Electric Linear Valve Actuator With Spring Return
OVERVIEW
This actuator uses a synchronous motor and gear mechanism to convert rotary motion into linear push rod action. It receives 0 (2)-10Vdc analog control signals and outputs 2-10Vdc real-time valve position feedback. Signal range switching, positive/reverse action switching, and signal disconnection fault location customization can be achieved through buttons and potentiometers on the circuit board. It comes with a manual operation knob and is equipped with a transport locking device that must be removed before power-on. It also supports optional auxiliary switches and high-temperature kits to adapt to different temperature media conditions. In the event of power failure, the spring mechanism drives the push rod back to the preset safety valve position to ensure the safe operation of the system equipment.
FEATURES OF ELECTRIC ACTUATORS
Installation is simple and quick, requiring no additional linkage mechanism or on-site mechanical adjustment. Low power consumption, maintenance-free operation, and corrosion-resistant structural design. It features adaptive function and thrust limit terminal stop protection to prevent valve overload damage. Equipped with a manual operation knob, the valve opening can be manually adjusted in the power-off state, and the knob automatically unlocks when switching back to automatic mode. Supports 0 (2)~10Vdc control signal input and 2~10Vdc valve position feedback output, supporting remote valve position monitoring. Hardware switching between positive and negative action modes is possible to adapt to different valve body flow logic. In case of signal disconnection, the push rod can be set to any safe stop position within 0-100% of its stroke, with a factory default of 50% middle position. Built-in spring reset mechanism automatically drives the valve to a safe position after power failure, meeting the fault safety requirements of HVAC systems. The housing has a UL94-V0 flame retardant rating and an IP54 protection rating, suitable for the computer room environment. Supports on-site installation of dual auxiliary switch modules, high-temperature kits, and other accessories to expand alarm, interlock, and high-temperature media usage capabilities.
PRODUCT ADVANTAGES
Diversified needs
The process technology sites of supporting pipelines and automated valves are all over the world. Not only the site and valve type are important factors in the selection of electric actuators, but also the climate environment of on-site operation is crucial. FRY-A electric actuators guarantee safe and reliable service under various extreme environmental conditions.
Superior performance
Quality Assurance
Only when all on-site equipment provides reliable service throughout its entire life can the entire process site be efficient, economical and safe.
Long warranty period
MAIN FUNCTIONS
Explosion Proof
Based on your specific hazardous area classification and medium type (Group IIA/IIB/IIC gases or dusts), custom-engineer explosion-proof mini‑type electric flanged ball valve consists of an electric actuatorthat fully comply with international and domestic standards, including IECEx, ATEX, and GB 3836.
Colors
You can provide your own color code or choose special coatings for corrosion resistance, weather resistance, or high-temperature warning. Using advanced spraying technology and high-quality coatings, we ensure a durable, uniform finish. This gives your equipment a personalized look while maintaining long-term durability in industrial environments.
Protection grade
Based on your installation environment - outdoor rain, coastal salt spray, desert dust, or food/pharma workshops needing high-pressure washing. We provide sealing solutions from basic dust/water protection (IP65/IP67) to ultra-high protection (IP68/IP69K).
Low-temperature
For the specific operating conditions in extremely cold regions, we offer professional, deeply customized low-temperature environment services for Manual Worm‑gear PTFE‑Lined Butterfly Valve . By employing special low-temperature resistant materials, wide-temperature-range lubricants, and intelligent heat tracing systems, we ensure that the equipment can reliably start and operate accurately even in extremely low-temperature environments. We also comprehensively optimize the cold resistance of seals, electronic components, and display screens to effectively prevent problems such as lubrication freezing, sluggish displays, or start-up failures caused by low temperatures.
CONTROL MODE
External control All actuator signals, such as limit switch signals, torque switch signals, motor thermal protection and valve position, can be transmitted to the external control device for further processing. When designing the control logic architecture, it is necessary to fully consider the necessary protection mechanisms and minimize the delay time.
The contactor device used to control the operation of the motor is installed in the external control device and connected to the actuator via a cable.
When a local control operation interface is required, the local control operation interface should be installed near the actuator and integrated with the external control device.
Integrated control
When the actuator is powered on, the actuator with integrated control unit can be operated by the operating elements of the local control. The control unit is fully adapted to the actuator. The actuator can be set up on site without connecting to the DCS system. Only the transmission and exchange of operating commands and feedback signals are required between the control system and the actuator. The on-off control of the motor is completed instantly in the device.
Fieldbus
The use of bus cables can save a lot of space in the control cabinet, and it is more obvious that the traditional input and output signal line connection is outdated. The use of two-core cables simplifies the commissioning phase and greatly reduces the cost of cables in the long-distance field.
Another major advantage of fieldbus technology is the transmission of preventive maintenance and diagnostic information to the control room. Therefore, fieldbus technology integrates all fieldbus devices into the asset management system to support the safety protection measures of field device utilization. Actuators equipped with intelligent integrated control units can be applied to various common standard types of fieldbus systems in process automation.
Selection
OPERATION
General
The drive of a synchronous motor is converted into linear motion of the actuator stem via a spur gear transmission. The actuator stem is connected with the valve stem by a buttonkeyed retainer connection. An integrated spring package limits the stem force to a factory-set value in either direction. The actuator switches off precisely when the specified stem force is reached.
Manual Operation
There is manual operation knob under the cover that can be used in case of power failure. Manual operation is permitted only after the power supply is switched off or disconnected. To operate, push the manual operation knob down and turn clockwise to move the stem downward and counterclockwise to move the stem upward. If the actuator returns to automatic control, the manual operation knob unlocks automatically.
Override Option
All actuators have an integrated override function (see wring). When the override signal is applied, the actuator drives to the fully-open or fully-closed position,regardless of the controller signal.
Electrical Installation
The actuators are delivered with a pre-installed cable gland M20 and two additional knock-outs for M18 and M20. Max. cable length/diameter for field mounting: 200 m / 1.5 mm2
NOTE: To avoid malfunction, it is necessary to connect
24 Vac power and ground (see wiring)
Go into self-adaption mode
Mount the actuator on the valve and electrified. Press down W2 and W3 at the same time more than 2 s until LED begin to flash and actuator go into self-adaption process. The actuator will work one whole stroke automatically, then the LED stops flashing and self-adaption completed. The actuator will return to the position before self-adaption process. NOTE: Self-adaption mode needs to be manually got into which will work only one whole stroke of the actuator.
Input Signal Range
The range of the analog input signal Y can be changed by pressing the right-hand pushbutton (W2) located on the printed circuit board (see Fig. 1). If the corresponding LED is lit, this indicates that the actuator is set for 0...10 V operation (factory setting); if it is dark, the actuator is set for 2...10 V operation.
Input Signal Failure
Using the potentiometer (W1) located on the printed circuit board (see Fig. 1), the actuator can be adjusted such that in case of a signal input failure (e.g. a broken wire), the actuator will run to any pre-configured position between 0% and 100%. The factory setting is with the actuator stem in the central position (50%). NOTE: The two pushbuttons (W3 and W2) and the potentiometer (W1) are accessible after the cover has been removed and are located at the rear side of the protection sheet of the printed circuit board.
Spring Return
The ML7425A spring return actuators provide a defined safety position of the valve in case of power failure. The spring return actuators are shipped from the factory with a shipment stop (to lock the manual operation knob) in order to allow connec-tion of the stem button retainer to the valve stem without power supply.NOTE: To avoid malfunction, it is necessary to remove the shipment stop when power on.
Output Signal "POSITION"
An analog output signal 2...10 Vdc "POSITION" is available which represents the actual actuator position. It can be used for remote indication. When the actuator stem is fully extended, the output signal is 10 Vdc.
Action
The direction of action can be reversed by pressing the lefthand pushbutton (W3) located on the printed circuit board (see Fig. 1), If the corresponding LED is lit, this indicates that the actuator stem will retract at a control signal of 0(2) Vdc (factory setting); if it is dark, the actuator stem will extend at a control signal of 0(2) Vdc.
Accessories Auxiliary Switches
The actuators can be equipped on-site with an auxiliary switch unit with two switches. Their switching points are adjustable over the full length of the actuator stroke. The switches can be used to switch pumps or provide remote indication of any stroke position. A cable gland M20 is delivered with the unit. Part number: 43191680-205 High-Temperature Kit (for application ≥ 150°C medium temperature) Part number: 43196000-001
43196000-002
CLOSE-OFF PRESSURE RATINGS
DIMENSIONS
WIRING
COMPANY INTRODUCTION
Founded in 2014, Freya mainly deals in valves, actuators, electric valve actuators, electric valves and other fluid control products and services. It focuses on the process industry field and has long been committed to providing professional fluid control solutions for process industries such as electricity, steel, building materials, and water treatment. According to actual working conditions, through necessary field surveying and technical disclosure, it provides customers with safe, economical, and environmentally friendly selection and design, strictly supplies and guides installation and commissioning in accordance with contract requirements, and hands over for use when the standards are met. The company has always focused on improving its innovation capabilities, and has achieved a series of innovative results by increasing R&D investment and introducing technology. In the past few years, the company has successfully applied for non-invasive appearance patents and utility model patent certificates. These innovative achievements have improved the company's core competitiveness.
APPLICATIONS
CERTIFICATES
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