connection and vent line discharge fitting, which safely vents excess CO2 gas outdoors. It is important that the vent line have a secure connection to the discharge fitting in the fill box, so CO2 gas cannot leak from the system during normal venting. It is also an important benefit to have the fill box vent line connection visible for inspection from inside the fill box. This will ensure the vent line is fastened securely and has not pulled loose into the wall.
The Chart fill box design has changed to accommodate bulkhead style compression fittings so that the new vent hose can be securely connected. The bulkhead fitting allows the vent line to pass through the fill box back wall and connect to the elbow discharge fitting inside the fill box. This allows the termination end of the vent line to be visible for inspection when the fill box door is open. The double compression connections on the bulkhead fitting provide positive verification that the vent line is securely fastened to the fill box vent line discharge. The new vent line must use compression fittings and should not be used with barb style fittings. The fill box depth dimension has changed to 3" deep to accommodate these new bulkhead compression fittings. The liquid CO2 fill connection has not changed on the new design fill box and it will accommodate all fill lines that have the 45° flare fittings. All fittings and connections on the bulk beverage CO2 systems installed inside or in enclosed spaces should be leak checked when first filled and periodically to ensure there are no leaks. CO2 monitors with alarms should also be installed when bulk CO2 tanks are used indoors, or in enclosed spaces. Check local regulations for requirements and installation guidelines on CO2 monitors.
For additional information on the new fill box, fill hose and vent hose, see Chart technical bulletins TSB 1005 and TSB 1006.
Article written by Bob Brantley, Product Manager for Bulk CO2 Systems at Chart Industries and published in the May 2016 issue of CryoGas International.