Carl Stahl Kromer

ATEX Spring Balancers - Safe load positioning in explosive environments

The Kromer ATEX spring balancer series was specially developed for areas in which explosive atmospheres though flammable gases or combustible dust can occur. It benefits from over 100 years of experience in the development and manufacture of spring balances and is characterized above all by its high product safety and quality. The ATEX spring balancers or also known as tool balancers, are neutralizing the weight of loads such as tools, work equipment or hoses and are positioning them at a desired height. As a result, work steps in assembly and production can be carried out more quickly, more precisely and fatigue-free. The Kromer ATEX balancer series is covers a load range of 15 to 55 kg and ensures a working stroke of 2 m.

A worker is pointing on a big hose which is beeing held by an balancer. the hose therefore is fixed in a height.
A worker fills oil from a device through a hose. The hose is held by an ATEX balancer to ensure fatigue-free working.
ATEX Balancers

ATEX Balancer Type 7235 EX

Load range: 15 – 55 kg   |   Cable travel: 2 m

  • Freely rotating and swiveling screw-type spring hook for suspension
  • Integrated ground connection
  • Cable drum of high-strength chill-cast aluminum
  • Integrated device for blocking the cable drum
  • Infinitely variable load setting via endless screw
  • Closed ball bearings
  • Higg performance load spring
  • High-strength steel cable
  • Fast cable replacement system
  • Infinitely adjustable cable stop buffer
  • Screw-type spring hook for load suspension
  • A longer cable is available upon request

  • ATEX compliance for gas: II 2/2G Ex h llA + ethanol T6 Gb/Gb
  • ATEX compliance for dust: ll 2/2D Ex h lllC T85°C Db/Db
  • Integrated earth connection against static charging
  • Additional fall protection chain
  • Top suspension via high-strength safety hook
  • Spring break protection
  • Encapsulated spring
  • Bottom suspension for loads with safety screw type carabiner
  • 100% quality controls by Kromer

ATEX Balancer Type 7235 EX
Product table
ID no. Load rangein kg Cable travelin m Own weightin kg Inquireprices / details
7235 EX00 01 15.0 - 25.0 2.0 7.80
7235 EX00 02 25.0 - 35.0 2.0 8.90
7235 EX00 03 35.0 - 45.0 2.0 9.50
7235 EX00 04 45.0 - 55.0 2.0 9.75
Catalog / Drawing / Manual
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The main benefits of spring balancers

Basically, the ATEX balancer type 7235 EX has got two main functions: The weight compensation function and the storage function:

Weight compensation function:

  • Fatigue-free work even over long periods of time
  • Sensitive and prices work and improved handling of applications
  • Protection of employees from overload

Storage function:

  • Increased safety in the workplace through improved structure and organization
  • Reduced costs by shortening throughput times thanks to ergonomic workplace design I
  • Increase in productivity through improved handling of applications
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The ATEX balancer type 7235 EX can be used in the following EX zones

The requirements for machines and products vary from industry to industry. Wherever flammable substances such as gases or dusts are manufactured, processed, transported or stored, however, safety plays a particularly important role. Especially in the chemical and petrochemical industry, or in oil and gas production.

The risk of an explosion is based on the probability of the simultaneous occurrence of fuels (concentration of ignitable gases, vapors or dust particles) and oxygen over a certain period of time, which are defined by EX-Zones. The ATEX balancer type 7235 EX is designed for the following ATEX zones:

ATEX protection zone 1 - Explosions though flammable gases:
Area in which an explosive atmosphere consisting of a mixture of air and flammable substances in the form of gas, vapor or mist can be expected during normal operation.

ATEX protection zone 21 – Explosions though combustible dust:
Area in which it is to be expected that an explosive atmosphere in the form of a cloud of combustible dust in air can occasionally occur during normal operation.

ATEX Compliance - flammable Gases:

Logo ATEX Compliance Gas
Mark Category Description
II: Group For use in locations with explosive atmospheres, except in the mining sector.
2/2G: Category 2 (Zone 1 Gas) Use in areas in which an explosive atmosphere consisting of gases, vapors and mists can occasionally occur.
Ex h: Ignition protection category Protection through constructive safety according to EN ISO 80079-37 (non-electrical devices)
llA: Explosion group Classification of gases based on their ignitability. The dangerousness of the gases increases from A to C. Covers all gases from A and also the gas ethanol from B.
T6: Temperature class Defines ignition ranges based on the ignition temperatures of substances. With> 85 ° C, T6 is the class with the highest requirements.
Gb/Gb: Equipment protection level (EPL) Does not contain any effective ignition sources with regard to gases during normal operation and in the event of expected malfunctions.

ATEX Compliance - Combustible Dust:

Logo ATEX Compliance Dust
Mark Category Description
II: Group For use in locations with explosive atmospheres, except in the mining sector
2/2D: Category 2 (Zone 21 Dust) Use in areas in which an explosive atmosphere consisting of dust / air mixtures can occasionally occur.
Ex h: Ignition protection category Protection through constructive safety according to EN ISO 80079-37
llC: Dust group C Can also be used with conductive dust. This group “C” includes all other groups.
T85°C: Max. surface temperature Can be used for dusts and dust deposits with an ignition or smoldering temperature above 85°C.
Db/Db: Equipment protection level (EPL) In normal operation and in the event of expected malfunctions, it does not contain any effective sources of ignition with regard to dust.

ATTENTION: Further important information on the correct use of the ATEX Balancer Type 7235 EX can be found in our user manual. In addition, you can also contact our technical support at any time if you have any further questions. We are happy to advise and assist you.

Balancer for industries with explosive areas

Thanks to the explosion-proof design of the Kromer ATEX balancer, it can be used in areas with flammable gases and dusts. Typical industries with potentially explosive areas include the oil, gas, chemical and wood processing industries. In addition, there are many other areas of application in which an ATEX balancer can be used profitably…

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