Overfill prevention device

OPD NT type for the chemical industry (EX)

SelfClimat overfill prevention devices stand out for their reliability and very high level of safety, which reassures the customers. Thanks to precision engineering and an unparalleled level of finish, SelfClimat offers you an exceptional overfill protection device.

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OPD NT type for the chemical industry (EX)


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A mechanical overflow prevention device with 100% safety, preventing risks of overflowing.


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Designed for aviation fuels, biofuels, additives, other petroleum products, miscellanerous products.

Unique concept

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The Self Climat mechanical overfill prevention device provides the highest level of safety and constitutes a guarantee against pollution in the field of storage of all types of liquids:

  • It provides total closure and not a reduction in flow
  • It is fully metallic and completely free of seals
  • It has no wearing parts and does not require any maintenance
  • It functions in all situations: gravity or pump filling
  • It is easy to install: it fits under the manhole cover inside the tank
  • It is tested individually on a test rig to obtain a serial number

The production of the overfill prevention device is divided into different models but the operating principle remains the same in all cases (N, NT and INOX series). The materials used and the treatment the parts receive enable applications to be found in all industrial sectors.

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  • Delivered ready to fit
  • An all-metal product containing no seals
  • Requires no maintenance, or adjustment
  • Works by gravity and pumping
  • All our overfill prevention devices are individually tested on a test rig to obtain a unique serial number
  • Satisfy the requirements of the NF EN 13616, KIWA, VLAREM II and ATEX standards
  • Compatibility with a very wide variety of liquids that can be used in the chemical, petrochemical and food industries.

Characteristics and standards

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  • Available in DN50 NT and DN80 NT
  • Working temperature: -25°C to +60°C
  • Flow up to 60 m3/h (depending on model)
  • Pressure up to 8 bar (depending on model)
  • Compliant with European standard: NF EN 13616
  • Compliant with Dutch standard: KIWA BRL-K-636/03
  • Compliant with American standard: UL 2583
  • Compliant with Canadian standard: CAN/ULC-S661-10 (R2016)