SIGMA 2 TYPE 2 SELF CONTAINED BREATHING APPARATUS
The Scott Safety Sigma 2 Type 2 is an open circuit, selfcontained, compressed air breathing apparatus.
The Sigma 2 Type 2 consists of a backplate, carrying harness and pneumatic system, containing a reducer with integrated cylinder connector, pressure gauge, whistle and demand valve.
The Sigma 2 Type 2 can be configured in a number of different ways with various sized single cylinders and the choice of face masks including the Vision 3 or Promask PP full face mask.
TECHNICAL SPECIFICATIONS
| OUTLET PRESSURE | |
|---|---|
| 200 bar inlet | 5.5 to 9.5 bar |
| 300 bar inlet | 6.0 to 11.0 bar |
| Pressure relief valve protected | Approx. 13.5 bar |
| Flow restrictor to gauge supply hose | <25 litres minute |
| PRESSURE INDICATOR & WARNING WHISTLE | |
|---|---|
| Bourdon tube type dial indicator | - |
| Heat and impact resistant Polycarbonate Lens | - |
| Safety blow out vent in rear of gauge | - |
| Accuracy | +/- 10 bar between 40-300 bar |
| SCBA WEIGHT | |
|---|---|
| Single configuration (less cylinder) | 2.3 kg |
| Single configuration with face mask (less cylinder) | 3.0 kg |
| Length | 600 mm |
| Width | 278 mm |
| Depth (with 6.8 litre 200 bar cylinder) | 200 mm |
| STAINLESS STEEL SWIVEL HOSE FITTINGS | |
|---|---|
| Medium Pressure Hose | |
| Maximum working pressure | 16 bar |
| Minimum burst pressure | 80 bar |
| High Pressure Hose | |
| Maximum working pressure | 450 bar |
| Minimum burst pressure | 800 bar |
APPROVAL INFORMATION
The Sigma 2 Type 2 by Scott Safety is certified to EN137:2006 Type 2 / MED / AS/NZS 1716:2012.
APPLICATIONS
The Sigma 2 Type 2 is specifically designed as a Marine/Industrial Fire Fighting SCBA, but is also suitable for providing respiratory protection in any IDLH environment.
COMPONENTS & MATERIALS
| COMPONENT | MATERIAL |
|---|---|
| Pressure Reducing Valve | Nickel Plated Brass |
| Reducing Valve Seat | Polyamide (Nylon) |
| O-Rings | Nitrile, Silicone, EPDM |
| Backplate | Glass & Carbon filled Nylon composite |
| Harness | Flame retardant kevlar band |
| Cylinder | Steel or Composite |
TEMPEST DEMAND VALVE
Compact positive pressure demand valve featuring servo-assisted, tilting diaphragm mechanism with low inspiratory resistance and responsive dynamic performance, automatic first breath activation and hands free bypass facility. Components are injection moulded from Polyamide with rubber seals and diaphragms.
TEMPEST DEMAND VALVE SPECIFICATIONS
| FEATURE | SPECIFICATION |
|---|---|
| Pressure Reducing Valve | -20 to -30 mbar |
| Air Flow | >1000 litres/minute |
| Nominal Flow | 150 litres/minute |
REDUCING VALVE
First stage pressure reducing valve featuring non-adjustable, spring loaded piston mechanism and outlet supply protected by pressure relief valve. Valve body and cap machined from nickel-plated brass with stainless steel spring and hose retainer U-clips.