Oil-Free OEM Vacuum & Pressure Technology

Thomas Linear Diaphragm Pumps & Compressors

Quiet, efficient oil-free linear diaphragm pumps and compressors for OEM pressure and vacuum applications requiring clean air, compact design and long operating life.

Thomas linear pumps are used across medical, environmental, laboratory, aeration and industrial applications where low noise, low vibration and low power consumption are critical.

Thomas linear diaphragm vacuum pump and compressor
Oil-Free Clean Air & Vacuum
0.031–22 CFM Available Flow Range
Up to 10.87 PSI Pressure Capability
Very Low Noise Quiet OEM Operation
Linear Diaphragm Technology

Quiet, Oil-Free Pump Technology for OEM Equipment

Thomas linear diaphragm pumps and compressors provide clean, contaminant-free air for OEM applications requiring vacuum, pressure or both.

The technology is particularly well suited to applications requiring low sound and vibration, a sealed air path, high flow at relatively low pressure ratios, low electrical consumption and long product life.

A significant advantage of linear pump technology is the absence of many conventional wearing components. There are no brushes, piston rings, vanes or cup seals in the pumping mechanism, reducing friction and potential failure modes.

Thomas oil-free linear diaphragm pump
Linear Pump Advantages

Benefits of Thomas Linear Diaphragm Pumps

Linear diaphragm technology provides a simple, efficient pumping mechanism designed for quiet and dependable OEM operation.

O

Oil-Free Operation

No lubricating oil is required, helping provide clean, contaminant-free air for pressure and vacuum applications.

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Very Low Noise

Linear electromagnetic operation is ideal for equipment where acoustic performance is important.

V

Low Vibration

Smooth linear movement helps minimize vibration transferred into the surrounding OEM equipment.

E

High Efficiency

Efficient electromagnetic drive technology helps minimize electrical power requirements.

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Sealed Air Path

Diaphragm separation provides a clean and controlled air path for sensitive OEM applications.

L

Long Operating Life

Fewer conventional wearing components can mean fewer failure modes and long equipment service life.

Thomas Linear Pump Range

Vibrating Armature & Linear Magnetic Pump Technologies

Thomas provides multiple linear pump platforms for pressure and vacuum operation across a wide range of OEM flow requirements.

Vibrating Armature Linear Pumps

Compact vibrating-armature pumps are available with AC or DC drive and can be configured for either pressure or vacuum service.

0.031 CFM Minimum Open Flow
0.300 CFM Maximum Open Flow
700 mbar Maximum Pressure
550 mbar Maximum Vacuum

Linear Magnetic Pumps & Compressors

Larger linear magnetic pump platforms provide substantially higher airflow while retaining the quiet, efficient operating characteristics of linear diaphragm technology.

0.052 CFM Minimum Open Flow
22.07 CFM Maximum Open Flow
450 mbar Maximum Pressure
300 mbar Maximum Vacuum
OEM Applications

Where Thomas Linear Pumps & Compressors Are Used

Thomas linear technology is used where quiet operation, efficiency and long life are essential to the finished equipment.

Hospital Beds & Air Mattresses Quiet continuous airflow for patient support and medical mattress systems.
Air & Gas Samplers Controlled gas movement for environmental and analytical equipment.
Compression Therapy Compact pressure generation for therapeutic medical devices.
De-Soldering Equipment Compact vacuum generation for electronic assembly and repair equipment.
Aquaculture & Pond Aeration Efficient continuous airflow for oxygenation and water treatment.
Sewage Aeration Continuous air supply for wastewater and greywater treatment processes.
How a Thomas linear diaphragm pump works
Operating Principle

How Does a Linear Diaphragm Pump Work?

Thomas linear diaphragm pumps are positive-displacement pumps that use electromagnetic force to move a diaphragm and transfer air through one-way inlet and discharge valves.

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Electromagnetic Drive Alternating current through electrical coils creates a changing magnetic field.
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Shuttle Movement The magnetic field drives a magnetized shuttle backward and forward.
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Diaphragm Movement The shuttle is connected to a diaphragm that changes the volume of the pump chamber.
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Air Transfer One-way valves control intake and discharge to create either pressure or vacuum.
Pump Selection

Selecting a Thomas Linear Pump for Your OEM Application

Selecting the correct linear pump requires balancing flow, pressure or vacuum, electrical requirements, noise and expected service life.

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Required Flow Determine the airflow required at the actual operating pressure or vacuum.
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Pressure or Vacuum Define whether the application requires pressure, vacuum or both.
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AC or DC Power Match the pump drive to the electrical architecture of the OEM machine.
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Noise Requirements Consider the maximum acceptable sound level of the finished device.
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Duty Cycle Confirm whether the pump will operate intermittently or continuously.
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Environmental Conditions Consider temperature, moisture, enclosure and installation environment.
Frequently Asked Questions

Thomas Linear Diaphragm Pump FAQs

Common technical questions about Thomas linear vacuum pumps and air compressors.

What is a Thomas linear diaphragm pump?

A Thomas linear diaphragm pump is an oil-free positive-displacement pump that uses electromagnetic force to move a diaphragm and create pressure or vacuum.

Are Thomas linear pumps oil-free?

Yes. Thomas linear diaphragm pumps do not require lubricating oil, making them suitable for applications requiring clean, contaminant-free air.

Are linear diaphragm pumps quiet?

Yes. Low sound and vibration are important advantages of linear diaphragm technology, making these pumps suitable for medical, laboratory and indoor OEM equipment.

What flow rates are available from Thomas linear pumps?

Depending on the technology and model, Thomas linear pumps cover open-flow rates from approximately 0.031 CFM up to more than 22 CFM.

What pressure can Thomas linear pumps produce?

Vibrating-armature models can provide continuous pressure up to approximately 700 mbar or 10.87 PSI, while larger linear magnetic platforms provide up to approximately 450 mbar.

What vacuum can Thomas linear pumps achieve?

Vibrating-armature models can achieve vacuum up to approximately 550 mbar, equivalent to about 16.24 inHg, depending on the model.

What applications use Thomas linear diaphragm pumps?

Typical applications include hospital air mattresses, compression therapy devices, air and gas sampling, de-soldering equipment, aquaculture aeration, sewage aeration and greywater treatment.

Can CompreVac help select a Thomas linear pump?

Yes. CompreVac can assist with model selection based on airflow, operating pressure or vacuum, voltage, duty cycle, noise limits and OEM installation requirements.

Thomas Linear Pump Sales & Application Support

Need Help Selecting a Thomas Linear Diaphragm Pump?

Contact CompreVac with your required flow, pressure or vacuum, voltage, duty cycle and application details. We can help identify the appropriate Thomas linear diaphragm pump or compressor for your OEM equipment.

Thomas Linear Diaphragm Pumps and Compressors

Thomas provides linear diaphragm pumps and compressors to OEMs for a broad range of medical, environmental, and industrial applications. Thomas oil-free linear pumps and compressors are the best choice for pressure and/or vacuum applications that require oil and contaminant-free air, compact designs, high efficiency, low power consumption, and very low noise levels.
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Thomas Linear Diaphragm Pumps and Compressors

Thomas provides linear diaphragm pumps and compressors to OEMs for a broad range of medical, environmental, and industrial applications. Thomas oil-free linear pumps and compressors are the best choice for pressure and/or vacuum applications that require oil and contaminant-free air, compact designs, high efficiency, low power consumption, and very low noise levels.
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Benefits of Thomas Linear Diaphragm Pumps and Compressors
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Thomas linear diaphragm compressors and vacuum pumps are used whenever the customer requires easily serviced pumps that provide low sound & vibration, sealed air path, high flow at a low-pressure ratio, or aim for long life of the end device.A substantial advantage over other pump technologies is that there are no wearing parts, such as brushes, bearings, rings, vanes or cup seals in linear pumps and compressors, which means fewer parts, less friction, and fewer failure modes.

Thomas Linear Diaphragm Compressors and Pumps for All Market Needs
Thomas provides various product series of linear magnetic and vibrating armature motor types. The vibrating armature pump series operates at AC or DC drive are capable of pressure or vacuum operation. Vibrating armature linear pump series provide open flows rates ranging from 0.031 cfm (900 ml/min) up to 0.300 cfm (8.5 l/min), continuous maximum operating pressure up to 700 mbar (10.87 psi), and maximum vacuum up to 550 mbar (16.24 in Hg).The linear magnetic motors operate with either AC or DC drive and provides open flow rates ranging from 0.052 cfm (1.5 l/min) up to 22.07 cfm (625 l/min), maximum continuous operating pressures up to 450 mbar (6.53 psi), and maximum continuous operating vacuum up to 300 mbar (8.86 in Hg).
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Linear Pumps Suitable for Wide Range of OEM Applications
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The Thomas range of linear pumps for vacuum and pressure is often the OEM first choice technology when designing drive units are chosen for hospital bed air mattress inflation, air and gas samplers, or de-soldering applications. Whereas our enclosed blowers are the number one choice for sewage aeration market.OEMs rely on our linear compressors, and linear vacuum pumps for economical and long-lasting solutions, that provide a range of technical benefits. These benefits include high efficiency, low power consumption, low sound levels, as well as a sealed air path, high flow to low-pressure ratio.

Featured Applications using Linear Vacuum Pumps and Compressors

  • Aquaculture, Battery and Pond Aeration
  • Air and Gas Samplers
  • Compression Therapy Devices
  • De-Soldering Machines
  • Hospital Beds/Air Mattresses
  • Sewage Aeration, Greywater Treatment

How Do Linear Pumps and Compressors Work?
The linear diaphragm air pump and compressors are a type of positive displacement pump. They use electromagnetism to apply force to a diaphragm that transfers the air through one-way valves. The drive alternates the current in electrical coils to reverse the magnetic field induced around a magnetized shuttle. The shuttle has a diaphragm/piston attached to its end and is used to push the air through the pump valves.

Linear gas pumps and compressors are oil-free, meaning they don't require lubrication. In addition to that, these pumps don't have any wearing or sliding parts. Their case is made out of durable and robust materials, keeping them safe from the environmental conditions. Selected units are equipped with rubber feet.