Circular pumps BFP ATEX-2GD

Product catalog summary

Introduction and Description
The document discusses the BFP ATEX-2GD series of circular pumps by Bühler Technologies GmbH, designed for use in explosive areas such as machine construction and raw material production. These pumps are noted for their stable operating conditions, low noise emissions, high volumetric efficiency, and good suction performance. The gerotor principle is highlighted for its low noise and steady flow rate, making it ideal for hydraulic and lubrication systems.

Specifications
The pumps are suitable for explosive zones 1 (gas) and 21 (dust) with a temperature class of T4. They are compact, durable, and designed to minimize space and cost. The ATEX marking provides information on equipment category, group, ex-atmosphere, ignition protection type, and temperature class.

Technical Data
Pump housing is made of anodised and impregnated cast aluminium, with motor housing in aluminium die casting and motor flange in grey cast iron. The gerotor is made of sintered steel. Operating fluids include mineral oils and gear oil, with operating pressures varying by model. The pumps operate at a maximum oil temperature of 80°C and ambient temperatures between -15 to 40°C. Electric motors are three-phase asynchronous squirrel-cage induction motors, complying with IEC standards.

Pump Selection and Installation
Selection of pump models should consider motor output relative to oil viscosity. Special versions with internal bypass valves are available. Installation allows for the pump head to be mounted in 90° increments, with connection threads manufactured to ISO 228 standards.

Model Details
The document provides detailed specifications for various models (BFP 8, 15, 30, 40, 60, 90), including motor power, maximum oil viscosity, operating pressure, and dimensions. Acoustic power levels and weight are also specified for each model.

Conclusion
The BFP ATEX-2GD series offers a range of pumps suitable for explosive environments, with a focus on compact design, efficiency, and compliance with safety standards.

Catalog excerpts

Circular pumps BFP ATEX-2GD Drives and hydraulic aggregates with bypass filter and/or cooler are also used in explosive areas in machine construction or raw material production. The advantage of these circuits is that they create stable and therefore more predictable operating conditions for both the filtration and cooling. Circulating oil in these circuits requires efficient and preferably silent circulation pumps which provide a constant flow rate at moderate pressures. Internal gear pumps have proved especially useful for these applications. They offer compact integration, are relatively insusceptible to particle contamination and have a long life. ATEX area of application: up to zone 1 and zone 21 T4 Low noise emission High vol. efficiency Good suction performance Gerotor principle Not susceptible to contamination BFP ATEX 2GD series gerotor motor/pump units are suitable for use in explosive zones 1 (gas) and 21 (dust) and temperature class 4.

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Why gerotor? Numerous applications in hydraulic and lubrication systems just require the circulation of the fluid. In such cases low noise emissions and low pressure ripples are more important than highly efficient transmission of energy. The gerotor is the ideal principle for such applications. The displacement mechanism consists of the inner and the outer rotor. The number of teeth of the inner rotor is always one less than the outer rotor. The rotation of the gerotor generates chambers of changing volumes between the inner and outer rotor. The variation follow a sinus curve, resulting in a...

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Ignition protection mark explanation Ex h r IIC |— T4 |- Gb Ex h - IIIB r- T125 °C - Db Equipment protection level max. surface temperature Temperature class Explosion class Type of ignition protection Atmosphere (G = Gas, D = Dust) Device category 2 = Zone 1 (Gas) / Zone 21 (Dust) 3 = Zone 2 (Gas) / Zone 22 (Dust) Equipment group Temperature class T4 ATEX mark Motor power Number of motor contacts Pump output per litre If a bypass is desired, the information is added to the to the type designation: BFP 8-4-0.75kW-Atex-T4-BPx Bypass version BP Technical data Technical Data Pump housing: Anodised...

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BFP ATEX-2GD Pump selection information: When selecting the pump model, choose the motor output according to the oil viscosity to be used. Motor output information refers to the maximum oil viscosity at maximum operating pressure. The BFP 8 to BFP 40 are also available as a special version with a 6 bar internal bypass valve for protection. This does not change the dimensions. Installation information: The pump head of all pumps can be mounted turned in 90° increments to align with the line routing. Please note the offset from the centre of the motor. The connection threads are manufactured to...

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