Screw compressors D-series

The pulse of your industry. Maximum efficiency. Absolute protection.

In modern production, downtime is not an option. Comprag screw compressors are the reliable engine that supplies your processes with the purest, most dependable compressed air. We combine engineering precision with future-proof efficiency to not only generate compressed air, but also redefine your energy costs.

We know that true performance is reflected in longevity. That's why every Comprag D-Series direct-drive compressor is built for uninterrupted 24/7 continuous operation.

• The efficiency turbo: Save up to 25% energy with our VSD models (FV, DV) by continuously adjusting the power output to your actual needs.
• Investment security: Thanks to our low-vibration, service-friendly design and the use of high-quality components, we significantly extend the service life of your system and reduce the total cost. Total Cost of Ownership (TCO).
• Sustainable power: Optionally reuse up to 94% of the released heat - convert waste heat into heating energy and actively improve your environmental footprint.

Trust Comprag. Trust compressed air that will never let you down.

The Comprag D-Series: Direct drive. Permanently reliable.

The Comprag D-Series embodies the new generation of screw compressors. Through the consistent use of the low-loss and low-wear 1:1 direct drive, we guarantee maximum efficiency and operational reliability.

Application and your benefits: Why a Comprag D-series screw compressor?

Reliable performance - Continuous 24/7 operational reliability

A Comprag D-series compressor guarantees uninterrupted production. Our machines are specifically designed for demanding 24/7 continuous operation in challenging industrial environments. Direct power transmission without belts eliminates one of the most common causes of breakdowns. Rely on technology that minimizes downtime and ensures the availability of your compressed air at all times.

Space-saving

Do you need compressed air in a space-saving environment? The Comprag D-Series is the turnkey solution. Minimal installation time, maximum performance.

D-series screw compressors produce industrially compressed air up to class 4-4-4 according to ISO 8573-1:2010. Features of D-series compressors: Professional control system (A), reliable electric motor (B), screw block (C), oil separator tank (D) and control valves (E) manufactured in-house.

Benefit from heat recovery

Utilize the waste heat from your Comprag screw compressor as a free energy source. Up to 94% of the supplied electrical energy can be recovered through optional heat recovery systems - ideal for heating your premises or for hot water processes. An active contribution to reducing your energy costs and improving your CO₂ balance.

Features and technology: The heart of every Comprag D compressor

The most efficient drive concept: The 1:1 direct drive

The 1:1 direct drive is the unique selling point of the D-Series and the key to its outstanding economy.

• Maximum efficiency: Lossless transmission eliminates slippage losses.
• Minimal wear: The system does not require belts or clutches, which drastically reduces maintenance and wear.
• Long service life: Reduced mechanical stress and vibrations guarantee an exceptionally long service life for the entire compressor.

The durable Comprag screw block

At its core is our specially developed screw block with rotor design . It is designed for contactless rotation and maximum mechanical efficiency. Precise oil injection seals, lubricates, and dissipates process heat, maximizing the service life of the entire Comprag screw compressor and extending maintenance intervals.

Intelligent control

The professional control system monitors your Comprag screw compressor fully automatically. The system provides you with all relevant data (pressure, temperature, maintenance intervals) in real time, optimizes the load/idle cycle, and can be easily integrated into higher-level building management systems to continuously increase process reliability.

Excellent ease of maintenance

Thanks to the well-thought-out, service-oriented design of the D-Series, all maintenance components such as filters and oil separators are optimally and easily accessible. This concept reduces downtime to a minimum and actively contributes to keeping the total cost of ownership (TCO) of your Comprag compressor low.

This is how your Comprag screw compressor generates compressed air

The detailed compression process of your Comprag screw compressor

A screw compressor operates on the principle of continuous compression and is designed for continuous operation. The core component of every Comprag screw compressor is the screw block with two counter-rotating, interlocking rotors (a main shaft and a counter shaft).

The Comprag screw compressor generates compressed air through a continuous, multi-stage process, driven by the electric motor (2) via direct drive (9) in the D/DV series.

1. Intake and compression: Ambient air is cleaned by the air filter (4) and enters the screw block (1) via the air intake valve (3). Here, the air is continuously compressed by means of the rotor pair .
2. Oil injection and mixture formation: Simultaneously, oil (orange) is injected into the compression chamber. The oil lubricates, seals, and dissipates the intense heat generated during compression. A hot air-oil mixture (orange/blue) is formed .
3. Separation of the mixture: The air-oil mixture flows into the air-oil separator tank (5) where most of the oil is separated.
4. Cleaning and cooling: The pre-cleaned air passes through the air-oil separator (7) for fine separation (for a residual oil content of a maximum of 3 mg/m³). Both the hot, clean compressed air (blue) and the separated oil are then cooled via the heat exchanger (8) . The fan (10) provides the necessary cooling air . The cooled oil is cleaned via the oil filter (6) and is ready for injection again.
5. Output: The cooled, clean compressed air (blue) leaves the Comprag screw compressor for your application.

This design guarantees a constant flow of compressed air - ideal for industrial applications.