Can the Twisted coupling for pneumatic hoses bulkhead, type C4 withstand 18 bar working pressure when connected to soft plastic hoses with the nut fully tightened?

Yes . the Twisted coupling for pneumatic hoses bulkhead, type C4 can withstand 18 bar working pressure when used as intended. The C4 type bulkhead socket coupling is specifically designed for connecting soft plastic hoses by pushing the hose onto the fitting and securing it with the nut. Made of nickelâplated brass and specified with a working pressure of 18 bar, the couplingâs rated performance assumes correct installation: use compatible soft plastic hoses of the recommended inner diameter, fully push the hose onto the barb, and tighten the nut completely to ensure a proper seal and mechanical retention. Improper hose choice, incomplete insertion, damaged hose ends, or inadequate tightening can compromise the connection and reduce safe working pressure. For critical or safetyâsensitive applications, verify hose compatibility, follow manufacturer torque/install instructions if provided, and consider pressure testing after assembly.

Does the Twisted coupling for pneumatic hoses bulkhead, type C4 require hose clamps in addition to the nut for safe 18 bar operation with soft plastic hoses?

Twisted coupling for pneumatic hoses bulkhead, type C4 is designed for soft-plastic hoses to be secured by pushing the hose onto the fitting and tightening the nut. At the stated working pressure of 18 bar, relying solely on the nut compression can be acceptable if: the hose inner diameter matches the fitting precisely, the nut provides sufficient mechanical bite, the hose material is rated for 18 bar and the installation is inspected and properly assembled. However, soft plastic hoses can creep or deform under pressure and temperature changes; for critical or safety-important applications and long-term reliability it is recommended to use hose clamps or crimp sleeves in addition to the nut. If manufacturer documentation or certification explicitly states clamps are unnecessary for 18 bar with specific hose types, follow that guidance; otherwise add clamps for a safer connection.

Is the Twisted coupling for pneumatic hoses bulkhead, type C4 suitable for repeated assembly/disassembly with soft plastic hoses at 18 bar?

Twisted coupling for pneumatic hoses bulkhead, type C4 is designed for connecting hoses made of soft plastics, using a push-on fitting tightened by screwing on the nut, made of nickel-plated brass, with a working pressure of 18 bar. For repeated assembly/disassembly with soft plastic hoses at 18 bar this coupling can be suitable, but with important caveats: - Mechanical wear: Repeated push-on and removal will abrade and deform soft plastic hose ends and the fittingâs bore or barbs over time, reducing sealing integrity and retention. Expect progressive wear faster than with reinforced or reusable-specific fittings. - Seal reliability at 18 bar: The stated working pressure is 18 bar, so the coupling can operate at that pressure if assembly is correct and components are undamaged. However, repeated cycles increase risk of leaks or hose blow-off, especially near the upper pressure limit. - Nut tightening: Proper torque and secure tightening on each reassembly are essential. Over- or under-tightening accelerates wear or causes damage to the hose. - Material compatibility: Nickel-plated brass is generally compatible with many soft plastics, but specific hose material (e.g., PVC, polyurethane, silicone) matters for long-term abrasion and cold/heat performance. - Recommended mitigations: Use fresh cut hose ends, inspect for cuts/deformation each cycle, use hose clamps or backup retention if frequent disassembly is required, consider using hose reinforcements or couplings designed for multiple reuses (e.g., reusable push-to-connect or crimped fittings), and test assemblies under pressure before return to service. Conclusion: Twisted coupling for pneumatic hoses bulkhead, type C4 can work for repeated assembly/disassembly at 18 bar in occasional-use scenarios with careful inspection and correct tightening, but for frequent cycles or critical applications it is not the optimal choice due to accelerated wear and increased leak/blow-off risk.

Bulkhead screw-together fitting for pneumatic hoses, type C4

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Additional information

Material	B – brass (bronze)

Push-on bulkhead coupling, type C4, designed for connecting hoses made of soft plastics. The connection is made by pushing the hose onto the fitting and clamping it by tightening the nut. Material: nickel-plated brass. Working pressure: 18 bar.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
MW-2304001	Straight fitting grodziowa C4, hose 6/4 - hose 6/4	-	16	In stock	Enquiry
MW-2304002	Straight fitting grodziowa C4, hose 8/6 - hose 8/6	-	16	In stock	Enquiry
MW-2304003	Straight fitting grodziowa C4, hose 10/8 - hose 10/8	-	16	In stock	Enquiry
MW-2304004	Straight fitting grodziowa C4, hose 12/10 - hose 12/10	-	16	In stock	Enquiry

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Push-on bulkhead coupling, type C4, designed for connecting hoses made of soft plastics. The connection is made by pushing the hose onto the fitting and clamping it by tightening the nut. Material: nickel-plated brass. Working pressure: 18 bar.