The main control valve product names of China Control Valve Network include:JYH941 electric globe valve( buying in globe valve sampleLimit switch ( detector ),Multi-rotary electric actuator,Multi-stage depressurization sleeve control valve,Peumatic diaphragm direct signle seat, double seat control valve

Control Valve Selection Principles

1. Valve Body Type Selection

Select the appropriate valve structure based on media characteristics and process requirements:

Globe valves (single-seat): Suitable for applications requiring strict leakage control

Globe valves (double-seat): Ideal for high differential pressure conditions

Butterfly valves: Best for high flow, low differential pressure media

Ball valves: Excellent for high viscosity or fibrous media

Cage valves: Provide stability in systems with pressure fluctuations

2. Flow Characteristic Matching

Equal percentage: Ideal for frequently changing load conditions (e.g., temperature control)

Linear: Suitable for systems with stable setpoints (e.g., level control)

Quick opening: Primarily used for on-off control applications

3. Actuator Selection 

Pneumatic actuators: Simple structure, explosion-proof, suitable for hazardous environments

Electric actuators: Fast response, convenient for remote control

Hydraulic actuators: High output force, ideal for heavy-load applications

4. Safety Action Modes

Fail-close (air-to-open): Used when media must be cut off during failures

Fail-open (air-to-close): Applied when flow must be maintained during failures

Control Valve Maintenance Essentials

1. Key Inspection Areas

Valve body interior: Check for corrosion and erosion 

Valve trim and seat: Evaluate wear and sealing performance

 Sealing elements: Packing, gaskets, O-rings condition

 Actuator components: Pneumatic diaphragm, electric drive parts

2. Recommended Maintenance Intervals

 Routine checks: Monthly visual inspections and operational monitoring

 Regular maintenance: Comprehensive inspection every 6-12 months

 Shorter cycles recommended for harsh operating conditions

3. Common Failure Prevention

Install filters to prevent clogging 

Include bypass lines for online maintenance

 Implement smart positioners for condition monitoring

 Technical Development Trends

With smart manufacturing advancement, intelligent control valves and bus-type valves are becoming increasingly prevalent. These devices offer remote diagnostics, adaptive calibration, and predictive maintenance capabilities, significantly enhancing system reliability and maintenance efficiency.

 Practical Recommendations

Consider process safety, media characteristics, and economics during selection

 Maintain comprehensive maintenance records documenting each service

 Configure redundant valves or quick-switch devices for critical applications

 Train operators in basic fault diagnosis and handling skills

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

• Self-reliance electric temperature regulator
• Self-reliance flow regulator
• self-reliance micro-pressure regulator
• Self-reliance pressure differential regulator
• Self-reliance pressure regulator
• Self-reliance temperature regulator
• Siemens valve locator

2026-01-26

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