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Electric ELQ Actuators |
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Modular construction is used extensively in the new generation of
electric actuators, the ELQ series. Plug in modules are used for an
extensive range of control options, these enable the basic actuator
specification to be easily extended to that of fully-fledged control
valve actuators.
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Innovative Design |
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The basic actuators' digital electronics enable communication with the
newest fieldbus systems as well as the traditional 4 - 20 mA. analog
signals. Further product innovations include the addition of drive
inserts for easy mounting to a wide variety of valve types and an
exclusive universal power supply connection. Here most AC DC and three
phase supplies may be directly connected to the actuator. Thus the ELQ
can rightly be regarded as the new generation of electric actuators.
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Features |
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- Low power consumption
- Saves power and cables, and
therefore cost.
- 100% duty rating
- Can be used for all applications,
and protects against the motor overheating.
- 100% torque over the entire
stroke
- To cover all applications, even
those valves with complex torque patterns.
- 3,600 starts per hour
- Can be used for all modulating
applications.
- Constant engaged manual
override
- Safety non-rotating hand wheel but
constantly available for manual emergency control.
- Compact, balanced design.
- Reduces cost for pipeline support,
prevents stresses in the pipe work and eliminates side loads on the
valve spindle.
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Terminal compartment |
Removable terminal block for the supply voltage |
Exchangeable insert |
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Modular Options |
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These are plug-in modules and can be pre-installed at
the factory, at distributor level or even installed in the field, all
without special tools or any basic modification of the actuator. All
these options may be installed on actuators with or without local
control boxes.
- Speed control, with continuous and
pulsating speed reduction.
- Local control box with soft-touch
control knobs and protection class up to IP68.
- Position transmitter.
- Valve-positioner, with automatic
initialisation and intelligent digital control.
- Additional switches.
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Operating Principal |
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basic version of the ELQ is intended for simple open/close applications.
For more sophisticated applications a large variety of options provides
the solution. These options (insert modules) are easy to install on the
motherboard without any special tools. The external control signals and
the signals for the various insert modules are passed to the electrical
motherboard via the terminal compartment, the 'serving hatch' of the
actuator. The terminal block too is a plug-in item, so that when
interchanging actuators the terminal block complete with its wiring may
be reconnected to another ELQ.
The ELQ is provided with efficient,
high-ratio reduction gear system. This provides the benefits of low
power consumption, low noise emission and minimum backlash in the gear
drive. All with an extremely light and compact unit. |
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Options |
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Due to their modular construction, ELQ options can be easily installed.
The options are: |
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- Extra limit switches.
- Position transmitter
- Intelligent positioner.
- Status information module.
- Communication cards
- Speed control
- Local control unit.
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ELQ Actuator with Local Control Station
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Torque & Sizing |
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The ELQ range comprises five different size types: ELQ100, ELQ200,
ELQ300, ELQ500 and ELQ800.
The choice of actuator depends primarily on the valves' torque
requirement, but for optimum actuator sizing many factors need
consideration. El-O-Matic has available all relevant technical data on
practically all quarter-turn valve manufacturers in the world. This
electronic database enables us to select the right actuator for you,
whatever valve type: ball, butterfly or plug valve. |
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Applications |
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For some applications electric actuators are preferred to pneumatic. For
instance, where there are large distances between actuated valves, in
this case electric cabling is often less expensive than installing a
compressed air system. Electric actuators such as the ELQ with its many
possibilities may also be more suitable for applications requiring more
complex communication between control room and actuator.
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Standardisation |
The ELQ is produced in accordance with the quality standard ISO 9001.
The actuator is also in compliance with the following industry
standards:
- Water and dust proof IP67 (optionally
IP68) to IEC 529 and NEMA 4 to ICS 6-110.15.
- Explosion proof EEx d llb T4 to
EN50014/EN50018 and NEMA 7, 9 to ICS 6-110.24.
- Valve mounting to ISO 5211 and DIN
3337
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Downloads |
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