Atsarginis NBR tarpiklis, skirtas naginėms movoms su apsaugine veržle DIN 3238
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Threaded claw couplings DIN 3238 with locking nut
Blast hose couplings and threaded claw couplings in accordance with DIN 3238 combine the quick handling of a claw coupling with an additional mechanical lock. After the coupling halves are brought together, the connection is locked in place using the locking nut. This distinguishes this system from a classic claw coupling without an additional screw lock.
This category includes not only hose couplings but also the complete DIN 3238 system currently available, featuring male-thread and female-thread couplings, various hose designs, and a matching NBR replacement gasket. The couplings are made of steel or cast iron with a galvanized finish and are designed for professional compressed air applications.
Select a male-thread coupling or a female-thread coupling
Models with male and female threads are available for direct connection to fittings, piping, or compressed air components. It is crucial that the thread type and thread size match the mating part exactly. In the current product line, the thread sizes range from G 3/8 inch to G 1 inch.
When planning, the connection cross-section must not be considered in isolation. Especially with compressed-air consumers that have a high flow rate, pipes, hoses, or fittings that are too small can cause significant pressure losses. The coupling should therefore always be sized to match the entire piping system.
Hose couplings with different collar designs
For DIN 3238 blast hose couplings, various connection options are available for flexible compressed-air hoses. The product range includes versions without a safety collar, with a safety collar, and a version with a crimp ferrule collar. The appropriate version depends on the hose, the type of mounting, and the intended application.
The specified hose diameter must match that of the hose being used. A cross-section that is too small can restrict air flow, while an improper mechanical connection poses a safety risk. The hose and coupling must therefore be considered as a single assembly.
Locking nut as an additional mechanical lock
The defining feature of DIN 3238 couplings is the locking nut. It serves to provide additional mechanical locking of the coupled connection and to prevent accidental disengagement of the claw coupling. However, the locking nut is no substitute for proper installation or regular inspection of the entire compressed-air line.
Before commissioning, the coupling halves must be fully connected and the safety lock properly engaged. Before disconnecting a connection, the line must be completely depressurized.
Selecting the Right DIN 3238 Couplings
✅ Select the appropriate external or female thread or hose connection for the system
✅ Match thread and hose sizes exactly to the corresponding part
✅ Fully lock the locking nut before pressurizing
✅ Check the NBR seal regularly for wear and damage
✅ Observe the maximum permissible operating pressure of the entire system
NBR seal as an important wear part
DIN 3238 couplings are sealed with an NBR rubber seal. When the coupling is properly connected, this seal ensures the necessary seal between the coupling halves. Over time, seals can age, become deformed, or suffer mechanical damage. A matching replacement gasket is therefore available as a separate wear part.
If leaks occur, do not simply apply more force to the connection. First, check the gasket, clamps, sealing surfaces, and locking nuts for wear or damage. Defective components must be replaced.
Applications in compressed air technology, workshops, and industry
Threaded claw couplings to DIN 3238 are suitable for compressed air networks, mobile lines, and industrial applications where a detachable connection with additional mechanical locking is required. The couplings in the product line are designed for the respective maximum operating pressure specified. However, for operational safety, the component with the lowest permissible pressure rating in the entire system is always the determining factor.
Buy blast hose couplings with locking nuts per DIN 3238
If you want to purchase hose couplings with a locking nut per DIN 3238, you should first determine the connection type, thread or hose size, flange design, and required operating pressure. This will allow you to select the right threaded claw coupling. In this category, you’ll find threaded couplings, blast hose couplings, and replacement seals for setting up professionally secured compressed-air connections.
