Functions of electric and pneumatic solenoid valves
For your application, SMC's electric and pneumatic solenoid valves are vital, providing ideal solutions for managing single or double-acting actuators, piloting additional valves, or halting air flow in the line.
Discover our selection of electric and pneumatic solenoid valves in the catalog, delivering products and components that enable your equipment and machinery to function. At SMC, we provide utmost flexibility as valves can be tailored to meet your specific requirements.
Different types of electric and pneumatic solenoid valves offered by SMC
Electric and pneumatic solenoid valves are devices that control the flow of fluid (such as oil, water, steam, or air) in hydraulic and pneumatic systems. They can be classified according to their actuation method:
Function of pilot-operated solenoid valves and direct-operated solenoid valves
The valve position is changed by an electrical signal, with choices ranging from direct-operated solenoid valves or pilot-operated solenoid valves, available in configurations with 4/5 ports or 3 ports.
Air operated valves
Air-operated valves achieve the adjustment of the valve position through pilot air.
Mechanical valves
With mechanical valves, the adjustment of the valve position is achieved through an operator or an object that makes contact with the valves.
Moreover, we can categorise the valves based on their number of actuations:
Single valves
Single valves undergo a single actuation, and upon cessation, they revert to a specific position.
Double valves
Double valves possess two actuators and remain in the last position even after actuation stops, until a signal instructs the actuator on the opposite side.
3-port solenoid valves
3-port solenoid valves undergo two actuations, and upon cessation, they revert to the center position.
Ensuring safety with SMC valves in machinery
Valves play a crucial role in safeguarding machines and industrial processes. At SMC, we provide solutions that contribute to the creation of a more secure machine:
Safety valves
SMC quick exhaust safety valves are certified in compliance with the Machinery Directive 2006/42/EC for use in safety systems, following the specifications of ISO 13849-1.
Safe Fieldbus system
Safe fieldbus systems are available for encoded communication between the PLC and the valve block, such as through the PROFIsafe communication protocol. An illustration of a fieldbus system employing PROFIsafe is the SMC EX260 series, offering a compact and easily installable solution.
For designing a safety application, the PneuSAFE SMC software allows you to choose and validate (with TÜV-verified circuits) the most suitable SMC solutions for your application.
Fieldbus system options
Additionally, SMC provides options for fieldbus systems, encompassing encoded communication between PLC and valve manifold. Essential communication protocols include:
- PROFIsafe,
- Ethernet POWERLINK,
- PROFINET,
- EtherNet/IPTM,
- EtherCAT®,
- PROFIBUS DP,
- DeviceNetTM,
- CC-Link,
- CANopen,
- Modbus/TCP
- AS-Interface.
SMC takes an additional step by assisting you in adapting your machines to the Industrial Internet of Things (IIoT).
At SMC, our industrial communication strategy encompasses two elements: providing customers with customised solutions and offering innovative products, including our unique Wireless Fieldbus System and a comprehensive range of IO-Link solutions. This guarantees that your factory enjoys the advantages of intelligent digitalization and automation.
Applications of electric and pneumatic solenoid valves
Applications for electric and pneumatic solenoid valves include:
- Automotive industry (paint applications, tire manufacturing, among others)
- Packaging
- Maintenance operations
- Metal cutting
- Material transport
- Product sorting
- Battery manufacturing
Selecting Electric and Pneumatic Solenoid Valves: What to Consider
When choosing electric and pneumatic solenoid valves, it is crucial to take into account various factors associated with process conditions and the application, such as:
- Valve function and flow rate
- Valve response time and operating frequency
- System operating pressure and flow
- Necessary degree of protection for the valve
- Power supply voltage
- Protection level
- Strain
Moreover, it is essential to consider the customer's requirements, which may involve:
- Preferred electrical connection type: single, multi-pole or fieldbus
- Security
- Installation expansion plans
- Required valve accessories
Also, it is vital to take into account environmental factors to optimise the service life of pneumatic components. Excessive humidity, oil, and particles, for example, can result in failures in industrial processes.
The basis of preventive maintenance for pneumatic systems involves enhancing the quality of compressed air, adhering to the advice of specialists.
Utilise our valve manifold configurator and other accessible engineering tools to effortlessly design your customized valve manifold with minimal effort.
Seek advice from our experts whenever you have questions or uncertainties about our valves. They are available to assist you in either Finnish or English.
