ZJHN Pneumatic Double Seat Control Valve
Product Overview
The ZJHN Pneumatic Double Seat Control Valve is a high-performance valve designed for precise flow control in a variety of industrial applications. Its dual-seated diaphragm design ensures excellent stability, high flow accuracy, and reliable performance under various operational conditions. Featuring a durable and corrosion-resistant material construction, it is ideal for handling aggressive fluids, chemicals, and high-temperature environments.
Key Features:
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Flow Characteristics: Provides a wide adjustable range, excellent flow control, and high precision, making it suitable for complex applications.
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Durability: The valve is equipped with multiple sealing options, offering a robust design that resists wear, corrosion, and pressure-induced damage.
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Versatility: Available in various actuator configurations and diaphragm sizes to suit different system requirements.
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Sealing Performance: Available in bellows seal or high-temperature heat types for added protection against leakage and extreme conditions.
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Easy Installation: Designed to be easily integrated into existing systems with standard flange connections.
| Parameter | Value | Standard |
|---|---|---|
| Size Range | DN20 – DN200 | GB/T 9113 |
| Pressure Rating | PN16, PN40, PN63, PN100 | GB/T 12221 |
| Temperature Range | -196°C to 450°C | Special versions |
| Flow Characteristics | Linear, Equal Percentage | IEC 60534-4 |
| Max Cv Value | 630 (DN200) | IEC 60534-2-1 |
| Actuator Type | Multi-spring diaphragm | IEC 60534-6 |
| Body Materials | ZG230-450, 304SS, 316SS, Hastelloy | ASTM A351 |
Flow Capacity (Cv Values)
| DN (mm) | Linear Cv | Equal % Cv | Actuator Model | Travel (mm) |
|---|---|---|---|---|
| 20 | 6.9 | 6.3 | ZHB-22 | 16 |
| 25 | 11 | 10 | ||
| 40 | 27 | 25 | ZHB-23 | 25 |
| 100 | 176 | 160 | ZHB-34 | 40 |
| 200 | 690 | 630 | ZHB-45 | 60 |
Installation Dimensions (mm)
| DN | Length (L) | Height (H1) | Weight (kg) | Pressure Class |
|---|---|---|---|---|
| 20 | 150/230 | 155/165 | 24/27 | PN16/40 vs PN63/100 |
| 100 | 350/430 | 260/270 | 88/109 | PN16/40 vs PN63/100 |
| 200 | 600/650 | 420/430 | 260/305 | PN16/40 vs PN63/100 |
Applicated Environment
The ZJHN Pneumatic Double Seat Control Valve is widely used in industries such as:
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Chemical Processing: For controlling the flow of corrosive and abrasive chemicals.
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Oil & Gas: Ideal for managing the flow of gas and oil under high-pressure conditions.
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Pharmaceuticals: Ensures precise control in critical pharmaceutical processes.
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Water Treatment: Provides reliable performance in water treatment facilities for effective flow management.
Industrial Usage
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Control in Complex Systems: With the ability to handle high-pressure, high-temperature, and slurry-heavy systems, the ZJHN valve is suited for harsh industrial environments.
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High-Temperature Applications: The heat-resistant design ensures longevity and reliability in systems dealing with fluctuating high temperatures.
Why Choose Double Seat Design?
vs. Single Seat Valves
- ◉ 40% higher flow capacity
- ◉ Balanced forces reduce actuator load by 50%
- ◉ Suitable for higher ΔP applications
vs. Cage-Guided Valves
- ◉ No cage clogging in slurry services
- ◉ Lower maintenance requirements
- ◉ Better stability in vibration environments