SR-SL-ST Solenoid actuator for VF-VFH butterfly valves

Product catalog summary

Description
Solenoid actuators SR/SL/ST are designed for operating VF and VFH butterfly valves, which are used in two-stage control of gas and air flow in combustion processes.

Features
The actuators are available with fast opening and closing (<1s), slow opening (3-4s) with fast closing, or slow opening and closing (3-4s). They include regulating screws for flowrate adjustment and a valve disc position indicator. They are suitable for intermittent operation and numerous cycles, with a design that ensures easy installation and minimal maintenance. Components are treated for mechanical sturdiness and corrosion resistance.

Functioning and Application
These actuators are used in combustion processes to adjust air volumes for low and high fire, in annealing furnaces for auxiliary cooling, and in processes with pre-heated air for min/max regulation with heavy duty cycles.

Technical Specifications
Actuator types include SR (fast opening/closing), SL (slow opening/fast closing), and ST (slow opening/closing). They operate at a rotation angle of 0/90°, with ambient temperatures from -15°C to +60°C. Voltage ratings are 230VAC or 110VAC with a tolerance of -15%/+10%. Power consumption is 45 W (starting 180 W), with an enclosure rating of IP54 (optional IP65). Coil winding insulation is Class H (200°C) and thermal resistance is Class F (155°C).

Ordering Information
Actuators are identified by model, type, size, and voltage. Models include S..4 and S..8, with actuator types R (fast opening/closing), L (slow opening/fast closing), and T (slow opening/closing). Voltage options are 230VAC or 110VAC.

Standards and Approvals
The actuators comply with European standards for electrical safety, including Electromagnetic Compatibility (2004/108/EC) and Low Voltage Directive (2006/95/EC). The Quality Management System is certified according to UNI EN ISO 9001, monitored by Kiwa Gastec Italia Spa.

Catalog excerpts

SR-SL-ST Solenoid actuator for VF-VFH butterfly valves-1

SR, SL, ST Solenoid actuator for butterfly valves VF, VFH

Open the catalog to page 1

SR-SL-ST Solenoid actuator for VF-VFH butterfly valves-2

ELEKTROGAS – Technical Sheet EE156 - 11/11 Contents Description ………………………………………….. Features ……..……………………………..……….. Functioning and application .………………………. Technical specifications .………………….……….. Ordering information …..…………………………… Standards and approvals ………………………….. Solenoid actuators SR/SL/ST are designed to operate VF and VFH butterfly valves, used in twostage control of gas flow and air flow in combustion processes. Available with fast opening and fast closing (<1s), with slow opening (3-4s) and fast closing or with slow opening and slow closing (3-4s) Equipped with two regulating screws...

Open the catalog to page 2

SR-SL-ST Solenoid actuator for VF-VFH butterfly valves-3

ELEKTROGAS – Technical Sheet EE156 - 11/11 - When the combustion process is intermittent, a VF butterfly valve with solenoid actuator can be used, to adjust air volumes for low and high fire. - In the annealing furnaces an auxiliary cooling is often required. Air volumes is controlled by a VF butterfly valve with solenoid actuator. VF..SR - In case of combustion process with pre-heated air, VFH butterfly valve can be used. Solenoid actuator is preferentially suitable for min/max regulation with heavy duty cycles. WARNING Location and mode of installation must be in compliance with local rules...

Open the catalog to page 3

SR-SL-ST Solenoid actuator for VF-VFH butterfly valves-4

ELEKTROGAS – Technical Sheet EE156 - 11/11 Technical specifications SR fast opening and fast closing SL slow opening and fast closing ST slow opening and slow closing Overall dimensions Rotation angle 0 / 90° minimum and maximum adjustable Ambient temperature Voltage rating Voltage tolerance Power consumption Cable gland 2x ISO 20 (EN 50262) standard socket optional Coil winding insulation Coil thermal resistance SR: 1s opening/closing SL: ~4s opening / 1s closing ST: ~4s opening/closing

Open the catalog to page 4

SR-SL-ST Solenoid actuator for VF-VFH butterfly valves-5

ELEKTROGAS – Technical Sheet EE156 - 11/11 Model Actuator type R= fast opening and fast closing L= slow opening and fast closing T= slow opening and slow closing Actuator size 4 8 For more information about butterfly valves see their technical sheets. Standard Manufacturer reserves the right to update or make technical changes without prior notice. The actuators meet current European approval requirements regarding electrical safety: - Quality Management System is certified according to UNI EN ISO 9001 and the monitoring is carried out by the notified body: Kiwa Gastec Italia Spa. Via Treviso,...

Open the catalog to page 5