Claw Pumps (Pressure)
Manufactured in Italy
DVP claw pressure pumps are designed and manufactured in Italy for industrial applications requiring clean, reliable and efficient positive-pressure airflow.
Official UK & Ireland Master Agent
Vacuum Pumps UK is the Official DVP Technology Master Agent for the UK and Ireland, providing factory-backed technical advice, genuine parts and after-sales support.
OEM Spare Parts
We supply genuine DVP filters, gaskets, service components and DVP spare parts to support claw compressors throughout their working life.
Speak to a Claw Compressor Specialist
Unsure which claw pressure pump is suitable for your application? Vacuum Pumps UK can advise on airflow, required pressure, operating duty, pipework resistance, inlet conditions and the most appropriate DVP VA model.
Contact Our SpecialistsDry Claw Pressure Pumps and Compressors
DVP claw pressure pumps provide clean, oil-free positive-pressure airflow for demanding industrial and environmental processes. They are particularly suitable where dependable continuous operation, efficient performance and reduced routine maintenance are important.
Unlike dry-running rotary-vane compressors, claw pumps do not contain carbon vanes. The pumping chamber uses two synchronised claw-shaped rotors that rotate without touching one another.
Because there is no contact between the rotating claws and no oil inside the compression chamber, internal friction and component wear are reduced while the delivered air remains free from process oil introduced by the pump.
How a Claw Compressor Works
Two claw-shaped rotors turn in opposite directions inside a precisely formed compression chamber. Their movement draws air through the inlet, traps it between the rotors and chamber wall and transfers it towards the pressure outlet.
The shape and timing of the rotors reduce the available chamber volume as the air moves towards the outlet, creating positive pressure before the compressed air is discharged.
The rotors are synchronised by precision gears. These gears and their bearings are lubricated within separate compartments, isolated from the dry compression chamber by seals and gaskets.
DVP VA Claw Compressor Range
The DVP VA range offers different motor and pressure configurations, allowing the pump to be selected according to the required airflow and operating pressure.
DVP VA 155
Nominal capacity of 155 m³/h at 50 Hz, with maximum overpressure up to 1.2 bar.
DVP VA 155-1
Nominal capacity of 155 m³/h at 50 Hz, with maximum overpressure up to 2 bar.
DVP VA 315
Nominal capacity of 250 m³/h at 50 Hz, with maximum overpressure up to 0.6 bar.
DVP VA 315-1
Nominal capacity of 250 m³/h at 50 Hz, with maximum overpressure up to 1 bar.
Standard VA Series Equipment
• Adjustable inlet connection
• Pressure-relief valve at the outlet
• Anti-vibration shock mounts
Typical Claw Compressor Applications
DVP VA claw compressors are used where a sustained supply of clean positive-pressure air is required at a pressure within the operating range of the selected model.
Water Aeration
Pressure airflow can be supplied to diffusers and aeration equipment used to introduce oxygen into water and treatment processes.
Soil Remediation
Claw compressors can provide controlled airflow for environmental systems used in soil treatment and remediation projects.
Pressure Conveying
Positive-pressure airflow can be used to move suitable powders, granules or other bulk materials through properly designed pneumatic conveying pipework.
Selecting the Correct Pressure and Airflow
The largest nominal-capacity pump is not automatically the correct selection. The compressor must provide the required airflow at the actual operating pressure of the complete installation.
Pipe diameter, pipe length, bends, valves, filters, diffusers, conveying equipment and other restrictions can all influence system pressure and delivered airflow.
• Required airflow
• Normal working pressure
• Peak pressure requirement
• Operating hours and duty cycle
• Pipework length and diameter
• System resistance and pressure loss
• Inlet-air quality
• Ambient temperature and ventilation
• Future capacity requirements
Protecting the Claw Compressor
Although the claw rotors do not touch, unsuitable contamination entering the compression chamber can still affect clearances, seals, operating temperature and long-term reliability.
The compressor should receive clean inlet air and must be correctly protected where airborne dust, particles, moisture or process contamination may be present.
View Pump and Compressor Accessories →Why DVP?
DVP Technology manufactures dry claw pumps for both vacuum and positive-pressure applications, supported by more than 50 years of vacuum and compressor engineering.
The VA range combines Italian manufacture, dry contactless compression and support from the Official DVP Master Agent for the UK and Ireland.
Choosing the Correct Model
The VA 155 and VA 315 models offer different combinations of airflow, motor power and maximum overpressure.
Vacuum Pumps UK can review your system requirements and help identify the configuration best suited to the required operating point.
Parts, Service & Repairs
Our factory-trained engineers work with DVP in Italy to provide technical assistance, genuine parts and after-sales support for DVP claw compressors.
We can also assist with servicing, fault investigation, replacement pumps and upgrades to existing pressure installations.
Frequently Asked Questions
What is a claw pressure pump?
A claw pressure pump is a dry compressor that uses two synchronised, contact-free claw-shaped rotors to draw in air, compress it and discharge it at positive pressure.
Does a claw compressor use oil?
No oil is used inside the compression chamber. Oil is used to lubricate the synchronising gears and bearings, but these are housed in separate compartments isolated from the airflow.
What pressure can a DVP claw compressor produce?
Maximum overpressure varies by model. The DVP VA range covers maximum figures from 0.6 bar to 2 bar at 50 Hz, depending on the selected pump and motor configuration.
What are claw pressure pumps used for?
DVP identifies water aeration, soil remediation and pressure pneumatic-conveying systems as the principal applications for the VA claw-compressor range.
Are claw compressors suitable for continuous operation?
They are designed for demanding industrial operation, provided the compressor is correctly sized, installed, ventilated and operated within the permitted pressure and temperature limits.
What is the difference between a claw compressor and a rotary-vane compressor?
A dry rotary-vane compressor uses wearing carbon vanes that contact the compression chamber. A claw compressor uses two synchronised rotors that operate without touching, so there are no carbon vanes inside the compression chamber.
Can Vacuum Pumps UK replace another claw compressor brand?
Yes. Send us the existing compressor model, nameplate information, required airflow, operating pressure and application details. We can compare these requirements with the DVP VA range.
Need Help with a Claw Pressure Pump?
Speak to our specialists for advice on DVP VA claw compressors, replacement pumps, pressure and airflow calculations, genuine spare parts, servicing and technical support.
