Solenoid Valves
The Role of Iron Cores and Bushings in Solenoid Valves Iron cores and bushings are critical components in solenoid valves, ensuring efficient electromagnetic actuation, precise mechanical movement, and long-term reliability.
The iron core (or plunger) is typically made of soft magnetic materials like laminated steel or ferrite, which concentrate magnetic flux when the solenoid coil is energized.
This creates a strong electromagnetic force to pull or push the valve mechanism, enabling rapid and precise fluid flow control.
In direct-acting valves, the iron core directly moves the sealing element, while in pilot-operated valves, it controls pressure differentials to actuate the main valve.
The core’s material and design minimize hysteresis and eddy current losses, improving response time and energy efficiency.
Bushings, often made of brass, stainless steel, or wear-resistant polymers, guide the iron core’s linear motion while reducing friction and wear.
They ensure smooth operation, prevent metal-to-metal contact, and maintain alignment under repetitive cycling. In high-pressure or corrosive environments, bushings also act as protective sleeves, extending the valve’s service life.
