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Product news
23.02.2022  |  3633x
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Stainless steel screw conveyor with ATEX certification and FDA requirements

Screw feeder with ATEX certification and FDA approval

Sinfimasa presents a solution for dosing very fine, explosive bulk solids, in this case active ingredients of medicines.
In a practical situation, dosing of 300 litres per hour of micronised bulk product (active ingredients of medicines) was required. As the substance was explosive, a machine with ATEX GAS 1 certification was provided.

Sinfimasa designed a stainless steel 316 tube screw feeder, suitable for ATEX zone 1 (2G). A screw of 70 mm and a tube of 80 mm were chosen, so that there is a large clearance. The screw is driven by a 0.75 kW ATEX certified motor gearbox.

All parts that may come into contact with the product, such as seals, plastics, grease, etc., are FDA-compliant thanks to the hygienic, easy-to-clean design.

The product itself is a sticky product, so the tube is manufactured with a glossy polished (g220) inner surface and an industrial satin matt outer surface.

In accordance with directive 2014/34/EU, equipment and protective systems intended for use in potentially explosive atmospheres must be designed with a view to integrating explosion protection. These protective measures designed and implemented by Sinfimasa will be documented in a technical file kept by a competent authority in order to:
  • prevent the generation or release of explosive atmospheres by equipment and protective systems themselves;
  • prevent the ignition of explosive atmospheres, taking into account the nature of any electrical or non-electrical source of ignition;
  • if an explosion does occur which may, directly or indirectly, endanger persons, domestic animals or property, be able to halt it immediately or reduce the area affected by the flame and the pressure produced by the explosion to a sufficient level of safety.

The instrumentation of the screw (e.g. temperature, rotation and anti-clogging sensors), the drive (SEW ATEX gas motor gearbox) and the design of the screw ensure the suitability of the machine for the area in which it will be used in accordance with the applicable standards.

Company information

Sinfimasa
Sinfimasa
Experience and Commitment The main business of Sinfines y Maquinaria S.A. (Sinfimasa) is to understand the customer and design and manufacture conveyors according to project requirements and the specifications of the solid material to be handled. At our facilities in Guissona (Spain), we have our own engineering department with over 35 years’ experience, where we design machines that meet our customers’ technical specifications and make our commitment to their engineering project. We offer solutions for conveying and lifting bulk solids with uncompromising quality and precision, and we ensure equipment reliability in every situation in the processing plant. Safe, Robust, Reliable In our production plant we manufacture products with all types of finishes as required: pickled and passivated, electro-polished, lacquered, sandblasted and food-grade, etc. We work with different materials such as carbon steel, stainless steel and anti-wear steel. We use high quality and universally available components such as SEW gearmotors or SKF bearings. Our suppliers are also key to our success and we make a commitment to them. We have a test bench where, based on product samples from our customers, we research the best solution for the requirements of each project. We are committed to our customers and engineering companies to offer machines with guaranteed reliability. Sinfimasa has welding procedures and welders approved according to ASME Section IX (QW-484). We use an automated welding system to ensure that the entire length of the conveyors are welded evenly and are free from voids. At Sinfimasa we are rigorous and demanding, with numerous references in several countries on all five continents as our guarantee. Please ask us for more information as you require. Consult us about your project on no obligation. We will make you a reliable technical proposal that is 100% adapted to your requirements.
Last update: 18.03.2024

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Case: Conveying of chemical powder in ATEX Zone 1/21  SINFIMASA designed and manufactured a 3.5 m screw conveyor, 
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SINFIMASA designed and manufactured a 3.5 m screw conveyor, completely in 316L stainless steel with satin polish, ATEX certified for zone 1/21 to extract chemical powder. Our client in the pharmaceutical sector needed a conveyor to extract chemical powder from a tank in a closed room with a nitrogen stream inertisation system. The machine needed to be ATEX Zone 1/21 certified and approved for this type of location. Other requirements were a flow rate of 3m3/h and an inclination of 29º. The main difficulty of this project was the working conditions in a highly explosive area. SINFIMASA has designed and manufactured a TS-150/170 screw conveyor model 3.470 mm length between inlet and outlet with ATEX certification, all in 316L stainless steel (trough, cover and screw), finished in satin polish. The conveyor is equipped with a 3 kW SEW gear motor. Sinfimasa has carried out the following markings: * Ex II 2 G Ex h IIB T3 Gb (zone 1 - GAS) * Ex II 2 D Ex h IIIC T160ºC Db (zone 21 - DUST) These will be send with the documentation of use and warnings in the language of the country of destination.
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