Operation of the Combination Pressure-Demand Breathing Apparatus is manual. It is an approved, rated five-minute escape device. The pressure demand air-line respirator phase is connected by an approved air-supply hose to a primary respirable air source; the worker breathes from this source with the valve of the egress (exit) cylinder of the device turned off until the user is ready to leave the working area. The user can leave, connected to the primary air source, or can open the egress cylinder valve and have approximately five minutes'; respiratory protection. When breathing from the air cylinder, the user can remain connected to the primary air supply and exit, or can disconnect from the air source for easier escape. If the primary air supply source should fail for any reason, the worker can switch to the egress cylinder by turning a valve and escape to a safe atmosphere.

The Combination Pressure-Demand Breathing Apparatus is approved by the National Institute for Occupational Safety and Health (NIOSH) Approval TC-13F-143-when the device is supplied with respirable air from either the small escape cylinder or from a primary compressed-air source; the approval requires that when connected to a primary air source, an air inlet pressure between 65 and 85 psig must be maintained through an approved hose length of between 8 and 300 feet. The approval requires that the compressed-air cylinder be fully charged with air conforming to at least Grade D of Compressed Gas Association Commodity Specification for Air, G-7-1; use limited to temperatures above -25 degrees F.

Asbestos Abatement
Chemical
Construction
Hazardous Materials
Nuclear
Oil and Gas
Welding

Confined Space
Oxygen Deficiency
Toxic Atmosphere IDLH
Welding

Product Information

Provides respiratory protection for personnel who must work in atmospheres that are immediately dangerous to life and health (IDLH), such as in oil drilling and the manufacturing and handling of certain chemicals. Serves as both a long-duration work device and an escape device. Approved for respiratory protection for entry into, for extended periods of work in and for escape from IDLH atmospheres. If used for entry into IDLH atmospheres, the air-line must be connected before entry. The self-contained air supply is approved for escape only. The apparatus features a lightweight shoulder harness, which is foam-padded for extra comfort and a waist belt with a seat-belt-type buckle. The handwheel of the cylinder valve is easy to grasp and operate. A short length of neoprene hose makes it easy to connect and disconnect the air-supply hose. The inlet is equipped with a Snap-Tite, Foster, Hansen or Duff-Norton quick-disconnect fitting.

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