Pressure regulators

Pressure regulators from Festo

Pressure regulators are used in pneumatic applications to set and keep the pressure level of a machine constant. In many applications, the pressure of compressors, which supply compressed air in the range of 10...16 bar, is too high, so it has to be reduced with the help of pressure regulators. Excessive pressure leads to higher wear of the application or unnecessarily high energy costs, while with insufficient pressure the required speed or force performance is not reached. This results in fluctuations in quality and faulty results.

Operating mode of pressure regulators

The incoming compressed air that flows from the input of the pressure regulator to the valve seat is the primary pressure or input pressure. The pressure regulator ensures that the compressed air, as it flows through the valve, is at the required secondary pressure, also called output pressure. This is regulated in line with the specific requirements by adjusting the rotary knob. When the rotary knob is turned, this moves a spring that exerts a force on the upper side of the regulating diaphragm, which in turn pushes up or down. The valve tappet is actuated and the valve bore opens. When the secondary pressure drops, the spring force on the diaphragm is greater than the counteracting output pressure. This pushes the valve tappet further down, which increases the valve opening and causes the output pressure to rise again.

Pressure regulators of the MS-B series

Our new MS-B series features the second-generation pressure regulator MS-LR-B, which is our attractively priced, technical polymer series. It has a grid dimension of 25, 40 or 62 mm and is easy to operate thanks to the modern polymer materials. The air pressure is regulated and locked by a rotary knob, while integrated primary and secondary exhausting with reverse flow behaviour ensures stable control behaviour. Pressure regulator MS-LR-B is available with pressure gauge or G1/8 adapter ("A8").

MS basic series

Pressure regulators of the MS series

Our "one MS worldwide" offers a wide range of pressure regulators. From an integrated return flow function and secondary exhausting as standard to high flow rate performance and very good control characteristics, the MS series offers the right product for every application. It is available in four sizes, with mechanical pressure gauge or alternatively with pressure sensor with and without display. In addition, all pressure regulators in the MS series can be installed in service unit combinations thanks to the simple modular system of the MS series. The pressure regulators can also be configured for use in potentially explosive areas of zones 1, 2, 21 and 22 as well as with UL approval.

MS series

Pressure regulators of the D series

The D series includes the pressure regulator LR-DB with the following pressure range: 7 bar output pressure and 10 bar input pressure. Another characteristic is the high flow rate performance with good pressure stability. It is available in one size with a flow rate of up to approx. 1,300 l/min.

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Pressure regulator individual devices

Irrespective of the series, you can also obtain individual devices from us that are suitable for more sensitive applications. For example, precision pressure regulators LRP and LRPS are the ideal choice when a pressure hysteresis of 0.02 bar is required. Both regulators enable the pressure to be precisely adjusted both in static and dynamic applications. Operating pressure fluctuations are compensated for. They are available in sizes 40 mm with a ⅛" connecting thread and 300 l/min standard nominal flow rate as well as 50 mm with a ¼" connecting thread and 2,300 l/min standard nominal flow rate.

Electrically actuated pressure regulator PREL with a pressure regulation range of up to 40 bar is ideally suited for high-pressure applications. The output pressure of electric pressure regulator PREL is detected by proportional-pressure regulator VPPL using an integrated pressure sensor and compared internally with the setpoint. In case of deviations, the VPPL controls the regulator of the PREL until the output pressure reaches the setpoint value. A soft-start function is integrated as standard in the PREL. In addition, there are pressure gauge connections on the front and back of the pressure regulator.

Individual devices