Voice Engineers Ltd.

Charkop, Mumbai, Maharashtra

Centrifugal blowers are more like centrifugal pumps than fans. The impeller is typically gear-driven and rotates as fast as 15, 000 rpm. In multi-stage blowers, air is accelerated as it passes through each impeller. In single-stage blower, air does not take many turns, and hence it is more efficient. Centrifugal blowers typically operate against pressures of 0.35 to 0.70 kg/cm2, but can achieve higher pressures. One characteristic is that airflow tends to drop drastically as system pressure increases, which can be a disadvantage in material conveying systems that depend on a steady air volume. Because of this, they are most often used in applications that are not prone to clogging. Specifications

• Capacity starting from :150 M3/hr / -1.50, 000 M3/hr
• The pressure range varies between :10 / -1500 mm Wg

Features

• Maximum efficiency
• Minimum conveying
• High performing
• Durable
• Compact design

Positive-displacement blowers have rotors, which "trap" air and push it through housing. Positive-displacement blowers provide a constant volume of air even if the system pressure varies. They are especially suitable for applications prone to clogging, since they can produce enough pressure - typically up to 1.25 kg/cm2 - to blow clogged materials free. They turn much slower than centrifugal blowers (e.g. 3, 600 rpm), and are often belt driven to facilitate speed changes. Specifications

• Output Power : 0.2 Kw To 7.5 Kw
• Max Flow : 530 M3/Hr (312 Cfm)
• Max Pressure : 570 Mbar (228 In H2o)
• Max Vacuum : 440mbar (174 In H2o)
• Stages : Single/Double Electrical
  • 220 Vac, 50 Hz, Single Phase
  • 440 Vac, 50 Hz, Three Phase

Features The Ring Blowers are suitable for all those applications requiring considerably higher pressure. Side Channel exhausters are used in all those applications requiring an operating vacuum higher than the one achievable by a fan, but not as to require the use of a vacuum pump. The rotating parts are not in contact with the casing. Therefore, no friction during operation and thus no internal lubrication is necessary. The other main features are:

• Higher pressure ratio
• 100% oil-free air
• Low noise level (65dba Normal, 85 dba Max.)
• 140% Overload protection
• 10% Voltage fluctuation tolerance
• Rated for continuous duty
• IP 54 Protection
• Class F insulation
• Pressure die casted body, impeller & rotar
• Low temperature rise
• No, vibration, and therefore complete
• Pulsation- free discharge
• Cooler running, double sealed NSK (Japan) bearings

Applications The Ring Blowers are suitable for very wide field of application some of them are:

• Pneumatic conveying of solids/liquids
• Vacuum transfer of components/sheets
• Blowing away debris/sucking away debris
• Sorting/counting of cards/envelopes/papers
• To suck debris/gases from clean rooms/enclosed spaces/tunnels/laboratories
• To agitate and aerate water in spa/whirlpool/swimming pool/fishing tanks/aqua culture tanks
• Furnace fuel burning
• Beverage bottling/labeling drying
• Medical/dental suction units

Operating Principle The Blower includes an impeller and a side channel formed with a semi-circular side wall, having an inlet and outlet. As the impeller rotates, the air between the impeller blades is radially and circumferentially accelerated and pushed into the side channel. Here it is further compressed and forced back towards the impeller blades where the air is further accelerated. As air is transported along a spiral path through the impeller and side channel, each impeller blade increases the compression and acceleration until the air reaches the point where the side channel is connected to the discharge flange, where it is discharged. This type of blower is also referred to by other names such as Regenerative blower, Ring Compressor, Side channel blower or Vortex Blower. The ring blower or exhauster increases the pressure of the aspirated gas by the creation, in the peripheral torodial channel, of a series of vortexes caused by the centrifugal thrust of the impeller. While the impeller is rotating, the vanes force the gas forward and, because of the centrifugal thrust, outwards, producing a helical motion. During this motion, the gas is recompressed repeatedly with a consequent linear pressure increase along the length of the channel. Applications and advantages Ring blowers are suitable for all those applications requiring considerably higher pressures than that which can be achieved using centrifugal fans. Side channel exhausters are used in all those applications requiring an operating vacuum higher than the one achievable by a fan, but not as high as to require the use of a vacuum pump. The rotating parts are not in contact with the casing. There is therefore no friction during operation and thus no internal lubrication is necessary. The gas moving through the machine therefore remains uncontaminated and completely oil-free. The Other Main Features Are

• Beautiful surface
• Easy installation
• Low noise level
• No vibration and therefore complete dynamic
• Pulsation free discharge
• Minimal maintenance
• Higher pressure ratios
• Cooler running bearings
• Longer grease life
• Simple maintenance
• 100% oil free air
• Suitable to environment protection
• Small dimension

Rotary Air Lock Valve are important components of pneumatic conveying systems. Rotary airlock is also known as rotary valve, rotary feeder or airlock feeder. The basic use of the rotary airlock valve is as an airlock or sealing pressurized systems against loss of air or gas while maintaining a flow of material between components with different pressure. We Manufacture Rotary Air Locks used for feeding materials under vacuum or pressure while sealing in air & gas. Principle of gravity is used for dropping the material in the container. This is done with the help a vane rotor. The rotor consists of a no of Vanes and is available in different diameters as per the requirement of the process. The rotary air lock consists of rotor with minimum clearance of 0.5mm between van tip & interior of body. This is done to ensure perfect air locking considering the wear & tear of the rotors are driven with the help of standard motor & gearboxes. Our Rotary Air Lock Valves have high filling efficiency due to effective inlet shape and close running clearances. Our Rotary Airlock valves have wide application in industry wherever dry free-flowing powders, granules, crystals, or pellets are used. Typical materials include: Chemicals, Dyes, minerals, grains, plastics, dust, fly ash, flour, gypsum, lime, coffee, cereals, pharmaceuticals, etc. Application Areas

• Silo Discharge : The rotary valve placed under the silo or dust collection system is used to control the bulk solid discharge.
• Dosage Control : By controlling the rotation speed of the airlock feeder, volumetric metering and dosing of granular solids is achieved.
• Pneumatic Transportation : The airlock mounted under a cyclone is used for discharging the cyclone. Rotary valves mounted under cyclones, silos or hoppers are used to feed the pneumatic conveying line.

Construction

• Carbon steel
• Stainless steel
• CI castings
• Pneumatic Conveying Systems
• Air Pollution Systems, Powder
• Conveying systems

We offer an innovative wide range of Bucket Elevators, used to carry bulk raw materials where continuous vertical lifting is required. Bucket Elevators are divided into two classifications namely Centrifugal Bucket Elevator and Continuous Bucket Elevator. The buckets are mounted on chain or Belt as per the requirement. Our Bucket Elevators are available in varying bucket sizes & shapes for meeting customized requirements. The buckets are mounted on either belt or chain to allow free flow of material at loading and discharge points. Most elevators are completely enclosed for controlling dust . A holdback device is provided to prevent the reversal of the bucket-line in case of power interruption. Take up arrangement is provided at the foot-shaft. Selection of bucket elevator and its components such as bucket, belt or chain, take up arrangements, etc., are of prime importance, and depend upon the capacity and the physical and chemical attributes of the material to be conveyed.