Multi-Spring Pneumatic Control Valve, DN20-DN200, A216 WCB

The Pneumatic Diaphragm Three-Way Regulating Valve features a multi-spring diaphragm actuator, cage regulating mechanism, and intelligent integrated locator. Designed for medium streaming and confluence, it comes pre-adjusted for zero and span, ready for use upon connection to a gas source. Made from ASTM A216 WCB, this valve suits sizes 3/4-8 inch (DN20-DN200) and pressure ratings PN16-PN100 (150-600 LB). Ideal for precise flow control in industrial applications, it ensures efficient operation and reliability in sectors such as petroleum, chemical, electric power, and metallurgy.

SPECIFICATIONS
Product Name: Multi-Spring Pneumatic Control Valve
Valve Type: Multi-spring Type
Size Range: DN20-DN200, 3/4 Inch - 8 Inch
Pressure Rating: PN16-PN100, Class 150 LB - 600 LB
Materials: ASTM A216 WCB, SS 304, SS 316, SS 316L
Usage: Regulating type, On-Off type
Air supply pressure (Spring range): 140（20 to 100）Kpa G, 240 (40 to 200) Kpa G, 280 (80 to 240) Kpa G
Connector: Air Pipe Connector: RC1/4
Direct Action: Pressure increase, stem descend, valve close.
Reaction: Pressure increase, stem ascend, valve open.
Input signal: 40 to 20mA.DC(with positioner)
Lag: ≤1%FS(with positioner)
Linear type: 2%FS（with positioner)
Environmental temperature: -10°C to +70°C 
Accessories: E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch, Non-standard accessories, need special customized notes.

Advantages:
1. Compact and Efficient: Features a compact structure, lightweight design, sensitive action, low pressure drop, high allowable pressure, large valve capacity, accurate flow characteristics, and easy maintenance.

2. Versatile Application: Ideal for various conditions, especially in oil industry temperature control systems and automated controls in other industries.

3. Stable and Quiet Operation: Side-guided spool structure ensures stability, reduces vibration and noise, and handles high pressure differences easily.

4. Specific Use Cases: Suitable for diverting applications with low nominal size and pressure difference. For sizes above DN100 and high pressure differences, mixing and diverting valves are not interchangeable.