Air Cooler Plug | Euroseal® GP Plug

Innovative Plug for Air Coolers – Patent 2020

  • Self-centering gasket profile: sealing is centered on the plug, not the seat – eliminating radial clearance.
  • Significant reduction in tightening torque: less mechanical stress on the seats and prevention of seizing.
  • Perfect flatness and burr-free surface ensured by CNC lathe machining.
    Custom-engineered and configured to specification.


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High-Reliability Patented Air Cooler Plug – Euroseal® GP Plug

Euroseal® GP Plug is the innovative air cooler plug pante by General Packing and designed to effectively transfer the tightening torque to the sealing gasket.

Its unique, burr-free, self-centering profile ensures perfect gasket positioning, evenly distributing the load across the entire exchanger contact surface.

The Euroseal® GP Plug – Kap Seal system, available in all metallurgies, is the most effective solution for critical bundles, where thermal and pressure cycles adversely affect sealing performance. This sealing system has been tested by several Italian air cooler manufacturers, showing excellent sealing performance with tightening loads lower than the theoretical values.

Distinctive Technical Features

  • Threaded plug machined from solid bar stock on CNC lathes to ensure flatness and burr-free surfaces.
  • Thread checked with go/no-go gauge rings.
  • Self-centering burr-free profile ensures precise gasket positioning and even load distribution across the entire sealing area.
  • Custom-engineered and available in all metallurgies.
  • Custom marking available on the GP Plug hex head (dimensions, metallurgy, torque values, exchanger ID…).
  • Significant reduction in tightening torque: less mechanical stress on seats and prevention of seizing.
  • For carbon steel plugs, PTFE anti-corrosion protective coating is recommended.
  • Optional balancing hole to equalize pressure on the gasket and enable maintenance with the air cooler in operation.

Patent

Patent filed with the Ministry of Economic Development – 2020

Testing & Certifications – Euroseal® GP Plug + Kap Seal Gasket

  • Sealing test at 200 bar with torque reduced from 600 Nm to 75 Nm.
  • Helium (97%) sealing test at 300 bar and -40°C.
  • Sealing test at 50 bar with a -50% reduction in minimum recommended torque.
  • Mechanical validation test according to ASME VIII standards.

Sustainability & Environmental Focus

Each component is designed with the highest environmental standards. Packaging is entirely plastic-free, using recycled paper protections and eco-friendly surface coatings, with packing suitable for safe storage of thread integrity and gasket quality.

Applications & Use Cases

Ideal for chemical plants, petrochemical sites, refineries, and thermal power stations. Recommended for air coolers with threaded perforated plates where maximum sealing reliability and zero leakage are critical.

Why Choose the Euroseal® GP Plug + Kap Seal System?

The Euroseal® GP Plug + Kap Seal sealing system is the result of General Packing Italy’s expertise — a leader in industrial sealing, committed to developing efficient, sustainable, and innovative solutions.

Designed and engineered to ensure maximum sealing performance, safety, easy maintenance, and reduced plant downtime.

Your Custom Plug for Air Coolers – Online Form

For an initial feasibility study of the Euroseal® GP Plug sealing system – air cooler plug – you can fill out the online form, which will be evaluated by our engineering team. For further inquiries, feel free to contact us: export@generalpacking.com

Dimensioni tappo per air cooler

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Datasheet

Datasheet download

Applications

• Air cooler.

Case Study

Technical FAQ

What is Euroseal® GP Plug by General Packing?

Euroseal® GP Plug is a patented plug for air coolers, designed to ensure effective and safe tightening even under critical temperature and pressure conditions. It features a self-centering system that improves load distribution on the gasket.

What are the advantages of GP Plug compared to standard plugs?

Compared to traditional plugs, GP Plug ensures perfect centering of the Kap-Seal gasket, reduces the required tightening torque, and prevents thread seizure and damage, increasing sealing reliability and service life.

In which applications is GP Plug recommended?

It is ideal for critical plants such as refineries, power stations, chemical and petrochemical plants, where air coolers are subjected to high thermal cycles and pressures.

What type of gasket is used with GP Plug?

The sealing system is based on the Euroseal® Kap-Seal gasket, a camprofile gasket coated with graphite, designed to guarantee high sealing performance even with reduced tightening loads.

Can GP Plug be installed with air coolers in operation?

Yes. On request, it can be supplied with a balancing hole to compensate for pressure on the gasket, allowing maintenance operations even while the plant is running.

In which metallurgies is GP Plug available?

GP Plug can be manufactured in all metallurgies, including AISI 304, AISI 316, 347, Inconel, and special materials to resist aggressive chemicals and high temperatures.

Which tests has GP Plug passed?

The GP Plug + Kap-Seal system has been successfully tested up to 330 bar, ensuring excellent sealing even at tightening torques lower than theoretical values. It has passed pressure tests, helium tests, and ASME VIII risk analysis verification.

Is customized marking available on GP Plug?

Yes. The plug head can be customized with information such as size, metallurgy, tightening torque, and heat exchanger identification.

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