Rectus pneumatic quick couplings are divided into types based on profile (international, European, French), construction (single- and double-shut-off, free flow), and purpose (standard, for injection molds, for breathing systems, coded). They are used for quick and safe connection and disconnection of pneumatic hoses in various branches of industry, ensuring the flow of compressed air.
Types of Rectus Quick Couplings
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- International: Profile 6/9/13, often used in injection molds.
- European: Standard European type 26.
- Others, e.g. French
- By construction (valve type):
- Single shut-off: The socket has a shut-off valve, the plug is without a valve (free flow).
- Double shut-off: Both the socket and the plug have shut-off valves, preventing leaks after disconnection.
- Free flow: Both the socket and the plug do not have shut-off valves.
- By special features:
- Color or shape coded: Facilitate the distinction of connections.
- SAFE-LOCK™: Version with a mechanism preventing accidental disconnection.
- By material:
- Brass: Standard, durable solution.
- Stainless steel (AISI 303, AISI 316L): Designed for use in aggressive environments, e.g. for liquids or gases, providing data on temperature and working pressure.
- Plastic: Lighter and often cheaper solution.
- Quick coupling type 21KB (DN 5mm) - Rectus
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Purpose of Rectus Quick Couplings
- Working with pneumatic tools: Standard quick couplings for connecting tools to the compressed air network.
- Other applications:
- Hydraulic systems.
- Installations for heating oil.
- Connections for liquids and gases.
Rectus Quick Couplings Series 02
Rectus series 02 quick couplings are the smallest available, characterized by high working pressure (up to 35 bar), temperature range from -20 to +100 degrees C, easy connection (one-handed in some models), low pressure drop, and the possibility of use for various media such as compressed air, inert gases, or water. Many of them have shut-off valves that prevent leaks, and stainless steel models are corrosion-resistant.
Key features:
- Working pressure and temperature: Maximum working pressure up to 35 bar (with a safety factor of 4:1), and working temperature ranging from -20 to +100 degrees C (for NBR seals).
- Medium: Suitable for compressed air, other inert gases, and water.
- Mechanism: They have shut-off valves (double or single) preventing leaks during disconnection. Stainless steel models use a ball system that ensures high operational quality.
- Connection: Many models can be connected with one hand, making operation easier.
- Flow: They offer a large flow rate, e.g. 300 l/min for compressed air at an inlet pressure of 6 bar and a pressure drop of 0.5 bar.
- Materials: Bodies are usually made of brass, but stainless steel versions (AISI 303/316L) are also available for applications requiring corrosion resistance.
Rectus Quick Couplings Series 21
Rectus series 21 quick couplings are characterized by small sizes, high flow efficiency (up to 560 l/min at DN 5), and versatility. They are miniature industrial connectors with a popular profile, available in single and double shut-off versions as well as free flow, allowing them to be adapted to various applications in pneumatics and fluid transport, often in places where space is limited.
Key features of series 21:
- Compact design: ideal for applications where space is limited, making them versatile in many industries.
- High efficiency: despite their small size, they provide significant flow efficiency, e.g. 560 l/min at DN 5.
- Variety of shut-off types: available in single shut-off, double shut-off, and free flow versions, allowing for a solution tailored to specific needs.
- Wide application: used in pneumatic automation, industrial machines, dosing systems, medical devices, and automotive.
- Ease of use: can be operated with one hand, and due to high-quality construction, they are durable and reliable.
Rectus Quick Couplings Series 27
Rectus series 27 quick couplings are characterized by high air flow (up to 3500 l/min), durable construction (locking steel sleeve, nickel-plated brass, stainless steel options) and easy one-handed operation. They are designed for heavy industrial applications, handling high pressure up to 35 bar, compatible with other popular types of connectors, and available in single and double shut-off versions.
Key features of series 27 quick couplings:
- High efficiency: Large air flow (up to 3500 l/min in series 1727 models) with minimal pressure drop.
- Durability: Made from durable materials such as nickel-plated brass or stainless steel, with a solid steel locking sleeve.
- Ease of use: Simple one-handed operation, increasing comfort and safety.
- Versatility: Available in various versions: Single and double shut-off (with valves in the quick coupling and plug).
- Made from corrosion-resistant materials (stainless steel, acid-resistant).
- With a pressure-free disconnection system.
- Wide operating range: Designed to operate over a wide temperature range (from -40°C to +316°C, depending on the medium and seals) and pressures (up to 35 bar).
Rectus Quick Couplings Series 57
Rectus series 57 quick couplings are characterized by high working pressure (up to 35 bar) and a wide temperature range (from -20 to +100 degrees C). They provide low pressure losses, resulting in high throughput and are designed for use with various media such as compressed air, inert gases, water, or mineral oils.
Key features:
- Working pressure: Maximum 35 bar (considering a safety factor of 4:1)
- Temperature range: From -20 to +100 degrees C (depending on the medium and the seal used, e.g. NBR).
- Medium: Air, inert gases, water, mineral oils, fuels.
- Low pressure drop: Ensures high throughput and maximum flow for a given diameter.
Connection force: Low force needed to connect (e.g. 40 N at 0 bar pressure and 80 N at 6 bar pressure).
