The carrying system has been orthopaedically designed and follows the contours of the back, ensuring the weight of the breathing apparatus set is concentrated on the hips and therefore reducing the risk of backstrain and fatigue. The backplate is constructed using a strong, moulded, composite polyamide material with carbon fibre and is anti-static, chemical and impact resistant. The harness is made from flame retardant polyester webbing, with centre adjustable buckle and independent shoulder straps. Moulded handles on the backplate provide greater manageability when transporting the set.
The Dräger positive pressure Lung Demand Valve is of a balanced piston design and is first breath activated. This provides a stable air supply with low breathing resistance and is extremely quite in use. It has a wrap around silicone cover for added impact protection and is easy to service, clean and disinfect. The Lung Demand Valve also features a centrally positioned, easily located, positive pressure ‘switch off’ push button.
The carrying system incorporates an adjustable cylinder strap, which can accommodate cylinders of all sizes from 4 litres up to 12 litres in capacity. The strong polyester strap can also accommodate a twin pack cylinder arrangement as an option. There are no special tools or procedures required for adjustment, which uses a secure, proven cam-lock mechanism.
The high performance balanced first stage reducer can be used with 200 or 300 bar cylinders and provides excellent flow characteristics using a small, lightweight reducer body. It incorporates a unique, patented safety pressure relief valve and allows for the easy connection of accessories. Servicing is made easier due to simple plug-in connections.
The PA91 Plus comes complete with Dräger’s unique medium pressure operated warning whistle, which provides a low pressure warning in excess of 90 dBa and is consistent down to 10 bar. There is a fully luminescent gauge and the whistle warning unit assembly is fully integrated into the gauge / hose.
The PA91 Plus can be used with any Dräger full facemask and incorporates Dräger’s latest Plus Lung Demand Valve.