Once an air motion is established, a pressure drop is generated, as well as, when an electrical current is established, a voltage drop is generated. In other words, there is […]
Standardized guideline fans Position control engine belts Arrangements centrifugal fans Direct driven Arrangement Arrangement Arrangement 4 5 8 The turbine is directly assembled onthe driving shaft end. Engine is posedon […]
Direct Driven Arrangement4 Arrangement5 Arrangement8 The impeller is mounted directly on the motor shaft Motor is placed on a support chair The impeller is mounted directly on the motorshaft. Motor […]
Density The fans curves are generally illustrated with a density equal to 1.2 kg/m³, this value is set for the air at 20°C and at the see level.Therefore it is […]
Amazing experiment! As a child, all of us, we once discovered the surging phenomenon! The pressure, generated by our lungs blowing into a balloon, shows sometimes the difficulties to overcome […]
It happens that some industrial process avid of pressure, requires to place two fans in series. This arrangement might be used either because the pressure is high and the material […]
1+1 do not always equal 2 When a process requests to operate several working points, it is used to design the system on 2 fans with parallel arrangement. We can […]
Do not excite the fans! They can go wild…! We often believe that to equip a fan with anti-vibration pads is the best thing to do. However, it is a […]
The variable speed drives are increasingly used for fan operations. The advantages of a VSD are: The electrical motor sizing for a fan with variable speed is classical. However, it […]
The centrifugal fan’s impeller may have sometimes an important inertia, if we relate it to the power motor in charge to drive it. N.B.: We know that the motor power […]
The fan is the origin and siege of vibrations, because of the rotating part (impeller). For example, based on the formula F = m.w².r, an unbalance of 20 gr located […]
Often we are requested to know what will be the pressure loss caused by a fan stopping to operate, after an electrical or mechanical breakdown, in order to size sufficiently […]
Introduction The mechanical design of a fan is surely depending on economic matters leading to steel and thickness choices, with a design including the less possible manufacturing hours, in order […]
The use of a frequency inverter with asynchronous low-voltage 230/400/690V motors requires an adapted setting of the inverter. Terms of use for a motor with a tension of 400V For […]
The static load of the fan consists in its own weight in N (Newton).However the fan is a rotating machine not perfectly balanced, even when it is new. Furthermore, during […]
The thermic applications involving fans are present in several areas of the industry, and the OEMs integrating fans in their own machines are going from the boilers manufacturer, burners, oven […]
Single voltage 3 Terminals Dual voltage 6 Terminal Connection Y,∆ 2 speed motor DALHANDER or PAM 2 speed motor 2 separate windings
One of the hot topics in the media is often the energy saving, becoming one of the most important matters for the mankind and our planet. While several industrial major […]
In a previous article, we wrote about the Aeraulic precautions and controls to execute a new fan start-up. Concerning the rotating machines, we have also to ensure a right mechanical […]
During new fan installation and after mechanical check (please see our maintenance and user manual), it is necessary to ensure few “Aeraulicprecautions” at commissioning. 1. Precautions for starting a fan […]
Mass flow and volume flow According the routing sheet, the flow to be realized by the fan is given in volume flow (m³/h) or in mass flow(kg/h).The fans is a […]
The use of different pressure units might be confusing. This is why we suggest you a chart with the existing conversion factors. UnitésPression 1 Pa =1N/m² mmce mbar bar In […]
When doing welding operation on existing fan, it is essential to place a grounding clip the nearest possible to the welding zone. Indeed, without this precaution, the welding current tries […]
The noise of the fansjhgjhg (magnificent sound boxes) is due to several causes. Aeraulic reasons are often more impacting than mechanical ones. Aeraulic noise origin. Noise is due to the […]
In order to ensure sufficient ventilation in a room, production hall, warehouse or room, we should calculate the air volume to be extracted. According the activity type inside the room, […]
When a fan manufacturer answer to a price request for which the requested flow and pressure are important, or when the fans has to be designed according a technical specification […]
Inlet Vane Control description The Inlet Vane Control is a regulation device to set up a desired working point of the fan. It is installed straight ahead on the suction […]
The fans often operate at partial flow. For example, on centralized dust suppression, it is not necessary to extract dusty air on non-occupied workstations. To limit the flow of the […]
Statistics performed by manufacturers are showing that early malfunctions are essentially due to the following reasons: The bearings installed on the industrial fans are operating often at high speed and […]
Energy is also a main concern in the industry. Here under we define some solutions in order not to waste energy. 1. EXPECTED PER PORMANCES It starts with a good […]
