Features
Standard versions are provided with mechanical end stops, limit switches for open/close indication and anti-condensation heater. Corrosion resistant materials used throughout aluminium housing, stainless steel fastenings and hard-bronze gear transmission. Also:

• Can be applied to all ball, plug and butterfly valves.
• Low-noise, smooth running by the use of high ratio worm and wheel reduction.
• Compact construction and lightweight due to the use of high-grade
• Aluminum alloys
• Corrosion protected by the use of the external coating (2-component polyurethane).
• Wide range of voltage options.
• Self-locking reduction gear with minimum backlash in the transmission.
• Visual position indicator.
• Mountings in accordance with the ISO 5211 or DIN 3337 standard.

Actuator Range:  ELS, EL and ELD series

• The series covers the torque range from 18 to 2500 Nm (160 to 22100 lbf.in.). The ELS series is an economic choice for application on fittings with a small passage area. The ELD series is designed for heavier applications and is provided with a declutchalble manual override for emergency control.

Standards

• The ELS, EL and ELD series are produced in accordance with the quality standard ISO 9001. The actuators, depending on model size, are also in compliance with the following industry standards:  ISO 5211 EN 55014, DIN 3337 EN 50082-2, EN 50014 EN 50018, EN 50093, EN 60204 EN 60529

Operating Principle

• All actuators in this range are totally self enclosed and have thermal switches in the motor windings to prevent motors from overheating. Standardised connection flanges are used for simple installation on all quarter turn valves, such as ball, plug and butterfly valves.
  ELS actuators are the economic choice for small valves in the torque range of 18 to 25 Nm (160 to 221 lbf.in.). The basic AC or DC motors provide torque by means of a set of spur reduction gears. EL actuators cover the middle range of torque's from 55 to 800 Nm (486 to 7080 lbf.in.). They have worm/worm wheel reduction gearing and hand wheel manual override. This is directly engaged for hand operation and is disengaged on release, hence is non-rotating when under motor control. Torque switches are included to provide mechanical protection for the actuator drive and that of the driven valve components. The worm/worm wheel reduction gearing is self-locking and is exceptionally smooth and silent in operation. ELD actuators are designed for heavier applications and have torque's from 1200 to 2500 Nm (10620 to 22100 lbf.in.). They are basically similar to the EL actuators (above) but in addition are provided with a declutchalble manual override.

 Applications

• Remote operated valves mean ease of operation, increased efficiency, better control of the system and therefore an increased life span of the installation. Where there is no compressed air available, the choice for electric actuators is an obvious one, but for new installations electric actuators can have a cost advantage. The basic cost of compressed air is certainly more than that of electric power, and electrical cabling is more flexible and less expensive to install than a compressed air network.
  Electric actuators are also suitable for applications requiring a high torque: the standard version of the EL series covers torque's up to 2500 Nm (22100 lbf.in.). So which actuator should you use? 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.

 Options

• El-O-Matic EL series electric actuators are not restricted to open/close applications, with the addition of one or more of the available kit options the requirements for fully-fledged control units can often be met. For instance in many cases the addition of a positioner will enable the actuator to be used for sophisticated control applications Below is a brief summary of the available options:
• Extra switches.
• Speed controllers.
• Potentiometers.
• Position transmitters.
• Positioners.
• Local control station.
• These options may be added to factory built units, or supplied in kit form. When supplied as kits all parts are included together with a simple to follow installation sheet.