News
Recent Posts
-
COVNA to Showcase Cutting-Edge Valve Solutions at ROS-GAS-EXPO 2025 in St. Petersburg!2025-09-26/0 Comments -
-
-
-
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.
COVNA's new VX31 3-way brass solenoid valve combines smart design and rugged materials, making it an ideal upgrade for multi-channel fluid systems. Whether you want to divert, switch or mix water, oil or gas, the VX31 provides stable, energy-efficient control with long-lasting durability and outstanding performance.
Product Features
- High-precision three-way structure VX31 adopts equal percentage three-way design, which can flexibly realize fluid distribution and switching, support A→B/C and B→A/C two working modes, and meet the needs of multiple working conditions.
- High-quality brass material The valve body is made of C37700 brass, which is precision cast and processed, with excellent corrosion resistance and mechanical strength to ensure long-term stable operation.
- Quick response The coil drive can operate normally with ±10% voltage fluctuation, the opening time is less than 15ms, and the closing time is less than 20ms, ensuring instantaneous and accurate fluid switching.
- Wide pressure compatibility Supports 12VDC, 24VDC, 24VAC, 110VAC, 220VAC and multiple voltage specifications, which can be flexibly selected according to system requirements.
- Strong pressure bearing capacity The maximum working pressure can reach 1.0MPa (10bar), and the minimum starting pressure is 0bar, which can be opened immediately to meet various working conditions from low pressure to medium pressure.
- Ultra-long service life The coil and valve core are optimized and designed to have a service life of more than 500,000 times, low maintenance cost and high reliability.
- Multiple interface forms Provide G (BSPP), NPT, internal thread, flange and other connection methods for quick integration into existing systems.
Technical Parameters
| Parameter | Specification Range |
|---|---|
| Body Material | C37700 brass |
| Port Size Range | 1/4", 3/8", 1/2", 3/4", 1" |
| Pressure Range | 0 – 1.0 MPa (0–10 bar) |
| Temperature Range | –10 °C to +80 °C |
| Applicable Media | Water, air, oil, gas, light chemical media, etc. |
| Voltage Options | DC 12 V, DC 24 V, AC 24 V, AC 110 V, AC 220 V |
| Protection Level | IP65 |
| Response Time | Opening < 15 ms; Closing < 20 ms |
| Service Life | ≥ 500,000 cycles |
| Connection Types | G (BSPP), NPT, flange, etc. |
Why choose COVNA?
- Professional manufacturing: COVNA has been focusing on the research and development and production of solenoid valves since 2000, and its products have passed ISO9001, TÜV, SGS, RoHS and other certifications.
- Flexible customization: No minimum order quantity limit, support OEM/ODM, and quickly debug according to customer needs.
- Technical support: From selection to installation, debugging, and after-sales, one-stop service ensures that you have no worries.
- Cost-effectiveness: Direct factory quotation, quality comparison is more price competitive.
Consult now to start a new era of automated fluid control! We look forward to working with you to create efficient and reliable intelligent fluid solutions!
As the food processing, pharmaceutical and water treatment industries continue to improve their hygiene standards and quality requirements, the industrial valve market has an increasingly urgent need for products with high reliability, excellent sealing and easy cleaning and maintenance.
COVNA HK60-Q-W electric ball valve adopts advanced design concepts and is designed for food-grade and sanitary environments. Based on a compact structural design and combined with a three-clamp quick connection method, this product achieves efficient disassembly and cleaning, and is an ideal choice for media control such as food, dairy products, and purified water.
Design and material advantages
1. High-quality stainless steel structure
Ensure that the product can maintain excellent performance even in harsh environments. The use of 304 or 316 stainless steel as the valve body material not only ensures corrosion resistance, but also extends service life.
2. Sanitary and safe three-clamp connection
Adopting the internationally accepted three-clamp quick connection method, the product is not only easy to disassemble and clean, but also effectively reduces the risk of cross contamination.
3. Flexible control mode and diverse voltage selection
Not only supports standard on/off control, but also can realize modulating operation, and its rotation control stroke is 90 degrees (quarter turn). The product provides a variety of voltage options, including DC 12V, 24V and AC 24V, 110V, 220V, 380V, etc., to further adapt to the working environment of various control systems.
Technical parameters and application areas
Valve size and pressure range
The product covers a range from 1/2 inch to 4 inches in size, and the working pressure is usually between 1.6 and 6.4MPa, which can meet the application requirements from low pressure to high pressure environment.
Wide range of applicable media
In addition to food, dairy products and drinking water, the valve is also suitable for air, pure water and even other corrosive or high-viscosity fluids, showing extremely high versatility and reliability .
COVNA can also customize materials and laser engrave corporate LOGO according to customer needs to provide customers with personalized solutions.
COVNA adopts a strict quality management system in the production process, and through precision testing and multiple pressure and air tightness tests, ensures that the products meet or even exceed the requirements of international standards such as GB, ANSI and API 598. With a 99.8% product qualification rate and a 5-year quality assurance, HK60-Q-W has won wide recognition and trust in the market.
Ensure that the product can maintain excellent performance even in harsh environments. The use of 304 or 316 stainless steel as the valve body material not only ensures corrosion resistance, but also extends service life.
Adopting the internationally accepted three-clamp quick connection method, the product is not only easy to disassemble and clean, but also effectively reduces the risk of cross contamination.
Not only supports standard on/off control, but also can realize modulating operation, and its rotation control stroke is 90 degrees (quarter turn). The product provides a variety of voltage options, including DC 12V, 24V and AC 24V, 110V, 220V, 380V, etc., to further adapt to the working environment of various control systems.
In addition to food, dairy products and drinking water, the valve is also suitable for air, pure water and even other corrosive or high-viscosity fluids, showing extremely high versatility and reliability .
