... : AIRTAC electromagnetism valve, anti-corrosive pipe 3 moving nozzle system: air cylinder driven, spray speed and spray width can be adjusted by ... With foam function, inner foam pump, it dont need outer air supply, it is convenient to spray flux.1 preheating temperature ... . 2 protect short circuit: with short circuit protection, with Sanling air switch protection in main power and tin pot of preheating ...