Descripton: 

This model is featured with simple structure,well-sealing and durability. It can withstand bad environment, for example in dust or in the sandy, and is easy to uninstall and clean. The key of the product is to make the couplings for oxygen and for acetylen e into two specifications, which are not interchangeable, so that to divide the path of two kinds of gases and ensure the safety. The design is typically useful to shipping manufacturing, gas sealing in repairing services, etc.