Short stroke actuator

Types of short stroke actuators

A short stroke actuator is a device that converts energy into motion. It has a shorter travel length compared to other actuators. Typically, the stroke length for short stroke actuators is under 2 inches. These small actuators work well in applications that require fast movement in tight spaces. They are more compact than standard actuators but still deliver high force. Industries use them for frequent tasks like valve control, robotics, and ejecting parts in assembly lines.

Short stroke actuators come in different types. Each type has a distinct way of converting energy into motion.

• Linear Actuator

  A linear actuator is a device that moves in a straight line. It converts rotational motion into linear motion. Linear actuators have different propulsion methods, such as electric motors, pneumatic pressure, and hydraulic fluid motion. Despite having different propulsion methods, all linear actuators are considered short stroke actuators. Linear actuators have a shorter stroke length. However, they work well in various applications. Electric linear actuators are used in vehicles to adjust windows, seats, and mirrors. Small electric linear actuators control pharmaceuticals, chemicals, food, and liquids in valves and filters. Pneumatic short stroke actuators are mainly used in manufacturing industries for assembly and packaging. They eject parts from molds, lift, press, and transfer items. Hydraulic actuators move cylinders or pistons when pressured by fluid. They are more common in heavy industries and manufacturing. Hydraulic short stroke actuators press, lift, and clamp heavy objects in construction, plastic, and mining industries.

• Rotary Actuator

  A rotary actuator has a shaft that rotates an object to different angles or positions. The common type of rotary actuators is electric motors. Other types include pneumatic actuators that use compressed air and hydraulic actuators that use fluid pressure to move a shaft. Rotary actuators are often used in larger vehicles for throttle control in gas and diesel engines. They adjust the angle of the throttle plate to regulate airflow into the engine, which affects the speed of the car. Rotary actuators are popular in industrial automation systems. They control dampers in HVAC systems, drum valves, tanks, and spray nozzles.

• Solenoid Actuator

  A solenoid actuator uses electromagnetic coils to move a plunger or rod linearly. It converts electrical energy into mechanical motion. Solenoid actuators are common in vehicles. They are used in door locks, starter motors, gas-powered vehicles, and fuel injection control. Automotive manufacturers prefer solenoid actuators because they offer exact positioning. The actuator provides repeatable precision throughout the application. Solenoid actuators are also used in robotics. They perform precise actions like locking mechanisms, coupling, latching, shutting doors, and hoppers.

Specifications and Maintenance

• Actuator Size:

  Refers to the physical dimensions of the actuator, such as its length, width, and height. This will affect how it can be mounted in a system.

• Stroke Length:

  The distance that the actuator can fully extend or contract its stroke.

• Force Capacity:

  Short stroke electric actuators are specified in units of pounds (lb) of torque that can be produced. Shorters strokes can generate more torque than longer strokes.

• Speed:

  This is the time taken for the actuator to move between two positions. Speed is usually specified in seconds per inch.

• Operating Temperature Range:

  A temperature range that allows an actuator to perform at optimal capacity when connected to other machinery.

• Full Rotation:

  A circular motion that allows the actuator to move exactly 360 degrees or form one complete circle.

• Power Source:

  It can be battery powered or alternating current (AC) or direct current (DC) electric motor.

For maintenance, follow these simple tips:

• Keep the Electric Actuator clean, wiping it down regularly with a damp cloth to remove dust and debris.
• Check for signs of Wear and tear.

Inspect the mounting hardware periodically to ensure it is still secure and in good condition. Actuators can become loose or unsteady over time, which may affect performance. Replace any worn or damaged mounting hardware.

• Lubricate any moving parts according to the manufacturer's instructions, taking care to use only the appropriate lubricant and to apply it sparingly.
• Protect the actuator from harsh environmental conditions that could cause damage or accelerated wear, such as extreme temperatures, moisture, and exposure to corrosive substances or elements.

Scenarios of short stroke actuators

Short stroke actuators are industrial machinery that helps to control the flow of liquids and gases. It does this by opening, closing, or regulating valves within a pipeline system. Here are some industrial scenarios where short stroke electric actuators are used:

• Oil and Gas Industry

  In the oil extraction process offshore or on land, a short stroke actuator is used for pipeline control. It regulates pressure and flow and is able to withstand high pressure and temperatures. The small actuator is reliable and responds quickly to changes. It controls pumps, compressors and blowout preventers (BOPs) to maintain a safe working environment for oil to flow uninterrupted.

• Chemical Manufacturing

  A short stroke actuator controls the flow of corrosive chemicals in chemical plants. It handles the harsh and demanding environment and enables precise flow control for different chemical reactions.

• Water Treatment Facilities

  Short stroke actuators in water treatment facilities control gates, valves and pumps. These small but powerful actuators help regulate water flow and chemical dosing during filtration and desalination processes. It ensures that clean water is produced in an efficient manner.

• Pharmaceutical Production

  Short stroke actuators used in drug manufacturing handle the flow and mixing of different liquids and gases. It ensures accuracy and repeatability in the movement of valves during production. The tiny actuators improve product quality and streamline operations.

How to choose short stroke actuators

• Nature of task:

  When choosing the right actuator, consider the nature of the task at hand. Pay attention to the load that needs to be moved, and the distance that needs to be moved. If a small weight is likely to be moved over a short distance, a short linear actuator would be suitable for the job. For heavier tasks or constant heavy workloads, consider going for a heavy-duty actuator.

• Speed and force:

  This refers to the amount of weight an actuator can move and the speed at which it can move that weight. An actuator with a higher force is suitable for heavy workloads. However, it is essential to note that higher speeds and forces normally come with higher prices. Consider the cost/benefit analysis before making a choice.

• Duty cycle and voltage:

  An actuator's duty cycle describes how long it can run without needing to rest. This is particularly important in high-demand situations, like industrial applications, where choosing an actuator with an appropriate duty cycle can prevent overheating and ensure reliable performance. Short stroke actuators are available in different voltages. Higher voltage actuators normally provide more power but also come at a higher price.

• Environmental factors:

  Consider whether the actuator will be exposed to moisture, dust, or extreme temperatures. Choosing an actuator with an IP rating can help ensure reliable performance in challenging conditions.

• Budget constraints:

  Heavy-duty short stroke actuators tend to get pricier the longer they run, the more force they provide, and the higher the voltage. Some of the things that determine the price of an actuator include its material and build quality. Short stroke actuators with a robust metallic build are more expensive than those with a plastic build. Businesses may want to consider things like the required speed, load, and working environment before making a choice, as they will determine the price and suitability of the actuator for a specific job.

Short stroke actuator FAQ

Q1: Can short stroke actuators be repaired or refurbished instead of replaced?

A1: In many cases, short stroke actuators can indeed be refurbished rather than replaced. If the actuator has experienced minimal damage or wear, it may be more cost-effective to refurbish it rather than replace it entirely.

Q2: Can short stroke actuators be used in hazardous environments?

A2: Some actuators can be used in environments with potentially explosive gases or dust. These often have an explosion-proof design and construction. Buyers should check whether the actuator has an Ex rating for such applications.

Q3: What material is best for a short stroke actuator?

A3: Material selection for a short stroke actuator will depend on the specific application requirements. For example, if there is a risk of corrosion, buyers should consider using materials that are resistant to such elements.