Female thread couplings CFT

Contracor Blastlock : The new generation of high-performance couplings

The Contracor Blastlock system was developed for users who refuse to compromise on material quality and process reliability. In the harsh environment of surface finishing, the coupling is the heart of compressed air transmission - Blastlock ensures that this heart remains indestructible.

Materials science in the service of productivity

Unlike heavy and corrosion-prone metal couplings, the Blastlock system consists of a specialized, extremely glass fiber reinforced nylon .

• The memory effect : This material offers unique elasticity. While conventional clutches permanently deform and become unusable under mechanical stress (e.g., being run over or falling), nylon returns to its original shape thanks to the memory effect .
• Ergonomics & Handling : The drastically reduced weight conserves the operator's energy and enables fatigue-free work, even during long shifts or in difficult spatial conditions.

The physics of the perfect connection

Thanks to innovative design features, Blastlock offers technical advantages that translate directly into higher blast performance:

• The pressure-fit effect : The system utilizes the internal operating pressure. As soon as air flows through the hose, it presses against the inner wall of the coupling. The higher the pressure (up to 12 bar ), the more secure and tighter the connection becomes.
• The flush fit principle : In the Blastlock coupling, the hose end and NBR seal form a perfectly flush unit. This flush fit prevents dangerous turbulence of the blasting media, which often leads to internal erosion and premature failure in standard couplings.

Safety as a system: Contracor Safety Cables

A professional blasting setup is only complete when physical risks are minimized. Contracor Safety Cables (whip fuses) are the vital backup for every Blastlock connection.

Maximum protection in every situation

• Protection against the whiplash effect : Should a coupling be mechanically damaged or become detached under extreme pressure, the safety cable immediately absorbs the kinetic energy. This prevents the hose from whipping around uncontrollably , thus protecting personnel from life-threatening injuries.
• Structural relief : Especially in vertical applications - for example on bridge piers or facades - an enormous weight rests on the coupling. The Safety Cables actively support this weight and prevent the tensile load from tearing the Blastlock coupling's screw connections out of the hose sheath.
• Heavy-duty design : Made from galvanized, highly flexible steel braid, these cables are designed for the toughest conditions. The spring-loaded loops allow for tool-free installation in seconds.

User guide: How to ensure your success

To ensure the full performance and safety of the Contracor Blastlock system, please follow these professional steps:

1. 1. Precision in the cut : A clean, right-angled cut of the jet hose is a prerequisite for the flush fit and a turbulence-free flow.
2. 2. Assembly until the stop : Push the hose firmly into the coupling until it reaches the inner stop.
3. 3. Screw connection : Secure the coupling with the provided screws, without damaging the hose liner.
4. 4. Final securing : After coupling, always insert the original locking pins into the designated holes in the claws. This prevents the connection from accidentally unscrewing.
5. 5. Cable installation : Position the safety cable so that, when connected, it has sufficient tension to engage without delay in an emergency.

With Contracor Blastlock, you are relying on a system that impresses with its material physics and protects with well-thought-out safety concepts.