Pneumatic actuator valves for manufacturing - SIO

Pneumatic Actuator Valves

SIO also manufactures a variety of top-quality actuators. Pneumatic actuators are mainly used to convert compressed air energy into mechanical energy to carry out the needed work. They have a quick response time, but they’re not ideal for applications that need high amounts of pressure.

Pneumatic actuators are commonly used in operations that require extreme temperatures. Since they use air, these actuators are safe in the sense that they don’t use hazardous materials. They pass the explosion protection as well as the machine safety specifications as they don’t produce any magnetic interference.

You can rely on SIO to provide you only the best pneumatic actuators for your automatic applications.

    What Is a Pneumatic Valve?

    Pneumatic valves are one of the components in a pneumatic system. They are responsible for the regulation of the rate, pressure, and amount of air moving throughout the system. In various industrial applications, pneumatic systems transmit power by using the force of compressed air.

    Pneumatic actuated valves regulate, start, or stop the flow of fluid through compressed air. These valves are greatly used in numerous industrial applications, from chemical to medical, and from corrugation to automation.

    SIO only manufactures high quality pneumatic actuator valves which convert compressed air energy into mechanical energy to get the work done. SIO pneumatic valves have a quick response time, which is why they are needed in operations that require extreme temperatures, like heating equipment to control the flow of fuels and steam.

    Whether in extreme heat or cold, inside or outside, in a dusty or humid environment, SIO Pneumatic Actuator Valves are durable and reliable. These valves are completely safe since manufacturers do not use hazardous materials in creating them. SIO Pneumatic Valves passed machine safety specifications and explosion protection since these valves do not create any magnetic interference.

    We only provide the best pneumatic valves for your automatic applications.

    What Valves Can be Used in Pneumatic Applications?

    Manual high-pressure ball valve

    1. Ball Valve

    Pneumatic actuated ball valves control the flow of fluid through compressed air from one opening to the next using a ball. In the center of the ball, there is a port which is popularly known as the bore. One of the features of a ball valve is that it can be opened and closed easily. When the valve is open, and the bore is aligned with the pipeline opening, the fluid passes through the valve. The bore is then placed in a perpendicular position with the pipeline opening once the valve is closed since it blocks the flow of the fluid from passing through.

    A pneumatic ball valve is easy to operate. It has an airtight seal whenever it is closed, making it a reliable and durable choice for pipeline and gas applications where tight shutoff is essential. It is also an ideal valve for transmission and storage, chemical, pharmaceutical, and oil processes.

    2. Butterfly Valve

    Pneumatic butterfly valves are a type of shutoff valves with a disk positioned in a rotating shaft. These valves regulate, start, and stop the flow of fluid through the use of compressed air. When the valve is closed, the disk blocks the line completely, and when it is open, the disk is perpendicular to the flow of the fluid. Pneumatic butterfly valves are fast and easy to open. With a 90-degree rotation, butterfly valves can be closed or opened entirely.

    Pneumatic actuated butterfly valves are very compact. They are widely used for several applications, like wastewater treatment, chemical, and oil industries, gas supply and fire protection, and power generation systems.

    SIO High performance butterfly valve

    Source: Indiamart

    3. Diaphragm Valve

    Pneumatic diaphragm valves are linear motion valves that use compressed air to regulate and control the flow of the liquid. These valves are all bi-directional. The fluid passages of pneumatic diaphragm valves minimize pressure drop since they are smooth and streamlined. Because the fluid stream is separated from the working parts of the valve, the corrosion of the operating mechanism and the contamination of the fluid can be prevented. The valve stem has no leak path, making the valve leak-tight.

    Pneumatic actuated diaphragm valves are either semi-automated or automated. With air pressure on a diaphragm that is connected to the stem, the air signal is translated to a valve stem motion, making these diaphragm valves work. Pneumatic actuated diaphragm valves use a spring, which makes the spring pressure to close the valve and the air pressure to open the valve.

    Pneumatic diaphragm valves have a tight shutoff and a leak-proof seal, which reduces the chances of leakage in the environment. Suitable for throttling and open-close positioning, pneumatic diaphragm valves are best for water treatment, pharmaceutical, and food processing industries.

    4. Gate Valve

    Primarily designed for on-off services, pneumatic gate valves regulate, start, or stop the flow of the liquid through the use of compressed air. Gate valves are considered as one of the most common types of valves used in process plants. These valves are used when minimum flow restriction and a straight line fluid flow are both required. Generally speaking, gate valves are either fully closed or open.

    Pneumatic actuated gate valves are manufactured to minimize pressure drop across the valve when it is fully open and also stop the flow completely. As the gate valves are fully open, the disk of the valve is removed from the flow, which establishes no resistance to flow virtually. There is no change in the direction of the flow of the fluid and the diameter where the fluid passes through. Thus, allowing a minimal pressure drop once these valves are open.

    Gate valves are widely used in various applications such as pharmaceutical, automotive, marine, manufacturing, and oil and gas industries. These valves are also used in applications involving liquids with high viscosity, for example, varnish, honey, light grease, and heavy oils.


    Source: Indiamart

    Globe control valve

    5. Globe Valve

    Pneumatic globe valves are primarily used to regulate, start, and stop the flow of the fluid through compressed air. As a common choice of valve in the process industry, pneumatic actuated globe valves are used not only for on and off applications, but also for precise throttling applications. Compared to other types of valves, globe valves have a higher pressure drop.

    As mentioned, pneumatic actuated globe valves have an excellent throttling ability due to the gradual change in spacing between the seat ring and the disk. This space allows the fluid to pass through the valve, causing a shift in the direction which also increases the pressure inside the valve. Globe valves maintain a tight seal when they are closed since these valves are usually installed with the fluid stream connected to the pipe side, which is located above the disk, and the stem placed in a vertical position.

    When the pneumatic globe valves are opened, the fluid travels through the space between the seat and the edge of the disk. The distance of the plug and the seat determines the rate of fluid that will flow through the valve.

    Pneumatic globe valves are an ideal choice for applications that require flow regulation and leak tightness, such as low-point drains and high-point vents. They are also typically used in cooling water systems, feedwater, condenser air extraction, feedwater, and extraction drain systems, turbine seals, and drains, and fuel oil systems.

    6. Needle Valve

    Like most valves, pneumatic needle valves are used to keep the operation of industrial machinery efficient and safe. Similar to the shutoff valves, needle valves regulate, start, and stop the flow rate of fluid within the pipeline through compressed air.

    However, the design of needle valves is different from shutoff valves. Needles valves have a plunger which is a needle-like, long, tapered point at the end of the valve stem. They also have a small handle that takes control of the plunger’s position. The unique design of needle valves is mainly responsible for the precision and accuracy in controlling the flow of fluid in the valve.

    Pneumatic actuated needle valves reduce the flow of fluid in a leg of a pneumatic circuit. Compared to flow control valves, needle valves control flow in both directions that only one path, which makes them bi-directional. A finely threaded stem gradually adjusts the amount of controlled flow passing through the valve.

    Pneumatic Actuator Needle Valve

    Source: Pneumadyne

    Pneumatic needle valves protect delicate gauges which have been damaged due to sudden pressure surges of fluids. These valves are an excellent choice for systems that use lighter materials with low flow rates. Often made from bronze, stainless steel, metal allows, or brass, pneumatic needle valves are also used for high temperature and oxygen-based applications.

    Pneumatic check valves

    Source: Pneumadyne

    7. Check Valve

    Check valves are very simple valves that play a significant role in several pneumatic circuits. Pneumatic actuated check valves function through the airflow. These valves allow free flow in one direction and block flow in the other direction. Pneumatic check valves are widely used in numerous applications, for example, industrial processes which include the fluid system in chemical plants, aerospace processes, and home heating systems

    For them to properly operate, pneumatic check valves have been designed with a specified cracking pressure. These valves are self-automated and are working without electricity, a manual operator, or other controls, so they do not need assistance to open or close. Streamlines, HVAC system, pressure pumps, and vacuum breakers use pneumatic check valves.

    What Are the Applications?

    1. Medical Industry

    Optical control quality of a vials, pharmaceutical factory.Flare light

    The medical industry has distinct ways of using pneumatic systems. Testing samples and cleaning instruments are often a part of the process in this industry. Each equipment must meet the standard quality, safety, and cleanliness established in this industry. Pneumatic valves must not only be manufactured with maximum attention to cleanliness. They must also be reliable since the lives of people are at stake.

    Therefore, pneumatic valves that are made from high quality materials and could withstand extreme temperatures are fit for this high performance and demanding type of application. SIO Pneumatic Actuator Valves boast on its nonhazardous materials which guarantees safety at all times. Through passing the machine safety and explosion protection specifications and standards, SIO Pneumatic valves are guaranteed to be very suitable for industries that require sterile and safe applications, such as the medical industry.

    2. Water Applications

    Aerial top view recirculation solid contact clarifier sedimentation tank

    Industries involving water systems require minimum leakage, water cleanliness, and a specific pressure drop. Pneumatic valves have a tight seal which prevents leakage. These valves also have precise control in the regulation, start, and stop of the fluid flow. SIO Pneumatic valves are highly suitable in low, medium, and high pressures, making it an excellent choice for water applications.

    3. Oil and Gas Industries

    valves used in oil and gas industry

    The oil and gas industries are both demanding in nature, which means that the operations in these industries require stronger and better performing valves. Pneumatic valves play a considerable role in the operations, especially since these industries require the valves’ adaptability and durability to all levels of temperature and pressure. From controlling the flow of the fluids to the refining process of crude oil, high pressure valve designs are needed.

    SIO Pneumatic actuator valves have specific types of valves that are designed to meet the demands and conditions that oil and gas industries have with their operations.

    4. Power Generation Industries

    Gas turbine electrical power plant with twilight

    Power plant industries have crucial operations, which means when one part of the system fails, it may affect the whole process. Power generation processes need valves that are durable and can precisely control the operating conditions of steam and water systems.

    SIO Pneumatic valves have been specially made to match our customer requirements and to help them acquire individual solutions to all their specifications. Its ability to withstand extreme temperatures and its ability to reduce leakage make SIO Pneumatic valves a competent brand for power generation industries. We have a wide range of pneumatic valves and other products that our customers rely on, given our knowledge and experience in the industry.

    What Are the Types of Pneumatic Valves?

    1. Spring Offset

    A spring offset valve is a type of pneumatic valve which is classified based on the manner of how the direction of the airflow has shifted. Like a two-way directional valve, where the valve is either closed or open, enabling or preventing airflow. For the ports to open or close, the actuator positions and budges a valve spool. To release the valve spool, a spring is used to set it free, putting the pneumatic valve in its previous position. This mechanism gave the spring offset valve its name.

    2. Open versus Closed Resting State

    When the actuator that is connected to the valve is not active, two different positions, closed or open are assumed by two-way directional spring offset valves. When the device is in a closed resting state, the flow of air is blocked in the valve. On the other hand, if it is in an open resting state, air can move freely through the valve. In three-way valves, however, one port is always on an open resting state. When such cases occur, the other ports are closed, and they block the air from flowing through the valve. When this happens, the pressure only moves once the device has been turned on.

    3. Two-Way Directional Valve

    In a two-way directional valve, the flow of air has two directions and moves through the two ports, which are either closed or open. When the ports are open, the airflow can move freely from the first port to the second port through the valve, or the other way around. However, the flow of air will not be able to pass through the valve when it is closed.

    4. Three-Way Directional Valve

    As the name implies, three-way directional valves have three ports. Each port has a specific purpose. One of the three ports is an exhaust exit. One hooks the valve up to an actuator, and the other is where the airflow is connected.

    When two ports are opened, it means that the remaining port is closed. When this happens, the air flows through the valve to the device. The exhaust allows air to pass out when two different ports are opened, and the last one is closed. Double-acting cylinders are frequently connected to three-way directional pneumatic valves, or they are linked to a cylinder’s actuators.

    5. Four-Way Directional Valve

    A four-way directional valve is a type of pneumatic valve that has four ports that serve distinct purposes. One port acts as an exhaust pathway. The other one is connected to the pressurized airflow, while the actuators are connected with the remaining two ports.

    In pneumatic systems, four-way directional valves are used since they have specific paths that help the valve in the reversal of the motion of a basic motor or cylinder. When an additional port is connected to the valves, they are now coined as four-way directional valves with five ports. These valves are commonly used when double pressure is required. The added port usually serves as the second exhaust path of the valves.


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