RDP Condensing Compressed Air Dryers

Kondenzační sušičky stlačeného vzduchu od kompresoru RDP

condensation dryers for removing moisture from compressed air
electronic control unit with dew point display, alarm setting, etc.
integrated lossless electronic condensate drain EMD12 with self-cleaning directly controlled valve
switching on/off via button next to the control unit
pressure dew point +3 °C; modern environmentally friendly refrigerant R134a
working pressure 14 bar, operating temperature in the installation room +1.5 °C to +45 °C, maximum medium temperature +55 °C
reference measurement conditions: ambient temperature +25 °C, medium temperature +35 °C, working pressure 7 bar, dew point +3 °C
note: for conditions other than the reference, a correction factor must be used for the calculation - please contact our company

RDP Condensing Compressor Dryers by Omega Air
Ordering number	Outbound conduit	Flow		Pressure Bar	Voltage V/Hz	Power consumption	Connection "	Dimensions mm			Weight kg
Ordering number	Outbound conduit	m³/h	l/min	Pressure Bar	Voltage V/Hz	kW	Connection "	d	with	in	Weight kg
RDP-20	RDP-20-BP	20	333	14	230/50	0,135	G 3/8"	352	485	499	25
RDP-35	RDP-20-BP	35	583	14	230/50	0,135	G 3/8"	352	485	499	25
RDP-50	RDP-50-BP	50	833	14	230/50	0,180	G 3/4"	352	485	499	26
RDP-75		75	1 250	14	230/50	0,250	G 3/4"	352	485	499	27
RDP-100		100	1 666	14	230/50	0,320	G 3/4"	352	485	499	32
RDP-140	RDP-140-BP	140	2 333	14	230/50	0,480	G 1"	357	552	684	50
RDP-180		180	3 000	14	230/50	0,500	G 1"	357	552	684	52
RDP-235		235	3 916	14	230/50	0,700	G 1"	357	552	684	56
RDP-300	RDP-300-BP	300	5 000	14	230/50	0,900	G 1 1/4"	496	589	827	84
RDP-380	RDP-300-BP	380	6 333	14	230/50	1,080	G 1 1/4"	496	589	827	90
RDP-480	RDP-480-BP	480	8 000	14	230/50	1,200	G 1 1/2"	<496	589	827	99
RDP-600	RDP-600-BP	600	10 000	14	230/50	1,250	G 2"	491	710	973	109
RDP-750		750	12 500	14	400/50	1,600	G 2"	491	710	973	120
RDP-950		950	15 833	14	400/50	2,100	G 2"	491	710	973	150
RDP-1150	-	1 150	19 166	14	400/50	2,200	G 2 1/2"	663	856	1 534	250
RDP-1300	-	1 300	21 666	14	400/50	2,600	G 2 1/2"	663	856	1 534	280
RDP-1500	-	1 500	25 000	14	400/50	2,700	G 2 1/2"	663	856	1 534	290
RDP-1900	-	1 900	31 666	14	400/50	4,000	G 2 1/2"	663	856	1 534	310
Reference flow measurement conditions: ambient temperature +25 °C, medium temperature +35 °C, working pressure 7 bar, dew point +3 °C ± 1 °C.

Correction factor - Working pressure										DEW POINT - CORRECTION FACTOR
Working pressure bar	4	5	6	7	8	10	12	13	14	Temperature °C	3	5	7	10
Correction factor	0,77	0,86	0,93	1,00	1,05	1,14	1,21	1,24	1,27	Correction factor	1,00	1,099	1,209	1,385
INLET TEMPERATURE - CORRECTION FACTOR										AMBIENT TEMPERATURE - CORRECTION FACTOR
Temperature °C	≤25	30	35	40	45	50	55			Temperature °C	≤25	30	35	40
Correction factor	1,20	1,12	1,00	0,83	0,69	0,59	0,50			Correction factor	1,00	0,96	0,90	0,82

#ShowMore#

Basic principles

Compressed air contains impurities such as water, oil and particulates that must be removed or reduced to acceptable levels based on the specific requirements of the application.

ISO 8573-1 specifies the air purity/quality class for these contaminants. Humidity (water vapour content) is expressed in terms of pressure dew point (PDP), where dew point is the temperature at which the air is 100% saturated with moisture.

When the air temperature drops to or below the dew point, condensation occurs. Reduction of the water content to a dew point of +3 °C is usually achieved by using a condensation dryer.

Performance

The RDP/RDT condensation dryers are designed to efficiently separate water from compressed air and reduce the dew point down to +3 °C.

The drying process takes place on the principle of cooling inside a highly efficient and compact three-stage heat exchanger module. In the first stage (air/air exchanger), the hot and humid inlet air is pre-cooled by the cold outlet air. In the second stage (air/refrigerant evaporator), intensive condensation of water occurs due to air cooling.

In the third stage, all condensed water is separated from the main compressed air stream by an integrated demister. The proven robust design offers efficient and reliable operation, quick installation and easy maintenance.

Control unit	Electronic drainer	Pressure switch	Temperature switch

The control panel contains all the information necessary to manage the condensation dryer. The panel also includes a main on/off button and provides a dew point and alarm mode display.	The integrated electronic condensate drain EMD12 is designed for fully automatic condensate drainage without air loss. A special self-cleaning directly controlled valve ensures reliable operation. The condenser is equipped with an operating alarm, LED indicator, test button and capacitive condensate level sensor.	Pressure switches are control devices that are used as a safety feature. The refrigerant compressor is stopped by interrupting power to the compressor motor when the maximum allowable refrigerant pressure is exceeded to prevent damage to the equipment. The presence of a pressure switch depends on the size of the dryer.	The temperature switch monitors the output temperature of the refrigerant compressor. If the temperature is too high, it means that the compressor is overheated and the internal components may be damaged. Depending on the temperature, preventive actions are taken to interrupt the power supply to the compressor.

Funkční schéma kondenzační sušičky - RDP/RDT

Function

COMPRESSED AIR CIRCUIT

Warm and humid compressed air enters the three-stage heat exchanger module. In the first "air-to-air" stage (a), the supply air is pre-cooled by the cold discharge air. This phase is important both in terms of energy saving and stable operation of the whole system. In the second "air-refrigerant" stage (b), the air is cooled by a refrigerant. At this stage the water vapour condenses into liquid water. In the third stage, the "demister" (c) separates all liquid water from the main air stream. The cold dry air then re-enters the first stage (a) where it is heated by the hot inlet air. In addition to the energy saving function, this stage ensures that the dry air leaving the dryer is warm enough to prevent condensation on the outside of the outlet ductwork. The condensed water is discharged from the system using an electronic condensate drain (RDP ) or a condensate drain timer (RDT).

REFRIGERANT CIRCUIT

Refrigerant circulation in the circuit is provided by a highly efficient hermetically sealed refrigerant compressor (4). The compressor increases the pressure of the gas, which is then cooled and liquefied in the condenser (5). The electric fan on the condenser can be controlled by a temperature or pressure sensor. The liquid refrigerant then passes through a capillary or thermostatic expansion

valve (8), which acts as a measuring device to reduce the refrigerant pressure. The pressure reduction is a design function to achieve the target temperature inside the evaporator (lower pressure = lower temperature). The refrigerant filter (7), which is installed upstream of the measuring device, traps impurities and ensures reliable operation of the system. The low-pressure refrigerant gas then re-enters the refrigerant compressor.

The dryers operate on a "non-cyclic" principle, which means that when the dryer is unloaded (e.g. no or low compressed air supply), the hot gas bypass valve (6) releases some of the hot gas from the refrigerant (at the compressor outlet) back to the compressor inlet. As a result, the evaporation pressure/temperature will be constant at the preset value.

In the event of a high outlet temperature, a "temperature switch" stops the refrigerant compressor to prevent permanent damage. Depending on the size of the dryer, additional safety/protection devices (e.g. low or high pressure switches) are installed in the refrigeration circuit.

Smaller dryers are equipped with a basic control unit that primarily monitors the dew point of the compressed air. Larger dryers are equipped with more powerful control units that offer advanced control and monitoring features.

Použité komponenty sušičky RDP a RDT