DKCB air-pumped long tube respirators are respiratory protective equipment manufactured by COLTRIS, Italy, in accordance with ISO 3746 international standards.

The DKCB air-pumped long tube respirator is supplied by a special respiratory pump, which is delivered to the respiratory mask through special tubing, quick couplings and demand valves to provide the user with clean gas to breathe, constituting a respiratory protection system that is completely isolated from the external environment. The respirator system comes standard with a 2-person configuration, and can be used by 1-6 people at the same time with a quick-connect element and tubing. It is widely used in metallurgy, petroleum, chemical industry and other fields.