Cooperative working principle
Control link:
PLC/ controller → Solenoid valve electrical signal → compressed air channel switching → pneumatic actuator action (on/off/adjust).
Typical process:
The solenoid valve gets power, switches the gas path, and the compressed air enters the actuator chamber;
The pressure pushes the piston/diaphragm, resulting in mechanical displacement;
After power failure, the solenoid valve is reset, the gas is discharged, and the actuator returns to the initial position (spring return or reverse gas supply).
Core structure design
Solenoid valve section
Valve body type:
Two-position tee (2/3) : Control single acting cylinder (single intake + exhaust).
Two-position five-way (2/5) : Control double acting cylinders (double intake + double exhaust).
Driving mode:
Direct action: small flow direct drive (fast response, suitable for high-frequency operation).
Pilot-operated: air pressure assisted switching (large flow, high pressure scenarios).
Special design:
Explosion-proof coils (ATEX certified) for flammable environments;
Low power consumption (0.5W~1W) to extend battery life;
Manual emergency button (can be forced to change the gas path in case of power failure).
Matching with the actuator
Interface standard: Meets ISO 15407 or NFPA specifications to ensure fast gas connection.
Flow matching: The valve CV value must meet the actuator speed requirements.
Key performance parameters
Voltage compatibility: DC 24V (commonly used in industry), AC 220V (high-power scenario).
Response time: ≤50ms (high speed valve can reach 10ms, affecting the actuator frequency).
Working pressure range: 0.2~1.0MPa (general type), high pressure valve support 10MPa.
Protection class: IP65 (dustproof and waterproof) suitable for harsh working conditions.
Cycle life: ≥10 million times (high reliability industrial design).
Typical application scenarios
Valve automatic control:
Remote opening and closing of oil pipeline ball valve;
Precise flow control of regulating valves in chemical plants.
Mechanical action drive:
Automatic production line clamp cylinder clamping;
Material pushing and positioning of packaging machinery.
Security interlocking system:
Quickly cut off the air supply during emergency shutdown (ESD);
Pneumatic emergency closure of fire valve.
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