MNL-0408
June 11, 2009
Page 61
5.3.4
Condensate Drain Valve
A manually operated valve used for maintenance and before start-up to drain the condensed liquids
from the coalescing oil and water separator.
5.3.5
Check Valves
Valves allowing compressed air to flow in only one direction. One is used to maintain pressure in the
chamber when the compressor is not operating. The other check valve prevents back-flow from filled
storage cylinders or tanks.
5.3.6
Bleed Valve
A manually operated valve used to release the pressure in the chamber before maintenance.
5.3.7
Pressure Maintaining Valve
The pressure maintaining valve ensures that pressure is built up in the system from the start of delivery,
thus achieving constant optimum purification. It also assures proper working conditions for the final
stage of compression. The Pressure Maintaining Valve is preset at the factory. The nominal setting is
2,000 PSI.
5.3.8
Safety Valve
The safety valve is located on the coalescing oil and water separator and acts as the safety valve for the
final stage of the compressor.
5.3.9
Securus
®
Electronic Moisture Monitor System
The Securus
®
Electronic Moisture Monitor System is a factory installed option which warns the opera-
tor in advance of expiration of the life of the cartridges. The Securus
®
Indicator receives signals con-
cerning the condition of the drying agent inside the Securus
®
cartridge from the attached sensors and
supplies the appropriate control signals whenever the preset threshold values have been reached.
5.3.9.1
Securus
®
Cartridge
The Securus
®
Cartridge is packed with a catalyst which converts carbon monoxide to carbon dioxide,
activated carbon which absorbs oil vapors, molecular sieve which absorbs oil and water and the sensor
components of the Securus
®
Electronic Moisture Monitor System.
5.3.9.2
Securus
®
Indicator
The operating condition of the Securus
®
Electronic Moisture Monitor System is indicated by the color
and state of four LED’s on the front of the Securus
®
Indicator and is shown in the following table.
NOTICE
After applying power it will take about ½ second for the appropriate LED to illuminate.
During this time the status of the Securus
®
Electronic Moisture Monitor System is tested.