Express Fitting with Female Threaded End, with Mounted Seal

Express Fitting with Female Threaded End and Mounted Seal Ezfitt (Reference: 511) represents the professional quick-connect solution for your water and compressed air installations. Designed according to the rigorous French standard NF E29-573, this heavy-duty brass forged fitting integrates a pre-mounted NBR lip seal for immediate and lasting tightness. Its robust design and advanced technical characteristics make it the ideal ally for demanding professionals.

Applications and sectors of use

This Express fitting finds its place in multiple professional environments thanks to its versatility. In industry, it equips compressed air networks in production workshops, service stations and automotive garages. Its water-air compatibility makes it indispensable for mixed installations.

The agricultural sector adopts it extensively for irrigation systems, phytosanitary treatment equipment and washing installations. Local authorities and technical services use it for their water distribution networks, public fountains and green space irrigation. Its robustness also makes it a preferred choice for marine and port applications.

Technical specifications and innovation

The design according to standard NF E29-573 with a 41 mm claw spacing guarantees universal compatibility with all Express fittings of the same standard. This standardisation ensures interchangeability and simplifies maintenance of existing installations. The forged brass chosen for its manufacture offers superior resistance to corrosion and mechanical stress.

The pre-mounted type A NBR lip seal (nitrile butadiene rubber) is a major asset. This elastomer material offers excellent resistance to hydrocarbons, ozone and thermal variations. The 15 mm bore optimises flow while maintaining perfect sealing.

The machined ribbed tail with collar allows secure mounting on flexible hoses. This design prevents accidental disconnection under pressure and facilitates maintenance operations. The ISO 228-1 gas thread complies with international standards for extended compatibility.

Installation and implementation

Installing the 511 fitting requires a few precautions to optimise its performance. Before assembly, check the condition of the pre-mounted seal and carefully clean the contact surfaces. The female thread must be free of chips and debris.

For connection to flexible hose, slide the hose clamp on before pushing the hose onto the ribbed tail up to the collar. Gradually tighten the clamp to ensure uniform fixing without excessive deformation of the hose. A moderate tightening torque is sufficient thanks to the ribs that ensure grip.

The Express connection is made by simple engagement until the locking click. Verify that the claws are properly engaged before pressurising. A leak test at reduced pressure is recommended before nominal use.

Expert advice and product synergies

To maximise the service life of your installations, strictly observe the temperature limits (-10°C / +70°C) and pressure limits (PN 10 bar). In the event of regular exposure to extreme temperatures, periodically check the condition of the NBR seal.

Complete your installation with clamps 515/1515 specially designed for this fitting. These clamps ensure optimal retention without risk of over-tightening. For high-demand installations, prefer textile-reinforced hoses that better resist high pressures.

In industrial environments, avoid bending stresses on the fitting by providing intermediate supports. For seasonal applications, completely drain the circuit before frost periods to preserve seal integrity.

The universal compatibility with standard NF E29-573 allows you to mix different brands in your installation. This interchangeability facilitates emergency repairs and optimises stock management.

Technical specifications