About us

World reference in the design, manufacturing and distribution of electromagnetic brakes.

  • 1962

    KLAM RETARDERS is established

    Objective: design and manufacture electromagnetic retarders for all kind of commercial and industrial vehicles.

  • 1972

    Over 100 units manufactured and sold.

  • 1988

    Alvarez brothers -Javier and Jose Antonio- which are the current Directors, join the Company.

  • 1994

    More than 5.000 brakes are commercialized.

    Due to the improvements introduced in the production process, and a strong commercial activity, this sale of brakes is achieved, implying sales exceeding 6 M€

  • 1996

    Acquisition of COFRESA

  • 2000

    ISO 9000:1994 Certification

  • 2001

    Penetration in the US market.

  • 2003

    New electronic system EPM/ECM is launched into the market.

  • 2004

    Establishment of KLAM AMERICA CORP.

    At Denver, CO, premises activities such as assembly on vehicles, sales, aftersales services, and distributors trainings are performed.

  • 2006

    Development of the second generation of the ECS electronic control and management system.

  • 2009

    New layout in our manufacturing plant with state-of-the-art machinery.

  • 2014

    TS 16949 Concession

  • 2016

    Starting the IATF16949:2016 certification process

  • 2017

    Enlargement of Production and Office areas.

  • 2018

    IATF 16949:2016 Certification

  • 2019

    New York

    Fire Department (NYFD) trusts on KLAM as its sole supplier for electromagnetic brakes.


World reference in the design, manufacturing and distribution of electromagnetic brakes. Daring and non-conformist, we provide safety and savings both to companies and individuals of the industrial, wind and transport sectors.

Since ZELU INDUSTRIES establishment in 1962 we have learned that the core idea of our company is to obtain the total satisfaction of our clients adapting ourselves, developing and incorporating new technologies and materials achieving to cover the latent market needs. No doubt this is the path and philosophy in which we will continue working from now onwards.

We will continue innovating in the design and manufacturing of an electromagnetic brake more effective and efficient, that together with our quality on service will allow us to consolidate our position as the undisputed market leaders.



To be highly effective and efficient to solve our clients’ problems.


Near and close to our clients and employees.

to change

Innovation, open attitude, search for new markets and projection.


Capacity to adapt ourselves when facing any Project or challenge.


Rerseverance in achieving our targets not being discouraged in front of any adversity that may arise.



From KLAM RETARDERS we want to inform all our suppliers about the legal and statutory requirements to which they must adhere to and that must be transmitted along their productive chain down to the manufacturing location.

The applicable requirements and regulations are the following:

  1. Labour Legislation::

    The existing one at the production/distribution locations.

  2. Environmental Legislation:

    The existing one at the production/distribution locations.

  3. Use of forbidden materials:

    Suppliers of KLAM RETARDERS compromise not to use the so-called “blood minerals” in the products supplied.

  4. Products special characteristics:

    The products supplied to KLAM RETARDERS must comply with the requirements specified in the purchase orders or purchase agreements. It’s understood that these products should be supplied free of faults or defects (pores, structural cracks…)

As well, we inform current and future suppliers that the system that will be used for its control and tracking will be the following:

Even so, periodically, we will proceed to review its aptitude as supplier. As well, those suppliers whose results have been under the expected, will be duly informed.



To make and enquiry or ask for information, please kindly fill the following form: