DANFOS Oil seperator Type OUB For Air conditioning
AKS 3000 is a series of absolute transmitters with high-level signal conditioned current output, developed to meet demands in A/C and refrigeration applications. AKS 3000 utilizes the proved piezoresistive measuring principle, which has been used for decades in Danfos pressure transmitters.
The pressure reference is a sealed gauge. This means that atmospheric pressure variations have no in€uence on regulating accuracy. A must in accurate low pressure regulation.
All materials in contact with the refrigerant and materials for the housing are AISI 316L stainless steel. No soft gaskets, all environmental sealings are made through laser weldings only.
AKS 3000 has a 4 - 20 mA output, and is available with spade terminals for EN 175301-803 plug.
Features :
Tough environment :
• Vibration
• Shock during operation and transport
• Humidity and ice formation
• Temperature variations
• Corrosive media like ammonia gases and salt mist
Convenient performance:
• 4 - 20 mA signal
• 1% typical accuracy
• 0.5% typical linearity
• Prepared for high pressure refrigerants Bar code for tracing of calibration data
Convenient performance:
• Compact design
• Max. working pressure 33 bar
The very effective function of the OUB is due to the interaction of the following:
• velocity and change of flow direction of the incoming mixture of oil and refrigerant
• oil concentration, separation, and filtration
• storage of separated oil at high temperatures, thus preventing absorption of the refrigerant. Refrigerant vapour is led through the inlet connection (12). The oil contained in the vapour is separated as a result of the change in velocity and direction through the oil concentrator (15) which at the same time also acts as an oil filter.
When the superheated refrigerant vapour flows around the oil container (2) some of the superheat is given o…. In this way the oil container reaches a constant high temperature and the separated oil is stored in a warm state, i.e. with as low a refrigerant content as possible. Thus, the refrigerant is prevented from flowing to the crankcase where it could cause violent boiling.
The float (1) opens the needle valve (3) depending on the amount of oil, whereupon the condensing pressure forces the oil back to the crankcase therefore ensuring automatic oil return.
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