The main control valve product names of China Control Valve Network include:Peumatic triple eccentric butterfly valve,Pneumatic diaphragm control valve,Pneumatic diaphragm signle seat, sleeve control valve,Pneumatic diaphragm tee confluence,shunt control valve,Pneumatic fluorine lined cutting off(regulative)butterfly valve,Pneumatic fluorine lined control valve,Pneumatic lock valve,Pneumatic piston adjustable butterfly valve

1. Precision and Response Speed Accessories

Valve Positioner: Considered the "brain" of the control valve. It improves modulation characteristics by using a feedback loop to ensure the valve stem reaches the exact position commanded by the controller, overcoming friction and high-pressure differentials.

Pneumatic Relay (Volume Booster): To reduce transmission time lag in large-volume actuators or long-distance pneumatic lines, relays accelerate the valve’s response speed by significantly increasing the airflow to the actuator.

2. Safety and Fail-Safe Mechanisms

Solenoid Valve: Facilitates automated air circuit switching via electrical signals. In the event of a power failure, the solenoid valve redirects air to move the control valve to a pre-defined fail-safe position.

Pneumatic Lock-up Valve (Air Lock): Should the main air supply fail, this device "locks" the air pressure within the actuator, holding the valve in its last position to prevent process fluctuations.

Air Storage Tank: Acts as an emergency energy reservoir for springless piston actuators. It ensures the valve can still reach its safety position during a total air supply failure.

3. Monitoring and Emergency Override

Limit Switch (Valve Position Switch): These sensors provide remote feedback to the DCS/PLC, indicating whether the valve has reached its fully open or fully closed stroke limits.

Handwheel Mechanism: A critical manual override tool. If the automated controller or power source fails, the handwheel allows operators to manually adjust the valve to maintain production.

4. Air Quality and Pressure Management

Air Filter Regulator: The foundation of any pneumatic system. It purifies the incoming compressed air by removing moisture and debris while regulating it to a stable, consistent pressure.

Conclusion: Why Strategic Selection Matters

The strategic selection of control valve accessories transforms a basic valve into a robust control element. Whether you need millimeter-precision positioning or emergency fail-safe logic, these auxiliary devices ensure your industrial plant operates with maximum uptime and safety.

Do you still need to know or purchase the following control valve products:

• CV3000-HCN low noise cage control valve
• CV3000-HCP balance cage signle seat control valve
• CV3000-HLS small bore signle seat control valve
• CV3000-HMT(HDT) tee confluence(shunt) regulator
• CV3000-HSC cage single seat control valve
• CV3000-HTS single-seat regulating valve
• CV3000-HTSW bellows sealing single seat regulator

2026-01-29

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