Foam hydrant case,hyrant cabinet 1. simple construction,easy to operate,reliable 2.avaiable in filling stations,tunnels,etc. PY series Half-fixed (Portable) Foam-agent Fire Extinguisher It is also named as trolley type foam agent fire extinguisher. It consists of foam maker (foam gun), foam proportioner, hoses, foam liquid tank and trolley. It is mobile, flexible and easy to operate, so it has ...