What is a 2/2-Way Solenoid Valve?

A 2/2-Way Solenoid Valve is a basic automation component that uses electromagnetic force to control the flow of fluid. The "2-position" in its name indicates that the valve core has two operating positions (energized and de-energized), while the "2-way" designation refers to the two ports on the valve body (one inlet and one outlet). This solenoid valve uses the magnetic force generated by energizing the solenoid coil to drive the valve core, thereby changing the flow of fluid. A 2/2-way solenoid valve has a simple and compact structure, primarily consisting of a valve body, solenoid coil, valve core, and return spring. It features fast response (typically milliseconds), excellent sealing, and reliable operation. It is widely used in pneumatic and hydraulic circuits in industrial automation control systems, as well as in household appliances, medical equipment, and other applications requiring rapid on/off control of fluids such as water, gas, and oil. When selecting a solenoid valve, consider factors such as orifice size, operating pressure, medium type, and voltage specifications. During operation, ensure the cleanliness of the medium to prevent impurities from causing the valve core to become stuck. Due to its simple structure, low cost, and easy maintenance, the 2/2-way solenoid valve has become one of the most commonly used basic components in the fluid control industry.

Basic Structure and Operating Principle
Structural Components:
Valve Body: Contains the fluid passages and is typically made of brass, stainless steel, or an engineered plastic (such as PTFE). Corrosion resistance depends on the media type.
Solenoid Coil: Generates a magnetic field when energized, actuating the valve core.
Valve Core: Moves via a spring or electromagnetic force, controlling the flow of fluid.

Operating States:
De-energized State (Normally Closed): The spring compresses the valve core, blocking the fluid passage (default closed).
Energized State: The electromagnetic force overcomes the spring resistance, lifting the valve core and allowing fluid to flow from the inlet to the outlet.

Normally Open vs. Normally Closed Designs:
Normally Closed (NC): Defaults to closed, opens upon energization (more common).
Normally Open (NO): Defaults to open, closes upon energization (requires custom design).

Key Features
Fast Response: Actuation times are typically in the millisecond range, making it suitable for high-frequency switching.
Low Power Consumption: Utilizes a pulsed power supply for energy-saving design. Sealing method: Available in soft seals (rubber, for low temperatures and low pressures) and hard seals (metal, for high temperatures and high pressures).
Applicable media: Air, water, oil, steam, etc. (select according to the medium).