Details

---

Details

Highlights

• Durable and reliable Tempest positive-pressure demand valve with hands-free bypass and automatic first-breath activation

• Airline-compatible version (AC) allows for connection to remote air supply systems, enabling extended operations

•  

  • Split Demand Valve Coupling (SDC) provides safe and efficient cylinder switching or dual-user rescue configurations

  • Robust and lightweight backplate with anti-static, chemical-resistant composite design

  • Kevlar® blend harness and Proban® padding for flame resistance, comfort, and easy cleaning

  • Stainless steel swivel hose connections and high-burst pressure-rated hoses for long-term safety

  • Compatible with 4.7L to 9L, 200 or 300 bar Scott cylinders

  • No face mask included in this variant—ideal for modular setups or replacements

  • Commonly used in firefighting, marine rescue, chemical handling, and confined space applications

The 3M™ Scott™ ProPak Sigma SCBA with Split Demand Valve Coupling (SDC) and Airline Coupling (AC) is a Type 2 open-circuit self-contained breathing apparatus (SCBA) designed to meet the demanding needs of firefighting, rescue, and marine operations. The unit features a Tempest demand valve, Kevlar® harness, lightweight backplate, and airline connection capability. This configuration (Part Code: PROPAK-SIGMA-SDC-AC, Article: 2027155) is supplied without a facemask, allowing flexibility for users who already have compatible masks. Its tough build and safety features make it ideal for IDLH environments.

Typical Properties

Property	Value
Brands	3M™ Scott™
Harness Material	Kevlar® blend with Proban® padding
Demand Valve Type	Tempest (positive-pressure, first-breath, hands-free bypass)
Airline Compatibility	Yes (Airline Coupling - AC)
Cylinder Compatibility	4.7L–9L, 200 or 300 bar Scott cylinders
Supplied Mask	Not included
Weight (approx.)	~2.6 kg (apparatus only, excluding mask and cylinder)
Application	Firefighting, marine, chemical, rescue, confined spaces