Portex, Manufacturer of Watertight Doors for Tanks and Containers

For over 80 years, Portex has been designing and manufacturing watertight steel or stainless-steel doors for industrial tanks and containers in France. Whatever your needs, a proven solution is available. Our wide range of doors allow us to meet the requirements of the food, chemical, and pharmaceutical industries. With a permanent stock, proven responsiveness, and recognized expertise, we deliver worldwide.

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A Complete Range of ready to weld Watertight Doors

A proven solution for every industrial need.

Portex manufactures watertight doors designed to fit industrial tanks. Whether you need round, rectangular, oval, with or without pressure, doors for embedding, autoclave doors, each product is engineered to ensure perfect watertightness, even under extreme conditions.

These doors facilitate access to tanks for inspection, cleaning, or maintenance, while ensuring maximum safety.

Mild Steel or Stainless Steel – Choose the Right Performance

Our doors are available in carbon steel or stainless steel (304L and 316L) to meet the demands of industries such as food processing, petrochemicals, waste management, and pharmaceuticals. Each material is selected for its resistance to pressure, corrosion, and cleaning agents.

Selecting the right alloy ensures the durability of the installation and compliance with standards.

Round Doors

Ideal for tanks with circular geometry, our watertight round doors provide easy access while ensuring excellent pressure resistance.

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Rectangular Doors

Versatile and practical, rectangular doors offer a wide opening for the inspection and cleaning of industrial tanks.

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Oval Doors

Compact and efficient, our oval doors combine sealing performance with reduced bulk to adapt to your installation constraints.

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Embedded Doors

Designed for direct integration into tank walls, weld-in doors ensure secure installation and long-lasting watertightness.

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Autoclave Doors

Our autoclave doors are designed to withstand high-temperature sterilization cycles and ensure the safety of sensitive processes. The door opens inward into the vessel.

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High-Pressure Autoclave Doors

For applications under extreme conditions, high-pressure autoclave doors ensure maximum sealing in harsh environments.

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Bolted Manholes

Easy to install and maintain, these technical access points allow quick intervention inside the tank. The bolted system ensures solid closure and excellent mechanical strength.

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Hublots

These observation devices provide direct visibility of the contents or internal process. They are designed to withstand thermal pressures and chemical agents.

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Portex – French Know-How and Controlled Manufacturing

For over 80 years, Portex has been committed to manufacturing watertight steel and stainless-steel doors for tanks and containers. Originally part of Promécam’s specialized division, the company became independent in 1985 with a clear objective: to provide reliable, easy-to-integrate, and long-lasting sealing solutions. This French industrial know-how has grown over the years to offer today a complete range, renowned for its quality, robustness, and availability.

Portex ensures full control of the production chain and perfect traceability of components.

Thanks to a permanent stock of thousands of references, Portex meets industrial needs by shipping most orders within 24 hours in France and internationally.

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Discover our story

Why choose Portex for your waterproof doors?

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Availability & responsiveness

Permanent stock and shipping within 24 hours. Express quotes, technical advice and personalized follow-up.

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Sustainable French Manufacturing

Doors designed to last, manufactured in France, using robust materials.

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Sector Expertise

Proven solutions for the food industry, chemicals, pharmaceuticals, water treatment, and waste management.

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International Presence

Delivery worldwide thanks to the recognized reliability of our products.

Our News

Portex continuously monitors technical developments, industrial standards, and market needs. We regularly participate in trade shows in France and abroad to present our innovations and meet our partners.

PORTEX WILL BE EXHIBITING AT VRACTECH DOUAI 2026

Sep 1, 2026

Gayant Expo – Douai (France) 17–19 November 2026 We are pleased to announce that Portex will be exhibiting at Vractech Douai 2026, taking place from 17 to 19 November 2026 at Gayant Expo in Douai, France. Vractech is the leading trade exhibition dedicated to...