RDX Compressed Air Refrigerated Air Dryer, Max. 16 bar operating pressure, flow rate 0.4–1.8 m³/min
The Comprag RDX refrigerated air dryers reliably deliver dry compressed air with a constant pressure dew point of +3 °C. They protect machines and tools from corrosion and condensate. Thanks to their compact design, they can be easily integrated into existing systems. Low-maintenance aluminum heat exchangers and a hot gas bypass ensure efficient operation. Suitable for workshops, trades, and industry at flow rates of 0.4–1.8 m³/min.
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RDX Compressed Air Refrigerated Air Dryer, Max. 16 bar operating pressure, flow rate 0.4–1.8 m³/min - 0.4 is in stock and will be shipped as soon as it is available again
Questions & Help
Questions & Help
Do you have questions about one of our products, or would you like expert advice on selecting the right solution for your application?
No problem—give us a call! Tel. +49 (0) 2551 5030
Send us an email! shop@strahltechnik-express.de
Use our online chat or the contact form
Leasing & Rent-to-Own
Leasing & Rent-to-Own
We offer leasing and rent-to-own financing options exclusively to business owners, tradespeople, and the self-employed for selected products with a net merchandise value of €1,000 or more. Below you will find the key differences between these two financing options.
Leasing
In a lease, the product is made available to the lessee for use in exchange for regular lease payments. The lessor is responsible for accounting for the lease. The lease payments can generally be claimed as business expenses for tax purposes. These are gross payments, and value-added tax is charged throughout the entire term. At the end of the agreed-upon basic lease term, it is generally possible to purchase the product.
Hire Purchase
Hire purchase is economically equivalent to installment purchase. The product is capitalized on the hire purchaser’s balance sheet and depreciated in accordance with the official depreciation tables. Upon payment of the final hire purchase installment, ownership of the item is transferred to the hire purchaser. Value-added tax must be paid in full with the first hire purchase installment (transitory item).
Shipping & Delivery
Shipping & Delivery
Depending on the size, weight, and nature of our goods, they are shipped either via parcel service or freight carrier. We select the shipping method at our reasonable discretion.
The delivery times listed in the online store are non-binding estimates, unless a binding delivery date has been expressly confirmed in writing. They are based on the information available from our manufacturers, suppliers, and logistics partners at the time the order is placed.
Most of the products offered are shipped directly from the manufacturer or from external central warehouses (direct shipping). As a result, delivery times may differ from the estimated times provided. Delivery delays may occur, particularly in the event of material shortages, production delays, supply bottlenecks, force majeure, or other circumstances beyond our control.
Disclaimer:
We assume no liability for delivery delays resulting from circumstances beyond our control. This applies in particular to delays caused by manufacturers, suppliers, shipping companies, or other third parties. Liability for any resulting damages—in particular for indirect damages, consequential damages, or lost profits—is excluded to the extent permitted by law.
Partial deliveries are permitted, provided they are reasonable for the customer. This does not result in additional shipping costs, unless otherwise agreed.
The exact delivery time for an item can be provided on an individual basis upon request, either before or after the order is placed.
Please contact us by phone at +49 (0)2551 5030 or by email at shipping@strahltechnik-express.de.
In the event of significant delivery delays, we will inform the customer immediately. The customer’s mandatory statutory rights remain unaffected by this.
RDX Compressed Air Refrigerated Air Dryer, Max. 16 bar operating pressure, flow rate 0.4–1.8 m³/min - 0.4 is in stock and will be shipped as soon as it is available again
Comprag RDX – Reliable refrigerated air dryers for dry compressed air
The Comprag RDX Series refrigerated air dryers are high-quality components for the effective drying of compressed air. They reliably reduce humidity to a pressure dew point of max. +3°C, thereby protecting tools, machines, and products from corrosion, moisture buildup, and quality losses. The RDX‑04, RDX‑06, RDX‑09, RDX‑12, and RDX‑18 models are ideal for use in workshops, trade, and industry with flow rates ranging from 0.4 to 1.8 m³/min.
✅ Highlights
- Constant dew point of +3°C for reliable drying
- High-Performance, Low-Maintenance Aluminum Heat Exchangers
- Compact design – easily integrated into existing systems
- Environmentally friendly refrigerants (R134a or R513a)
- Very low pressure drop thanks to the integrated coalescing separator
- Ideal for use with Comprag F Series rotary screw compressors
🔧 Technical Specifications
* Measured according to ISO 7183: operating pressure 7 bar, ambient temperature +25 °C, inlet temperature +35 °C.
** Depending on the year of manufacture—see nameplate.
📏 Dimensions and Weight

📐 Adjusting the flow rate to operating conditions
Here we offer you a handy calculator for adjusting the air flow rate to your specific operating conditions.
The rated capacities of our compressed-air dryers are based on standard conditions in accordance with DIN ISO 7183 (7 bar, 35 °C inlet temperature, 25 °C ambient temperature).
Since actual systems often have varying values, you can use this tool to quickly and easily determine the correct dryer air flow rate. To do so, enter the air flow rate of your compressor as well as the corresponding correction factors (F1, F2, F3)—the calculator will display the required dryer air flow rate in m³/min and l/min.
⚙️ Equipment
- LED indicator for operation and errors
- Color-Coded Dew Point Display
- Hot gas bypass control to prevent icing
- Time-controlled condensate drain with delayed discharge
- Coalescing separator (demister) integrated into the heat exchanger
- Ready for connection with standard threaded connections
🏭 Typical Applications
- Compressor systems with continuous air demand
- Abrasive Blasting Technology, Painting, and Powder Coating Facilities
- Pneumatic Tools and Machinery
- Production facilities with increased demands on compressed-air quality
- Protecting sensitive equipment from condensation, rust, and malfunctions
🔄 Suggested additions
- Desiccant air dryers: For exceptionally dry air (down to a dew point of –40°C)
- Activated Carbon Adsorber: For removing oil vapors and odors
- Fine and Microfilters: For Particle Separation
- Air receivers: e.g., 270 L or 500 L for pressure stabilization
- Maintenance kits: With filter cartridges, O-rings, and gaskets
❓ FAQ – Frequently Asked Questions About the RDX Series
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1. Which refrigerated air dryer is compatible with my compressor?
The selection depends on your compressor’s flow rate. Example: RDX‑04 for up to 0.4 m³/min, RDX‑18 for up to 1.8 m³/min. -
2. What does the hot gas bypass control do?
It ensures smooth operation at partial load and prevents the evaporator from freezing. -
3. How often does the dryer need to be serviced?
We recommend a weekly visual inspection and a complete service once a year—e.g., replacing the condensate drain and cleaning the heat exchanger. -
4. Can I connect the dryer directly?
Yes—the RDX models are ready to plug in and only require a 230 V power connection. -
5. How do I know if everything is running smoothly?
The LED status indicator provides information on operating and fault conditions. In addition, a color display shows the current dew point status.
Payment & Security
Payment Methods
Your payment information is processed securely. We do not store credit card information and do not have access to your credit card details.
In addition, we offer many other payment methods at checkout via mollie!


