Kind air compressor


Dynamic compression of the gas by the piston in the cylinder

the Operation of reciprocating pumps WOB-L based on the compression of gas, which is carried by the piston reciprocating motion (CRG) within the cylinder.

Brief technical overview

Reciprocating compressors WOB-L have a separate piston and piston rod, whereby the piston performs a reciprocating movement in the cylinder as the crankshaft rotates. Their name comes from their principle of action, WOB-L brand was patented by engineers, Тhomas forty years ago, and did these piston thomas air compressor radically different from any other project in the market at that time, and still the new technology of today.

unlike reciprocating compressors traditional Assembly, WOB-L thomas compressor does not have a piston pin connecting the piston rod with the piston; the piston and piston rod - single product, usually cast as one. The piston rod is attached to a crank mechanism (Cam), which in turn is connected to the shaft of the engine, to convert the rotational energy of the motor into rectilinear motion of the piston within the cylinder liner.

the Piston fits snugly in the cylinder liner piston seal (ring-skirt), which actually creates the flow (pressure) and is a mechanical guide for the piston, which moves without lubricant having a very low coefficient of friction, the surface of the cylinder has a high thermal conductivity. As the piston moves up and down, when moving up the piston seal is the most tightly pressed against the cylinder wall due to the air resistance, increasing the efficiency of the air compressor.

oil-Free operation makes these compressors are extremely popular in the medical, automotive, beverage production, the pressure, vacuum and discharge characteristics superior to membrane counterparts. In the operation of these compressors provide much higher costs under specified pressure or vacuum, this ensures more stable operation and will provide a longer service life, or will physically smaller pump to be used instead of a membrane similar to execute this task.

As for reciprocating compressor, a feature of this design is that the failure mode is characterized by the gradual wear and tear, and not a complete failure, which is typical for many other designs of compressors. And have any more other air compressor accessories.


creating a pressure reduction: static compression.

In rotary vane vacuum pumps and compressors compress gas by changing the volumes of the working chambers formed by the inner surface of the housing with eccentric rotating the rotor and the plates moving in the longitudinal grooves of the rotor under the action of centrifugal forces. Important part is air compressor air dryer.

  • - suitable for applications requiring pressure or vacuum Static project;
  • dry running{dry-run} models available;
  • - vacuum -930 mbar with costs up to 280 l/min maximum;
  • pressure to 1.4 bar;

Brief technical overview

In the cylindrical housing, the rotor is placed eccentric, almost touching the chassis. The rotor has longitudinal grooves located radially or slope in the direction of rotation. In the slots of the rotor laid the plate (dampers), which upon rotation of the rotor under the action of centrifugal forces are in constant contact with the inner surface of the housing cylinder. Each adjacent pair of plates together with portions of the inner surface of the cylinder barrel and the outer rotor changing form a closed working chamber filled with a compressible gas. The volume of the cavity is constantly changing during the rotation, what is the workflow of the compressor.


free-piston pumps based on the compression of gas, which is carried by the piston reciprocating motion (CRG) within the cylinder.

  • – the flow rate 35 l/min to 365 l/min;
  • – pressure up to 12 bar (175 psi);
  • – oilfree;
  • – reliable with long service life.

Brief technical overview

Free-piston compressor works as well as conventional automobile piston engine. The piston converts the rotational energy from the motor / shaft in a reciprocating motion to compress air in the cylinder. Rotational movement is transmitted through the Cam and crank to connecting rod, piston pin to which is attached the piston.

When the piston down the air through the inlet valve is sucked into the cylinder on the up stroke, the air is compressed and discharged through the exhaust valve. Piston seal from the cylinder is achieved using two spring-loaded piston rings, which are in contact with the wall of the cylinder liner. Piston skirt used as a guide for the piston in the cylinder.

These compressors are recommended for heavy industrial applications that require relatively high combinations of flows and pressures. Compressors are available with AC motors (single or three phase) or with a free shaft (are smaller, because there is no electromotor), as well as DC motors.


the Creation of the air flow straight in the electromagnetic field


linear pumps is based on the creation of the air flow through the linear motion of the armature in the oscillating circuit, with consequent impacts on the membrane or piston.

Linear and vibrating pumps and compressors use an electromagnetic field which moves armature acting on the diaphragm or piston, thereby creating air flow. Alternating electric current in the coil changes the magnetic field induced around a magnetized armature at a rate equal to the frequency of domestic network. The movement of the diaphragm/piston attached to the rod end anchor, creates an air stream, through which the exhaust valve is supplied to the consumer.

Linear/vibrating pumps and compressors silent in operation and have great performance. Having fewer moving parts than other types of compressors, compressors, respectively, have a much greater service life with minimal maintenance. However, pneumatic performance is limited by the power of the induced magnetic field, making them useful for applications with low pressure drop.

Тhomas has a wide range of linear/vibration pumps and compressors with costs ranging from 0.7 to 300 l/min at free output.


Dynamic compression flexible membrane

Diaphragm compressors (pumps) compressed gas (creating a vacuum) using a flexible membrane which is hermetically secured on the circuit fluctuates up and down by the crank mechanism.

In membrane compressors flexible diaphragm, fixed on the contour between the top cover and base plate of the compressor moves (oscillates up and down, under the action of an eccentric Cam located on the drive shaft, providing the reciprocating movement of the rod with a disk, which is fixed to the membrane. When moving down, the air is sucked into the working chamber of the compressor, and is available in the upward direction. Unidirectional butterfly valve installed in the top cover of the compressor control air flow direction. Equally applicable as a vacuum pump or as a compressor, they are characterized by low noise, high efficiency gas-tight and have a working camera.

Available with AC motors or DC, are the execution of one or head, the head which can be connected in series or in parallel, created a vacuum of 1 mbar abs, pressure up to 2.8 bar, and the flow rate in the range from 0.2 l/min to 91 l/min

Diaphragm compressors are ideal in cases where high efficiency and tightness of the chambers of the compressor, for example in portable gas samplers, gas analyzers, medical autoclaves, for various laboratory applications or anywhere, where necessary compact and highly efficient vacuum pump or compressor.


the Flow of fluid through the compression of the working tube

Work peristaltic pumps is based on creating a flow of liquid within the tube, multiple rotating rollers.

peristaltic pumps operate using a forced eviction. The fluid is forced to move along the tube by a set of rotating rollers that rotates, compresses a flexible tube in a stationary pump housing. Because rotating the rollers are moved along the length of the tube, this allows a new portion of the liquid to get into the enlarged tube and then move predavlivali other roller. During operation there is always at least one roller that is in contact with the tube all the time, so there is no need for valves to prevent backflow. Rotating the rollers or roller cassettes are connected directly to the motor shaft or device that can adjust the speed of rotation. If the pump is direct drive, increasing or decreasing the motor speed can be controlled by the amount of water used. Peristaltic pumps are ideal for handling corrosive substances and viscous liquids, since the only part of the pump, which is in contact with the fluid tube. The tube is a replacement part as well as cassette with rollers.

Тhomas has 5 sizes of pumps with a flow rate of 0.18 ml/min up to 2900 ml/min depending on the pumped liquid, offers a variety of tube materials table are compatible with environments that are pumped. Each of the 5 sizes of pumps can be motor AC or DC (pumps may be reversible) and all of them are self-priming.

And you need remember about change air compressor air filter.