Typical applications of process and media valves
Process valves play a vital role in optimizing energy efficiency and extending equipment lifespan by precisely controlling various fluids and media within industrial processes.
At SMC Finland, we offer a diverse range of process valve solutions tailored to various applications:
Media circulation
Process valves offer significant benefits for industrial processes involving media circulation:
- Precise chemical control: Ideal for applications such as analytical technology.
- Non-contact fluid handling: Pinch valves enable fluid management without direct contact.
- Improved compressed air efficiency: Universal media valves optimise performance through effective segmentation.
Liquid mixing
Process valves find widespread application in food industry processes that involve mixing liquids with gas bubbles. These specialised valves, designed with specific features, optimise mixing efficiency.
Industrial media cooling
Electrically actuated valves, designed to control water or other media, are crucial for regulating fluid circulation in industrial cooling processes.
Key applications include:
- Cooling process segmentation: These valves enable the segmentation of industrial cooling systems equipped with thermos chillers, simplifying maintenance procedures.
- Gripper cooling: Media valves precisely control fluid flow for cooling grippers, commonly used in automotive welding processes.
- Tool cooling: Cooling lubricants are effectively managed by media valves to maintain optimal tool temperatures in the machine tool industry.
Spraying and blowing applications
Electrically actuated valves offer precise control for a variety of spraying and blowing applications:
- Irrigation: Ensure efficient water distribution through precise flow control.
- Food Cleaning: Effectively remove food residues for a clean final product.
- Machine Tool Cooling: Specialised valves ensure precise control of cooling lubricants, delivering targeted application through spray nozzles at the tool-workpiece interface.
- Machine Tool Lubrication: Solenoid valves accurately dispense water or oil for fine mist lubrication sprays.
Selecting the right media valve
Choosing the right process valve is crucial for optimal performance. Consider these key factors:
Medium types
The choice of valve materials is crucial and depends on the specific fluid being handled. Here's a brief overview of material compatibility for various fluids:
- Oils (hydrocarbons): Generally non-corrosive to metals. FKM seals are commonly used, while nitrile rubber (NBR) is suitable for hydraulic oils.
- Solvents (acetone, acetates, MEK, alcohols, etc.): Many seal materials are susceptible to degradation by solvents. For optimal performance, PTFE or FFKM is recommended. EPDM may be suitable for specific solvents, such as ethyl alcohol.
- Organic acids (acetic acid or citric acid): Stainless steel is the preferred material. Diluted solutions may be compatible with FKM or EPDM seals.
- Strong inorganic acids (sulfuric acid, phosphoric acid, hydrochloric acid, etc.): Highly corrosive to metals and common seal materials. Fluoropolymer-based technical plastics are necessary for handling these aggressive fluids.
- Peroxide: This medium is commonly used in hygienic cleaning processes. Compatible materials include stainless steel and PTFE. For diluted solutions, FKM is also suitable.
- Ozone: This medium is commonly used in disinfection processes. Compatible materials include stainless steel and PTFE.
If you have any questions about material compatibility or need assistance with valve selection, please consult our fluid control experts.
Fluid viscosity
Viscosity is a measure of a fluid's resistance to flow. Unlike density, which measures mass per unit volume, viscosity measures a fluid's thickness. To select the right valve for your application, consider the fluid's viscosity (e.g., water, oil) and choose between pneumatic or electrically actuated valves.
Differential pressure
When selecting a process valve, it is crucial to consider the maximum differential pressure. This value differs from the maximum system pressure and is a key factor in valve selection.
Backflow or back pressure
If reverse flow is a potential risk, consider incorporating a check valve (also known as a non-return valve).
Valve design
Control valves can be actuated in two main ways: direct actuation and pilot actuation.
- Direct actuation: These valves can be opened without requiring additional fluid pressure.
- Pilot actuation: These valves rely on fluid pressure to operate, so they may require a minimum differential pressure.
Standard valves vs. diaphragm isolation valves
Standard seat or piston valves are suitable for many industrial fluids. However, for highly corrosive substances, diaphragm isolation valves offer superior protection.
To select the optimal valve for your specific application, refer to our comprehensive selection guide.
If you need further assistance, contact our fluid control experts.
