Pneumatic systems & components


Liquid drainers for air and gas systems

Fourth Quarter 2007 Pneumatic systems & components

The Spirax Sarco liquid drainer is the product of many years of experience; constant design improvements have made today's liquid drainer range extremely robust and ideally suited to the rigorous demands of any air or gas system. The ball float type liquid drainer (CA) is unique amongst all ball float liquid drainers as the self-aligning main valve assembly is resistant to water hammer. Such attention to detail ensures complete shut-off at all pressures and reliable operation providing extended product life and requiring minimal maintenance.

The Spirax Sarco ball float liquid drainer range is adaptable to all applications where ball float liquid drainers are recommended and instantaneous removal of condensate is required.

Principle of operation

On start-up, the balance line allows air or gas to pass through the body and back into the inlet. This would otherwise not be able to escape (a condition known as 'air/gas binding').

As soon as condensate reaches the drainer, the float rises and the lever mechanism opens the main valve. Condensate continues to flow through the main valve. When air or gas arrives, the float drops and closes the main valve. At all times, the main valve remains below the water level, which ensures that air or gas cannot be passed.

Ball float liquid drainers are the first choice for drainer applications. They are able to handle heavy or light condensate loads equally well and are not disturbed by wide and sudden fluctuations of pressures. Although compact in size, their discharge capacity is high and continuous. They are the best choice for draining both batch and continuous process plant. On all applications condensate is removed as soon as it is formed.

Applications can be found in abundance eg, most facilities use compressed air, and on chemical plant there are many gases like H2, N2, CO2, C3 and C4 that may need drainage points. Vapour phase heat transfer oils also require to be trapped in the same manner as steam lines.

For more information contact Bobbie Brooke-Taylor, Spirax Sarco, +27 (0)11 230 1300, [email protected], www.spiraxsarco.com



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