Airtec Products Corp wprowadziła Novent® - specjalną blokadę przeznaczoną na zawory czynnika chłodniczego, zapobiegającą wyciekom czynnika.

Novent® locking refrigerant caps
Do zamontowania i wymaga pojedynczej śruby, na specjalny typ klucza dostępny dla licencjonowanych techników HVAC. Zakrętki występują w 3 kolorach (srebrnym, różowym i zielonym) dla rozróżnienia czynnika chłodniczego.

Refrige.com: Airtec Products Corp., a leading manufacturer and importer of HVAC/R products announced Novent tamper-resistant locking caps that aid in the prevention of refrigerant theft, leaks to the environment, and the life-threatening trend of intentional inhalation, huffing, by children and young adults from access ports on residential and light commercial air conditioning and refrigeration (AC/R) equipment.
The corrosion-resistant, aluminum-shrouded brass Novent locking caps screw onto standard Schraeder valves. They comply with the International Mechanical Code (Section 1101-10) and International Residential Code (Section M1411-6) that now mandate tamper-resistant outdoor access ports for all new AC/R installations.
The Novent patented locking caps, which can only be installed and removed with a special screwdriver or MultiKey key-ring wrench, are available only through wholesale HVAC/R distributors. The locking caps and screwdrivers are color coded green for R-22, pink for R-410A to assist in preventing accidental refrigerant mixing. A universal silver is available for use with any refrigerant.