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Description
EMD HP is an electronically controlled condensed water drain, which is designed for use in
compressed air systems with pressure up to 50 bar. It discharges water trapped in the lowest
parts of compressed air installation out of the system. This water is a condensed water vapor
that is always present in the atmosphere. Because of laws of physics, some vapor always
condenses during compression of air.
The EMD HP consists of a water tank, valve assembly and electronics. The water tank should
be the lowest part of the compressed air system where condensed water collects. In the
tank, there is a water level sensor. This way, electronics could detect the tank is full. Then, it
operates the electromagnetic valve to discharge condensed water from compressed air
system. The bottom cover of water tank is designed as debris trap where solid parts are
intercepted. The bottom can be removed from EMD HP for cleaning.
In the condensed water leaving the EMD HP, there are still small particles of rust and
remains of compressor oil. Oil must be removed before the water is drained to sewage
system. To remove oil, water-oil separator WOS or WOSm device could be used.
Because of its construction, the EMD HP could be attached to the compressed air system
horizontally or vertically. Under the pressure vessel or under the refrigerator dryer, the
EMD HP is fixed horizontally whereas under filters, it is more convenient to fix it vertically.
The valve is operated by electronics. It opens the valve when a button on the electronics
cover is pressed or when water level in the tank reaches threshold. Occasionally, a timed
venting mode that combines water level triggered discharging and timed venting is desired.
By pressing the test button, we could see if EMD HP is operational. Besides, the test button
makes possible to discharge water that has collected in a system during maintenance
manually.
WOSm
