Cadac 3kg Gas Cylinders (No. 7) are the industry standard for portable LPG (Liquid Petroleum Gas) storage in South Africa. Engineered for high-pressure durability and vertical stability, this 3kg capacity provides a strategic balance between extended fuel runtime and extreme portability for technical field work, emergency backup, and outdoor utility.
Technical Specifications
- Model: No. 7 Vertical Cylinder.
- Capacity: 3.0kg LPG (Propane/Butane mix).
- Valve Type: Standard 5/8" Right-Hand internal thread (Standard Cadac vertical valve).
- Material: Heavy-duty, high-grade welded steel.
- Coating: Anti-corrosion powder-coated finish (Signature Cadac Blue).
- Safety Certification: SABS (South African Bureau of Standards) approved.
Key Performance Features
- Vertical Vapor Space: Designed with a specific internal "ullage" (vapor space) above the liquid gas level. This ensures that only gas vapor—not liquid—reaches your Cadac Swivel Regulator or boiling table, preventing dangerous "flare-ups."
- High-Pressure Integrity: The cylinder is hydrostatically tested to withstand pressures far exceeding standard operating conditions, making it safe for transport in vehicle load bins and utility crates.
- Fingertip Control Valve: Features a high-quality brass valve with a knurled hand-wheel. For seized valves or high-torque requirements, it is fully compatible with the Cadac Control Key.
- Stability Shroud: The integrated steel "foot ring" at the base ensures the cylinder remains upright on uneven terrain, such as red-dust work sites or grassy fields, while protecting the main body from ground-level moisture and rust.
- Standardized Fitting: The internal valve thread is compatible with the full range of Cadac accessories, including lamps, cookers, and skottels, without the need for additional adapters.
Professional Safety & Usage Tips
- Transport Protocol: CRITICAL. Always transport gas cylinders in an upright position. If laid flat, liquid gas can come into contact with the valve; if the valve is opened while the cylinder is horizontal, liquid gas can escape, causing an immediate fire hazard or freezing burns.
- The "Soapy Water" Test: After connecting a Cadac Swivel Regulator, apply soapy water to the join. If bubbles form, close the valve immediately. Never use a Lighter Gas flame to check for leaks.
- Storage Environment: Store in a cool, well-ventilated area. Avoid keeping the cylinder in direct, intense sunlight for extended periods (such as a vehicle dashboard in April 2026 heat), as this increases internal pressure.
- Valve Protection: When the cylinder is not in use, ensure the valve is closed tightly. If transporting in a utility bag alongside Unitwist fittings or heavy tools, use a plastic valve plug to prevent red dust or grit from entering the brass threads.
- Refill Verification: When refilling, always check the "Tare Weight" stamped on the neck. Ensure the depot does not overfill the cylinder beyond its 3kg capacity, as this compromises the internal safety vapor space.
Common Use Cases
- Technical Maintenance: Powering gas-powered soldering irons or small torches for plumbing and electrical repairs.
- Outdoor Logistics: Providing fuel for Bugger Off Citronella Paraffin Lamps (conversion kits) or field stoves during long-range site visits.
- Emergency Backup: A reliable energy source for cooking and lighting during scheduled or unscheduled power outages.
- Agricultural Utility: Portable heat source for branding, small-scale drying, or sanitizing equipment in remote locations.
Pro Tip: For maximum efficiency during the cooler Winter 2026 mornings, keep your cylinder slightly elevated off damp concrete using a rubber mat or a wooden pallet. This prevents "base-rust" and helps maintain the gas vaporization rate. If you find the valve is difficult to turn by hand, using a Cadac Control Key provides the necessary leverage without damaging the brass spindle. Always keep a spare Bullnose Rubber Seal taped to the cylinder handle to ensure a leak-free connection every time you swap appliances.
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