Breathing Apparatus Backplate and Harness in Pakistan. Breathing Apparatus Backplate and Harness systems are critical load-bearing components used in SCBA (Self-Contained Breathing Apparatus) and Scuba Diving Equipment. They securely support the air cylinder and distribute weight evenly across the wearer’s body, ensuring stability, comfort, and operational safety in hazardous environments.
International breathing air safety standards are guided by the National Fire Protection Association (NFPA) and the International Organization for Standardization (ISO), while compliance in Pakistan aligns with the Pakistan Standards and Quality Control Authority (PSQCA).
🔎 What is a Breathing Apparatus Backplate and Harness?
A Backplate and Harness System is a structural mounting assembly that:
- Holds the breathing air cylinder firmly in place
- Distributes weight evenly across shoulders and waist
- Secures regulator hoses and accessories
- Provides ergonomic comfort during long-duration use
- Maintains cylinder alignment for safe breathing
It is commonly used in:
- SCBA systems
- Airline Breathing Apparatus (ABA)
- Scuba diving sets
- Emergency escape breathing systems
- Industrial confined space equipment
⚙ Working Principle of Backplate and Harness System
1️⃣ The air cylinder is mounted on the backplate
2️⃣ Cylinder straps secure it tightly
3️⃣ Shoulder harness and waist belt distribute weight
4️⃣ Quick-release buckles allow emergency removal
5️⃣ System stabilizes breathing apparatus during movement
The design ensures load balance, mobility, and safety, especially in firefighting, offshore, and underwater operations.
🧰 Types of Backplate and Harness Systems
Demand Valve
Demand valves are widely used in:
- Airline Breathing Apparatus (ABA)
- SCBA (Self-Contained Breathing Apparatus)
- Scuba diving regulators
- Emergency escape systems
- Industrial breathing systems
1️⃣ Aluminum Backplate System
- Lightweight and corrosion-resistant
- Used in warm water scuba diving
- Suitable for recreational divers
2️⃣ Stainless Steel Backplate
- Heavier for better underwater trim
- Ideal for technical diving
- Highly durable in marine environments
3️⃣ Composite / Polymer Backplate (SCBA)
- Flame-resistant material
- Designed for firefighting operations
- Meets NFPA safety standards
4️⃣ Adjustable Harness System
- Quick-adjust straps
- Padded shoulder support
- Integrated waist and chest straps
- Used in industrial SCBA
🌊 Use in SCBA & Diving Equipment
✅ SCBA Systems
Used by firefighters and rescue teams.
The backplate supports 6.8L to 9L cylinders (200–300 bar).
Provides 30–60 minutes of breathing air depending on cylinder size.
✅ Airline Breathing Apparatus
Backplate stabilizes the wearer while connected via hose to compressor or cascade system.
Used in oil refineries, tank cleaning, and confined spaces.
✅ Scuba Diving Equipment
In scuba systems, the backplate connects with:
- Buoyancy Control Device (BCD)
- First stage regulator
- Second stage regulator
- Submersible Pressure Gauge (SPG)
- Octopus regulator
- Dive computer
- Weight system
It improves underwater trim, balance, and streamlining.
⚙ Main Components of Backplate & Harness
- Backplate (steel, aluminum, or composite)
- Shoulder harness straps
- Waist belt with buckle
- Chest strap
- Cylinder cam bands
- D-rings for accessories
- Padding (in comfort models)
- Quick-release system
- Tank support bracket
Each component enhances stability, durability, and wearer comfort.
🏭 Applications in Pakistan
Backplate and harness systems are widely used in:
- Oil & gas refineries
- Offshore drilling platforms
- Shipyards and ports
- Fire departments
- Industrial confined spaces
- Commercial diving operations
Demand is highest in Karachi, Port Qasim, and other major industrial zones.
💰 Backplate and Harness Price in Pakistan
| Type | Estimated Price Range (PKR) |
|---|---|
| Aluminum Scuba Backplate | 18,000 – 45,000 |
| Stainless Steel Backplate | 30,000 – 75,000 |
| Complete Scuba Harness System | 35,000 – 120,000 |
| SCBA Backplate Assembly | 85,000 – 250,000 |
Prices depend on brand, material, load capacity, corrosion resistance, and certification standards.
🧪 Maintenance & Safety Guidelines
For safe and long-term use:
- Inspect straps and stitching regularly
- Check buckles and D-rings for corrosion
- Ensure cylinder cam bands are tight
- Rinse with fresh water after marine use
- Store in dry, ventilated area
- Replace worn webbing immediately
- Annual inspection recommended for SCBA units
A damaged harness system may cause cylinder instability, reduced mobility, or serious safety risks.
Breathing Apparatus Backplate and Harness system is a vital structural component in SCBA and scuba diving equipment. It ensures proper weight distribution, secure cylinder mounting, and operational stability in industrial, marine, and emergency rescue environments across Pakistan.
Whether used in firefighting operations, offshore platforms, or commercial diving, a high-quality backplate and harness system enhances both safety and performance in demanding conditions.