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Vacuum measurement, control and adjustment instruments

Vacuum and pressure unit conversion table

Vacuum and pressure unit conversion table

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Vacuum and pressure gauges

Vacuum and pressure gauges

The measurement method of our vacuum gauges is based on the principle of the Bourdon spring (Eugène Bourdon, France, 1808–1884). It is made using section tubes in special copper alloy, one end is welded to the threaded pin of the vacuum-pressure gauge, thus forming a single body with it, while the other closed end is free As the vacuum or the pressure inside increases, it tends to shift from the initial position (Bourdon effect). The movement of the free end of the spring determines the vacuum-pressure measurement. In order to allow an easier reading, this movement is amplified by means of a connection lever and transmitted to the pointer. All is enclosed in a sturdy metal casing which contains the dial and the pointer, that can be seen through a glass. They are available in various versions, with coaxial or radial connectors, with built-in or external flange, dry or glycerine filled. Except for vacuum gauges with diameter Ø 40 mm, all the other models have a double scale dial. All the vacuum and pressure gauges we will describe in these pages are made in compliance with all the safety standards and measurement units in force in the European Union.
Product codes: 090315 090320 090325 090310 090110 090116 090210 090510 090516

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Vacuum gauges with steel punch

Vacuum gauges with steel punch

This vacuum gauge has been designed to allow the immediate detection of the vacuum level inside tin cans and food containers in general. The glycerine bath vacuum gauge art. 09 05 16 used for this application (features described in the previous page), is provided with a hardened steel punch to easily perforate the containers and with a vacuum cup in silicon compound to guarantee vacuum seal after perforation. It is available in the standard version (which is the one shown in this page), but can be provided in other versions upon request.
Product code: 090599

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Mini pneumatic vacuum switches

Mini pneumatic vacuum switches

These vacuum switches feature reduced overall dimensions and, according to the model, they give or remove a pneumatic signal when a certain adjustable vacuum level is reached.
The pressure differential between the set maximum value and the value of reset of the rest signal is not adjustable.
They are particularly suited for controlling vacuum generators and for activating pneumatic valves.
Product codes: 120130 120230

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Mini electromechanical vacuum switches

Mini electromechanical vacuum switches

These vacuum switches feature reduced overall dimensions and give an electric signal when a certain adjustable vacuum level is reached.
The pressure differential existing between the set maximum value and the value of reset of the rest signal is 50 ÷60 mbar and it is not adjustable.
They are particularly suited when an electrical signal is needed when a certain vacuum level is reached, for safety, for starting a cycle, for checking the cup grip, etc.
Product code: 120210

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Electromechanical vacuum - pressure switches

Electromechanical vacuum - pressure switches

The vacuum - pressure switches of the 836 series are compact, sturdy and accurate units that can be adapted to many applications. The feature of the control is a quick tripping precision micro switch, equipped with silver contacts. Normal industrial vibrations have no effect on the efficient opening and closing of the contacts.
The particular linear construction, relatively friction free, assures a precise and reliable operation independent of the pressure switch mounting angle.
The “Long Life” bellows with which they are equipped, are made of copper alloy and can be used for air, water, oil, liquid, vapour and gas circuits, provided that all these agents are not corrosive.
These devices are included in the U.L. lists and approved by C.S.A.
Product codes: 836-C6A 836-C2A

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Micro digital vacuum switches

Micro digital vacuum switches

These small devices, if accurately calibrated and compensated for temperatures, are able to give very precise digital signals to the set maximum measuring value. The commutation point, which is within the scale value, can be easily programmed by means of an adjustment screw located on the upper part of the device.
A red LED near the screw indicates the digital output signal commutation status.
The pressure differential (hysteresis) between the set maximum value and the value of reset of the rest signal is 2% of the set value and cannot be adjusted.
They are composed of a polycarbonate enclosure, which includes the sensor and the electric circuit, and of a coupler or a small aluminium manifold with the vacuum connections.
Art. 12 05 10 can also be rotated freely to place the display in the desired position, without having to unscrew it from the vacuum connection. The vacuum connection can be carried out via male or female M5 connectors, while the electrical connection is made via a three-connector cable which they are equipped with.
Mini digital vacuum switches are suited for controlling dry air and non-corrosive gasses and they are recommended in all those cases that require a signal when a certain vacuum level is reached, for safety, for starting a cycle, for checking the cup grip, etc.
Product codes: 120510P 120510N 120511P 120511N

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Analog vacuum switches

Analog vacuum switches

These compact and extremely light switches come enclosed in a sturdy ABS casing; these features allow their installation on the machine and close to the application. If accurately calibrated, these analog switches provide very precise measurements values.
The adjustment range is from 0 to -1 bar (g) and can be interfaced with external logics via an analog output from 1 to 5 Volts and a digital PNP output, configurable via Teach-In.
The commutation point, as well as the hysteresis from 0 to 100% of the set value, can be easily programmed via push buttons located on the control panel; the two two-colour LEDs on the control panel signal the commutation status and the error code, if any.
These devices can be rotated freely to place the display in the desired position, without having to unscrew them from the vacuum connection. The vacuum connection is dual threaded: male G 1/8” or female M5.
The electrical connection is an M8 4-pin threaded plug and upon request the connection cable is available in PUR, with an axial or radial connector.
These vacuum switches are suited for measuring and controlling dry air and non-corrosive gasses. They are recommended in all those cases that require a measurement and commutation to be installed on safety or energy-saving devices, on systems for optimising the work cycle time and in circuit vacuum level adjustment circuits.
Product codes: 120710 001220 001221 001222

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Digital vacuum and pressure switches

Digital vacuum and pressure switches

These compact and extremely light digital vacuum and pressure switches are enclosed in a sturdy ABS casing. These features allow installation on the machine and close to the application.
These digital switches, accurately calibrated and compensated for temperatures, is able to give very precise measurements values. The measured values are shown on the display, making the vacuum gauge redundant. The two LEDs, one red and one green, built-in the control panel, indicate the commutation status of the two digital output signals. The two commutation outputs are completely independent.
The switch point between the scale values as well as the hysteresis from 0 to 100% of the set up value can be easily programmed via the push buttons on the control panel. Other additional functions can be configured, such as the comparison between two values, NO and NC contacts, choice of the measurement unit, locking the programmed values and functions, display reversal, etc.
These devices can be rotated freely to place the display in the desired position, without having to unscrew them from the vacuum connection.
The vacuum or the pressure connections can be carried out via a dual male G 1/8” or female M5 thread. The electrical connection is carried out via M8-4 pin threaded plug and upon request the connection cable is available in PUR, with an axial or radial connector. These switches are suited for measuring and controlling dry air and non-corrosive gasses.
They are recommended in all those cases that require a signal when a certain vacuum level is reached set for safety, for starting a cycle, for checking the cup grip, etc. Moreover, the hysteresis function allows managing the vacuum generator compressed air supply, allowing considerable energy saving.
Product codes: 121010 122511 001220 001221 001222

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Digital vacuum and pressure switches

Digital vacuum and pressure switches

These compact and extremely light digital vacuum and pressure switches are enclosed in a sturdy ABS casing. These features allow installation on the machine and close to the application.
These digital switches, accurately calibrated and compensated for temperatures, is able to give very precise measurements values. The measured values are shown on the display, making the vacuum gauge redundant. The two LEDs, one red and one green, built-in the control panel, indicate the commutation status of the two digital output signals. The two commutation outputs are completely independent.
The switch point between the scale values as well as the hysteresis can be easily programmed via the push buttons on the control panel. Other additional functions can be configured, such as the comparison between two values, NO and NC contacts, choice of the measurement unit, locking the programmed values and functions, display reversal, etc.
The vacuum or the pressure connections can be carried out via a dual connection with female G 1/8” thread, while the electrical connection is carried out through the 4-conductor cable which they are equipped with. Digital vacuum and pressure switches are suited for measuring and controlling dry air and non-corrosive gasses.
They are recommended in all those cases that require a signal when a certain vacuum level is reached, for safety, for starting a cycle, for checking the cup grip, etc. Moreover, the hysteresis function allows managing the vacuum generator compressed air supply, allowing considerable energy saving.
Product codes: 122010P 123510P

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Accessories for digital vacuum and pressure switches

Accessories for digital vacuum and pressure switches

Cable with axial connector
Cable with radial connector
Wall-mounting kit
Fixing kit
Product codes: 001220 001221 001222 001230 001231 001232

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Vacuum regulators

Vacuum regulators

Vacuum regulators are used to adjust the pre-set vacuum level, keeping it constant (secondary vacuum), regardless of the capacity and the oscillations of the network vacuum level (primary vacuum).
Their operation is with a membrane-piston and they exploit the pressure differential between the secondary vacuum and the atmospheric pressure. Unlike the vacuum adjusting valves, regulators do not introduce air into the circuit, thus producing more gripping points with different vacuum values, from only one vacuum source.
The vacuum level is adjusted by rotating the special reeded screw clockwise to increase it, and anti-clockwise to reduce it.
Technical features
- Operation: membrane-piston regulator.
- Adjustable operating pressure: from 800 to 1 mbar abs.
- Capacity: from 2 to 160 cum/h.
- Room temperature: from -10 to +80 °C.
- Installation position: any.
Usage
Vacuum regulators are mainly used on centralised plants where, regardless of the plant vacuum level, each grip can be adjusted within that value. Moreover, they are necessary whenever the working vacuum must be lower than the primary vacuum.
Product codes: 110110 110210 110310 110410 110510 110610

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Regulators for low vacuum levels

Regulators for low vacuum levels

The regulators described in this page are based on the same operation principle as the ones described in the previous page and have the same function. The only difference is that in these ones the minimum adjustable vacuum level is close to the atmospheric pressure value.
The vacuum level is adjusted by rotating the special reeded screw clockwise to increase it, and anti-clockwise to reduce it.
Technical features
- Operation: membrane-piston regulator.
- Adjustable operating pressure: from 980 to 1 mbar abs.
- Capacity: from 20 to 160 cum/h.
- Room temperature: from -10 to +80 °C.
- Installation position: any.
Use
These regulators are used as the previously described ones, but they offer the additional advantage of regulating even vacuum levels close to the atmospheric pressure.
Product codes: 110350 110550 110650

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Vacuum regulators with pneumatic adjustment

Vacuum regulators with pneumatic adjustment

Vacuum regulators with pneumatic adjustment differ from the previous ones for the way they adjust the vacuum level; in fact, instead of acting manually on the adjustment screw, it is necessary to act on the pneumatic cylinder compressed air supply: the higher the pressure, and the higher the vacuum level and vice versa.
Vacuum regulators are used to adjust the pre-set vacuum level and keep it constant (secondary vacuum), regardless of the pump vacuum level (primary vacuum).
Unlike the vacuum adjusting valves, regulators do not introduce air into the circuit, thus producing more gripping points with different vacuum values, from only one vacuum source.
Their operating principle is based on the contrasting action between a pneumatic cylinder with short stroke and a fluctuating piston driven by the pressure differential existing between the secondary vacuum and the atmospheric pressure.
Technical features
- Operation: membrane-piston regulator.
- Supply pressure: from 0 to 3 bar (g) for regulators art. 11 .. 30; from 0 to 5 bar (g) for regulators art. 11 .. 80.
- Adjustable working pressure: from 800 to 1 mbar abs. for regulators art. 11 .. 30; from 980 to 1 mbar abs. for regulators art. 11 .. 80:
- Capacity: from 2 to 160 cum/h.
- Room temperature: from -10 to +80 °C.
- Installation position: any.
Usage
Vacuum regulators are mainly used on centralised plants where, regardless of the plant vacuum level, each grip can be adjusted within that value. Moreover, they are necessary whenever the working vacuum must be lower than the primary vacuum and kept constant. Vacuum regulators with pneumatic adjustment can be installed away from the control point, since it is sufficient to have a pressure regulator on the control panel to act on them.
Product codes: 110130 110230 110330 110430 110530 110630 110380 110580 110680

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Diagrams referring to the vacuum level according to the servo-control supply pressure

Diagrams referring to the vacuum level according to the servo-control supply pressure

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Vacuum adjustment valves

Vacuum adjustment valves

When these valves reach a certain pre-calibrated vacuum degree, they introduce atmospheric air into the circuit to prevent the increase of the set value and to keep it constant.
They can be used as regulators only on circuits having only one vacuum pump and only one use (or more uses but all working at the same vacuum degree)
In most cases they are used as safety valves on non-commissioned tanks or containers at high vacuum levels and on vacuum cup lifting systems. The vacuum level is adjusted by rotating the knurled bush in both directions. The fine thread with which the valve is provided ensures a very accurate calibration.
Product codes: 040110 040210 040310 040410

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