... chemical, to fill such as mousse, air purifying agent, pesticide, disinfector, fire extinguishing agent, carburetor cleanser and PU foam filler etc ... of certain viscosity ad concentration (e.g., polyurethane forming agent).It has a good self-sucking capability.The second ... , freon , dimethyl ether , carbon dioxide, nitrogen, oxygen , compressed air and 134a,etc .The main seals are made of imputed ...