As válvulas comumente usadas no sistema de refrigeração são: válvula globo, acelerador, válvula de segurança, válvula manômetro, válvula de retenção, indicador de nível de líquido.
Before adjusting thermostatic expansion valve, must confirm that the equipment refrigeration abnormal is caused by the thermostatic expansion valve deviation from the optimal operating point, but not because of less freon, dry filter plug, filter, fan and other reasons caused by.