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When selecting an industrial valve, a correct process not only ensures stable system operation but also significantly reduces maintenance costs. This article will provide an in-depth analysis of key factors at each step, including valve type, project specifications, materials, and supplier comparisons, to help you quickly identify the most suitable industrial valve solution.
一. Understanding Common Valve Types
Before purchasing, first understand the basic characteristics and applicable scenarios of each valve type:
- Ball Valve: Excellent sealing, suitable for quick shutoff and frequent opening and closing applications.
- Gate Valve: Low opening resistance, suitable for fully open or fully closed applications.
- Butterfly Valve: Lightweight and compact, suitable for large-diameter, low-pressure systems.
- Check Valve: Automatically prevents backflow, commonly used at pump outlets and in pipe networks for backflow protection.
二. The Impact of Project Parameters on Model Selection
1. Pressure Rating Select the appropriate nominal pressure (PN) or ANSI rating based on the maximum working pressure of the process pipeline.
2. Temperature Range For high-temperature applications, heat-resistant materials (such as alloy steel and silicon carbide) are preferred; for low-temperature applications, pay attention to the brittle temperature.
3. Media Characteristics For corrosive media, choose a corrosion-resistant alloy or lined valve. For media containing solid particles, use a wear-resistant valve seat.
三.Key Points for Material and Seal Selection
- Valve Body Material Carbon steel, 304/316 stainless steel, alloy steel, etc., determined based on the media and temperature requirements;
- Seal Material PTFE is suitable for most corrosive fluids; metal seals are suitable for high temperatures and high pressures;
- Surface Treatment Spraying, galvanizing, or PTFE lining to enhance corrosion resistance and leak prevention;
四.Supplier and Service Comparison
- Product Certifications ISO 9001, API, CE, UL, and other certifications;
- Delivery and Inventory Standard parts are generally delivered in 2–4 weeks; custom parts require coordination with the supplier;
- After-Sales Support Warranty period, on-site installation guidance, and spare parts availability;
Through a comprehensive analysis of valve types, project parameters, materials, and supplier services, you have mastered the core elements of industrial valve selection. Next, download the Covna Industrial Valve Datasheet for detailed technical specifications and recommended models to help you quickly implement your project.
Pneumatic ball valves, as key components in industrial automation control, are widely used in water treatment, chemical, food, pharmaceutical, and other fields. However, many engineers tend to overlook key factors during the selection process, leading to reduced system efficiency or even operational failures. This article will address the three most common mistakes in pneumatic ball valve selection and provide practical advice to help you make an accurate choice.
Mistake 1: Ignoring Media Characteristics
Many people focus solely on caliber and pressure when selecting a pneumatic ball valve, overlooking the media's corrosiveness, viscosity, or particulate content.
Consequences of this error: Mismatched valve body materials can lead to corrosion, blockage, or seal failure.
Solution: Determine the media type before selecting a valve and select the appropriate valve body material (such as stainless steel, PVC, or PTFE seals).
Covna recommends: For corrosive media, prioritize 316 stainless steel ball valves with corrosion-resistant seals.
Mistake 2: Ignoring Actuator Parameters
The actuator for a pneumatic ball valve needs to be matched to the operating pressure, frequency of operation, and control method.
Consequences of Errors: Insufficient or excessive actuator thrust, resulting in sluggish operation or damage.
Solution: Select an appropriate double-acting or single-acting pneumatic actuator based on the system air pressure and valve torque requirements.
Covna Recommendation: Use the Covna Torque Calculator to quickly match actuator models to avoid overload or underactuation.
Mistake 3: Ignoring Control Methods and Signal Feedback
In automation systems, the need for solenoid valve control, position feedback, limit switches, etc. is a key consideration when selecting an actuator.
Consequences of Errors: The system cannot achieve remote control or status monitoring, impacting overall operational efficiency.
Solution: Clarify control requirements and select pneumatic ball valves with solenoid valves, feedback sensors, or intelligent positioners.
Covna Recommendation: For PLC control systems, pneumatic ball valves with feedback sensors and NAMUR interfaces are recommended for precise feedback.
Covna Pneumatic Ball Valve Solutions
Covna offers a variety of pneumatic ball valves, supporting customized materials, interfaces, and control accessories to meet diverse operating requirements. Whether it's high-corrosion, high-frequency operation, or intelligent control systems, we can provide you with professional selection support.
View Covna's pneumatic ball valve products: https://www.china-covna.com/covna_product_menu/pneumatic_valve/
Still struggling to select a pneumatic ball valve? Submit your application requirements and we'll customize a solution for you within 24 hours!
Solution: Select an appropriate double-acting or single-acting pneumatic actuator based on the system air pressure and valve torque requirements.
Solution: Clarify control requirements and select pneumatic ball valves with solenoid valves, feedback sensors, or intelligent positioners.
In industrial automation systems, electric and pneumatic valves are widely used actuators for controlling flow remotely. While they share similar control functions, their operating principles, performance characteristics, and suitable applications differ significantly.
This guide walks you through the core distinctions, helping you make confident choices for your projects.
Different Driving Mechanisms
Electric Valve: Operated via electrical signals, commonly using AC220V, AC110V, or DC24V. Ideal for areas with stable power supply.
Pneumatic Valve: Powered by compressed air, making it suitable for environments where quick action and existing air systems are common.
Selection Tip: If no air source is available, go electric. If rapid actuation is needed, pneumatic is your friend.
Response Speed and Control Accuracy
Pneumatic valves offer faster response times, perfect for frequent switching operations
Maintenance and Cost Overview
| Feature | Electric Valve | Pneumatic Valve |
|---|---|---|
| Installation Ease | High (no air supply) | Moderate (requires air) |
| Maintenance Level | Low | Higher (air system upkeep) |
| Initial Investment | Higher | Moderate |
| Operating Costs | Lower (electric use) | Higher (air compression) |
Application Scenarios
Electric Valves: Chemical plants, HVAC systems, building automation.
Pneumatic Valves: Food & beverage, pharmaceuticals, explosion-risk areas (no electrical sparks).
Safety Note: For hazardous environments, pneumatic valves reduce risk of spark-related incidents.
How Covna Supports Your Selection
Covna offers a wide range of electric and pneumatic valves, including ball, butterfly, and gate types—with custom options to meet your specific needs.
