Valves with Pneumatic Actuator for Industrial Automation

We offer valves with pneumatic actuators for the automatic control of liquids and gases in industrial processes. We also have ball and butterfly valve assemblies in multiple materials and configurations. Therefore, you will always find the right option for your process. Furthermore, we deliver all of them assembled, calibrated, and tested, ready for installation.

What is a valve with a pneumatic actuator and how does it work?

A valve with a pneumatic actuator is an assembly that combines an industrial valve with a compressed air-driven mechanism. Thanks to this, the valve opens or closes automatically when it receives an air signal, without the need for manual intervention. Therefore, it allows for the automation of flow control in industrial processes with great speed and precision. In addition, when integrated with solenoids and positioners, it becomes a key component of any industrial automation system.

Types of pneumatic actuators: single-acting vs. double-acting

Before choosing your pneumatic assembly, it is important to understand the difference between single and double acting. For example, both use compressed air, but their behavior in the event of an air cut-off is different. Below, we explain each one so you can make the best decision:

• Single-Acting (Spring Return): Compressed air actuates opening or closing in only one direction. In addition, an internal spring returns the valve to its rest position when the air is cut off. Therefore, it is the recommended option when safety requires the valve to return to a defined position in case of supply failure. It also consumes less air than double-acting.
• Double-Acting: Compressed air actuates both the opening and closing of the valve. Therefore, an air signal is required in both directions to operate. Thanks to this, it offers greater operating force and is ideal for larger diameters or higher operating torque. However, in the event of an air cut-off, the valve remains in the last position.

Pneumatic ball valve assemblies: NPT thread and clamp

Below are the available models with NPT threaded and clamp connections. In addition, all feature ISO 5211 mounting for direct coupling without adapters. Therefore, installation is quick and hassle-free:

• NPT Threaded Ball Valve with Pneumatic Actuator: This is the most versatile model for general industrial installations. It is also available in 316 stainless steel for direct installation in pipelines. Therefore, it is the most common option in manufacturing, water, and general industrial processes.
• 3-Way Threaded Ball Valve with Pneumatic Actuator: Allows flow diversion between two outlets with a single actuator. Therefore, it simplifies installation by eliminating the need for two independent valves. It is also ideal for mixing, diverting, and purging process lines.
• Clamp Ball Valve with Pneumatic Actuator: Its clamp connection makes it suitable for hygienic applications in the food and pharmaceutical industries. It also allows for quick disassembly for CIP and SIP cleaning. Therefore, it is the required option in processes that must comply with sanitary standards.
• PVC Ball Valve with Pneumatic Actuator: It is lightweight and highly resistant to chemical corrosion. Therefore, it is ideal for corrosive fluids, water, and low-pressure systems. In addition, its low cost makes it the most efficient option for water and irrigation applications.

Pneumatic ball valve assemblies: ANSI flanged and steam

In addition to threaded models, we have flanged and special versions for steam. Therefore, if your process operates at high pressure or handles steam, you will find the appropriate configuration below:

• ANSI 150 Flanged Ball Valve with Pneumatic Actuator: This is the recommended option for high-pressure systems with flanged connections. In addition, the 316 stainless steel body ensures corrosion resistance. Therefore, it is widely used in petrochemical, energy, and industrial water applications.
• 3-Way ANSI 150 Flanged Ball Valve with Pneumatic Actuator: Combines the robustness of the flanged connection with the versatility of 3 ways. Therefore, it is ideal for high-pressure systems requiring flow diversion or mixing. Likewise, its ISO 5211 mounting facilitates actuator replacement without disassembling the valve.
• ANSI 150 Steam Ball Valve with Pneumatic Actuator: It is specifically designed for handling steam at moderate pressure. Thanks to its reinforced construction, it ensures a tight seal and durability in high-temperature conditions. Therefore, it is the indicated option in power plants, food processing, and processes involving steam.

Pneumatic butterfly valve assemblies: standard seats

Below are the wafer butterfly valve models available with standard seats. Additionally, each seat is recommended for a specific type of fluid, so it is important to choose the correct one for your process:

• Wafer Butterfly Valve EPDM Seat with Pneumatic Actuator: This is the most common option for water, low-pressure steam, and neutral fluids. In addition, the EPDM seat resists temperatures up to 150°C. Therefore, it is widely used in potable water systems, HVAC, and general manufacturing.
• Wafer Butterfly Valve NBR Seat with Pneumatic Actuator: It is ideal for mineral oils, fuels, and petroleum-based fluids. Therefore, it is the recommended option in the automotive and manufacturing industries. However, it is not suitable for hot water or steam.
• Wafer Butterfly Valve Viton Seat with Pneumatic Actuator: Offers the highest chemical resistance among available elastomers. Therefore, it is the preferred seat for acids, aromatic solvents, and hydrocarbons at elevated temperatures. In addition, it resists temperatures up to 200°C.
• Wafer Butterfly Valve Teflon Seat with Pneumatic Actuator: PTFE is chemically inert to almost all fluids. Therefore, it is the most versatile option for demanding chemical and anticorrosive applications. It also complies with FDA food contact regulations.
• Corrosion-Resistant PVC Butterfly Valve with Pneumatic Actuator: It is lightweight and resistant to chemical corrosion. Therefore, it is ideal for corrosive fluids or water in low-pressure systems. In addition, its low cost makes it the most efficient option for water and effluent treatment installations.

Pneumatic butterfly valve assemblies: special versions

In addition to the standard models, we have anticorrosive, high-performance, and hygienic versions. Therefore, if your process operates in extreme conditions or requires compliance with sanitary standards, you will find the appropriate option below:

• Corrosion-Resistant Butterfly Valve with Teflon Disc and Seat and Pneumatic Actuator: Both the disc and seat are made of PTFE, offering maximum protection against highly corrosive fluids. Therefore, it is the required option in the chemical and petrochemical industries with aggressive fluids.
• Stainless Steel Butterfly Valve with Teflon Seat and Pneumatic Actuator: Combines the resistance of the stainless steel body with the chemical versatility of the PTFE seat. It is also compatible with a wide range of industrial fluids. Therefore, it is one of the most versatile options in our collection.
• High Performance Butterfly Valve with Pneumatic Actuator: Its double eccentric design eliminates friction during closing. Thanks to this, it offers a longer service life, better sealing, and reliable operation at high pressures. Therefore, it is the recommended option in petrochemical, energy, and mining.
• Hygienic Clamp 316L Butterfly Valve with Pneumatic Actuator: Complies with DIN and ISO sanitary standards for the food, beverage, and pharmaceutical industries. In addition, its polished interior surface prevents product retention. Therefore, it is suitable for CIP and SIP processes with aggressive cleaning agents.

Complementary accessories for your pneumatic system

In addition to the assembled units, we have all the necessary accessories to complete and optimize your automation system. For example, solenoids are essential for electrically controlling the actuator from a PLC. Likewise, positioners allow for precise modulating control of the valve's position:

• Directional Solenoid Valves (3/2 and 5/2 way): Control the air flow to the actuator from an electrical signal. Therefore, they are the component that connects the control system to the valve. They are also available in single and double coil versions for different control logics.
• Electro-Pneumatic Rotary Positioner: Allows positioning the valve at any point between open and closed using a 4-20 mA signal. Thanks to this, it converts an ON-OFF pneumatic actuator into a modulating control system. Therefore, it is essential in process control valves.
• Limit Switch for Pneumatic Actuator: Indicates the open or closed position of the valve via an electrical signal. It also allows feedback to the control system to confirm that the valve has reached the desired position. Therefore, it is an indispensable safety accessory in critical processes.
• Hand Lever for Manual Emergency Opening: Allows manual operation of the valve in case of air supply failure. It is also installed directly on the actuator without modifying the valve. Finally, it is a recommended safety accessory in processes where continuous availability is critical.

Applications by industry

Our pneumatic assemblies are used in a wide variety of industrial sectors. For example, any process that requires fast and frequent opening and closing is an ideal candidate for this technology. In addition, their intrinsic safety makes them preferred in environments with explosion risk:

• Chemical and petrochemical industry: For controlling corrosive and high-pressure fluids. Therefore, we recommend anticorrosive models with PTFE or Viton seats and double-acting actuators for greater operating force.
• Food, beverage, and pharmaceutical: For sanitary processes with CIP and SIP requirements. Likewise, hygienic clamp models in 316L stainless steel are the required option to comply with DIN, ISO, and FDA standards.
• Potable water and effluent treatment: For the automation of water treatment plants, pumping stations, and distribution systems. Therefore, models with EPDM seats and ductile iron or PVC bodies are the most used in this sector.
• Oil, gas, and energy: For control in process lines with hydrocarbons and steam. In addition, High Performance models with double-acting actuators guarantee the necessary sealing in high-pressure systems.
• General manufacturing: For the automation of process lines with water, air, and industrial fluids. Finally, NPT threaded ball valve models with single effect are the most common due to their low cost and ease of installation.

Why choose CEMATIC?

• More than 33 assembled sets available in stock with immediate delivery throughout the Mexican Republic.
• In addition, we deliver each set calibrated and tested, ready for installation without additional adjustments.
• We also offer free technical advice to select the correct actuator type, effect, and material.
• Likewise, we have all complementary accessories: solenoids, positioners, limit switches, and emergency hand levers.
• Finally, we provide service by phone, WhatsApp, and email with same-day response.