Murzello Metal Finish Systems Private Limited

Airless Blast systems are possible with the help of turbine wheels. These wheels are in sizes of 200 Ø, 300 Ø, 400 Ø & 500 Ø and are driven by electric motors from 5 hp to 60 hp and from 3200 RPM to 2440 RPM. Abrasive throwing capacity varies from 90 kgs/min to 600 kgs/min.

Airless blast systems are popular, economical and high production machines for the various industries from casting, forgings, pipes, structural & plates to railway wagons & freight containers.

Here the abrasive is fed from a pressurised vessel to the blast hose through a metering valve. The metered abrasive alongwith pressurised air is projected at high velocities through a nozzle to clean the surface to the desired finish.

Air blast equipment is used world wide in a variety of application from offshore marine, general and civil engineering industrial blast rooms, to stone and masonary cleaning and glass etching.

Medium to high pressure, small to medium and large volumes of paint can be sprayed by Airless and Airless Plus systems. These are also available for water based coatings, & also suitable for High Viscosity Material. Also available - Electrostatic High Rotation Systems, Speed Bell 400 Spray System

Clean, Quick, Economical - HVLP Systems available for normal painting and electrostatic painting application.

PRINCIPLE OF OPERATION-AIR RECIRCULATION OVENS
The heat exchanger is located within the oven carcase, normally at high level, adjacent to the recirculating fan. The fan forces air from the heat exchanger down through the in-built side ducts and discharges into the hot zone of the oven. This air then rises and is collected at high level by a return air duct system which passes the air back to the heat exchanger and the recirculating fan.

OVEN CONSTRUCTION
The oven is designed to be free standing and is normally delivered completely assembled.

A fully welded fram forms the basis of the unit with soft tape seals attached to ensure air tightness with the external insulated panels.  

OVEN TOP
In the top of the oven; the fan, heat exchanger, natural vent stack and air replacement louvre are fitted to the internal frame.

Unless otherwise specified, the natural vent stack terminates with a suitable size blast gate. Interconnecting ductwork for external venting is not included.

DOORS
For both Box and conveyorised Ovens, the doors are sized to customer requirements.

SILHOUETTES
Silhouettes are provided for Conveyorised Ovens for the entrance and exit of components. Powered heat seals are offered as an option to minimise heat loss.

CIRCULATING FAN 
A circulating fan, normally located at high level, is incorporated within the oven carcase and is designed to deliver a specific air volume. The fan unit is a plug type, passing through the insulated body of the oven and has the drive externally in free air; the impeller and fan casing being inside. The complete unit can be removed easily for maintenance.

AIR CIRCULATION 
Within the oven, a series of ducts are provided to distribute the air to the working hot zone. Special provision is made to ensure the correct temperature is achieved and maintained with the inlet ports for recirculating air arranged in the side walls.