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A Part-turn actuator is an actuator which transmits torque to the valve for less than one revolution.
It does not have to be capable of withstanding thrust.
A combination of a multi-turn actuator plus a part-turn gearbox can also be considered as a part-turn actuator.
Butterfly valves
Ball and plug valves
Dampers and louvers
Other valves
A Multi-turn actuator is an actuator which transmits torque to the valve/gearbox for at least one revolution.
It may be capable of withstanding thrust.
A combination of a multi-turn actuator plus a multi-turn gearbox can also be considered as a multi-turn actuator.
Globe valves
Knife gate valves
Gate and wedge gate valves
Penstock valves
Other valves
A Linear Actuator is an actuator which transmits thrust to the valve for a defined linear stroke.
A combination of a multi-turn actuator plus a linear drive can be considered as a linear actuator.
Globe valves
Other valves
The European directive 94/9/CE states the conditions to be met for equipment items used under potentially explosive atmosphere. It classifies the installation areas according to groups and categories:
Equipment with electric connection in increased safety "e" (tight terminal box). The remaining parts of the electric equipment are in explosion proof "d" enclosure.
Explosion proof actuator. Ex de
Protection by explosion proof enclosure. Connection is achieved inside the enclosure. Enclosure is resistant to internal explosion without flame path.
Explosion proof actuator. Ex d
Group I : Equipment for underground mining.
Group II : Equipment for explosive atmosphere other than mining.
A: butane, propane,...
B: ethylene,...
C: hydrogen, acetylene
Maximum surface temperature.
T1 = 450 °C
T2 = 300 °C
T3 = 200 °C
T4 = 135 °C
T5 = 100 °C
T6 = 85 °C
Our explosion proof products have been designed for use in GROUP II, Category 2 G (D) areas.
These products shall, among other requirements, undergo a CE type examination corresponding to the sections of the CENELEC standards EN 60079, 61241, 13463 applicable for each product.
BERNARD CONTROLS can offer different levels of protection such as : Ex de, Ex d, IIB, IIC, T4, T5, T6.
NEMA |
Class |
Group |
Division |
T |
7 |
I |
Group B: Hydrogen |
1 |
Maximum surface temperature. |
9 |
II |
Group E: Metal dust |
2 |
T1 = 842 °F |
Explosion proof actuator NEMA 7 or NEMA 9
In addition to weatherproofness level which determines actuator enclosure protection, corrosion level specifies painting type of the actuator. Corrosion level is defined in ISO12944-2 standard and goes from C2 (weak) to C4 (high) and C5 (very high, either C5-I for Industrial areas with high humidity and aggressive atmospheres or C5-M for marine/coastal areas with high salinity).
Corrosion category |
Typical environments | |
Exterior |
Interior | |
C2 (low) |
Atmospheres with low level of pollution. |
Unheated buildings where condensation may occur, e.g. depots, sport halls. |
C3 (medium) |
Urban and industrial atmospheres, moderate sulphur dioxide pollution. |
Production rooms with high humidity and some air pollution, e.g. food-processing plants, laundries, breweries. |
C4 (high) |
Industrial areas and coastal areas with moderate salinity. |
Chemical plants, swimming pools, coastal shipyards. |
C5-I (very high - industrial) |
Industrial areas with high humidity and aggressive atmosphere. |
Buildings or areas with almost permanent condensation and with high pollution. |
C5-M (very high-marine) |
Coastal and offshore areas with high salinity. |
Buildings or areas with almost permanent condensation and with high pollution. |
Torque |
Duty performance |
Endurance |
<126 |
15 |
10 000 |
126 à 1000 |
10 |
10 000 |
1001 à 4000 |
5 |
5 000 |
4001 à 32 000 |
5 |
2 500 |
>32000 |
5 |
1 000 |
Torque |
Duty performance |
Endurance |
<126 |
120 |
10 000 |
126 à 1000 |
60 |
10 000 |
1001 à 4000 |
30 |
5 000 |
4001 à 32 000 |
15 |
2 500 |
>32000 |
5 |
1 000 |
Torque |
Duty performance |
Endurance |
<126 | 1 200 | 1 800 000 |
126 à 1000 |
600 |
1 200 000 |
1001 à 4000 | 300 | 500 000 |
4001 à 32 000 |
60 |
250 000 |
>32000 | 30 | T.B.A |
Torque |
Duty performance |
Endurance |
<126 | 3 600 | 10 000 000 |
126 à 1000 |
1 800 |
10 000 000 |
1001 à 4000 | 600 | 5 000 000 |
4001 à 32 000 |
N.A. |
T.B.A |
>32000 | N.A. | T.B.A |
Torque |
Duty Performance |
Endurance |
<101 | 15 | 10 000 |
101 à 700 |
15 |
10 000 |
701 à 2 500 | 15 | 5 000 |
2501 à 10 000 |
15 |
2 500 |
>10 000 | 15 | 1 000 |
Torque |
Duty performance |
Endurance |
<101 | 30 | 10 000 |
101 à 700 |
20 |
10 000 |
701 à 2 500 | 15 | 5 000 |
2501 à 10 000 |
10 |
2 500 |
>10 000 | 5 | 1 000 |
Torque |
Duty performance |
Endurance |
<101 | 1 200 | 1 800 000 |
101 à 700 |
600 |
1 200 000 |
701 à 2 500 | 300 | 500 000 |
2501 à 10 000 |
60 |
250 000 |
>10 000 | 30 | T.B.A |
Torque |
Duty performance |
Endurance |
<101 | 3 600 | 10 000 000 |
101 à 700 |
1 800 |
10 000 000 |
701 à 2 500 | 600 | 5 000 000 |
2501 à 10 000 |
N.A. |
T.B.A |
>10 000 | N.A. | T.B.A |
Thrust |
Duty performance |
Endurance |
<21 | 15 | 10 000 |
21 à 70 |
10 |
10 000 |
71 à 150 | 5 | 5 000 |
151 à 325 |
5 |
2 500 |
>325 | 5 | 1 000 |
Thrust |
Duty performance |
Endurance |
<21 | 30 | 10 000 |
21 à 70 |
15 |
10 000 |
71 à 150 | 10 | 5 000 |
151 à 325 |
10 |
2 500 |
>325 | 10 | 1 000 |
Thrust |
Duty performance |
Endurance |
<21 | 1 200 | 1 800 000 |
21 à 70 |
600 |
1 200 000 |
71 à 150 | 300 | 500 000 |
151 à 325 |
60 |
250 000 |
>325 | 30 | T.B.A |
Thrust |
Duty performance |
Endurance |
<21 | 3 600 | 10 000 000 |
21 à 70 |
1 800 |
10 000 000 |
71 à 150 | T.B.A | 5 000 000 |
151 à 325 |
T.B.A |
T.B.A |
>325 | T.B.A | T.B.A |
For all part-turn applications, spring return FQ range actuators ensure the immediate and automatic opening or closing of the valve even without any power supply, as soons as an emergency signal is activated.
This signal can be activated following:
Examples of applications: storage and distribution of gas and dangerous liquids, fire protection systems, protection of chemical facilities, air conditioning and ventilation of hazardous areas.
Electromechanical control
The control unit is designed by the customer and located in a remote cabinet.
All information sent by the actuator sensors (travel limit, torque limit, thermal overload, position feedback, ...) have to be processed by user's control logic.
Control integrated to the actuator
The control unit and power contactors are an integrated part of the actuators. It executes orders from the supervisor. In addition, it offers local controls that can be disabled locally or remotely. It can also be managed by fieldbus.
Bernard controls offers the “LOGIC” integrated control on the new ranges (INTEGRAL on the former ones). This new control includes the main features expected from modern integrated control. To learn more about this new control, visit our website.
Intelligent control
The INTELLI+® control allows easy commissioning thanks to its user friendly interface and the non-intrusive setting.
Numerous functions are available to the users helping them in their diagnostics and to schedule their valve maintenace operations. INTELLI+® also guarantees to the users an optimum availability of their industrial facilities.
Bernard controls is launches a unique mobile application that enables you to set-up and operate your valve in a few clicks. The app’ improves the reliability of your process thanks to valve activity data’ collection and keys features for your preventive maintenance plan.