Solenoid valves are critical components in welding and plasma cutting systems, used to electrically control the flow of inert or reactive gases such as nitrogen, argon, or oxygen that are essential for stable arc ignition and clean cuts.
Solenoid valves used in plasma cutters and welding systems deliver fast, reliable actuation that ensures precise timing of gas flow—an essential factor for consistent cut quality and stable weld performance. Their seamless integration with electronic control systems enables fully automated operation, improving process repeatability and reducing operator workload. By maintaining steady, controlled gas delivery, these valves help enhance overall cut and weld quality while minimizing defects. Built‑in fail‑safe configurations, such as normally‑closed designs, add an important layer of safety by preventing unintended gas flow during power loss or system faults. Choosing the right type, voltage, and configuration is essential for optimal performance and longevity.
Common Solenoid Valve Configurations
Normally Closed (NC): Default state is closed; energizing the coil opens the valve. This is the most common in plasma cutters because it prevents gas leakage when the system is off, improving safety and efficiency
Direct-Acting: Operates without pilot pressure; the coil directly moves the plunger to open or close the passage
Proportional/Variable Flow: Used in some advanced systems to adjust gas flow for different cutting speeds or materials
Optimize Your Gas Control
Improve cut quality, weld stability, and safety with application‑specific valve recommendations. Work with our team to define the exact voltage, flow characteristics, and configuration your equipment requires.
Solenoid Valves
The DSV28N series solenoid valves from Deltrol Controls are small 2-way solenoid valves used to control the flow of liquids and inert gases up to 150 psi. They are designed with materials appropriate for potable water, water, and gaseous applications.