Unox Çok Yaylı 2 Yollu Pnömatik Kontrol Vanası

What is a Multi-Spring 2-Way Pneumatic Control Valve?

A Multi-Spring Pneumatic Control Valve is a type of valve that uses multiple springs to regulate the flow of fluid through the valve. These valves are commonly used in process control applications to manage the flow of liquids such as water, steam, or gas in pipelines.

The valve consists of a body, valve plug, and a series of springs. The valve plug is connected to a stem that extends outside the valve body and is used to actuate the valve. Springs are arranged around the body and apply force to keep the valve plug in a specific position.

The position of the plug is controlled by the pressure of the fluid acting on it and the force of the springs. When the fluid pressure exceeds the spring force, the plug moves to open the valve and allow flow. When the pressure is lower than the spring force, the plug moves back and closes the valve, stopping the flow.

Where Are Multi-Spring 2-Way Pneumatic Control Valves Used?

These valves are widely used in applications such as:

• Oil and gas production

• Chemical processing

• Power generation

• Water treatment systems

They are known for their reliability and precise flow control. The spring force can be adjusted by changing the spring constant or the number of springs, allowing the valve to be fine-tuned for different flow rates and pressure ranges.

What is the On-Off Operating Principle of a Pneumatic Control Valve?

The On-Off control principle refers to a control system where the valve is either fully open or fully closed — with no intermediate positions. This principle is commonly used in systems that require simple, binary control actions.

A classic example is a thermostat that controls a heating or cooling system. When the set temperature is reached, the thermostat turns the system on or off accordingly to maintain that temperature.

On-Off control systems are simple to design, easy to implement, and cost-effective for many industrial processes that do not require modulating control.

Technical Specifications of the Multi-Spring 2-Way Pneumatic Control Valve

• Product: Multi-Spring 2-Way Pneumatic Control Valve (with optional metal bellows)

• Sizes: DN15 / DN20 / DN25 / DN32 / DN40 / DN50 / DN65 / DN80 / DN100 / DN125 / DN150

• Application: Pressurized steam and thermal oil lines

• Connection Standard: Flanged (DIN1092-2)

• Optional: Class IV (Metal-to-Metal Sealing)

• Function: Diverting / Mixing

• Pressure Rating: PN16 – PN25

• Fail-Safe Position: Normally Closed / Normally Open

• Leakage Class: CLASS VI (PTFE Soft Sealing)

• Max. Operating Temperature: 220 °C

• Stem Sealing: V-Ring + PTFE + Graphite Packing

• Characteristic: On-Off

Material Specifications

• Body: GGG – 40.3 Ductile Iron

• Bonnet: GGG – 40.3 Ductile Iron

• Neck Connector: ST44-3 (S275J0)

• Seat: 1.4571 Stainless Steel (AISI 316)

Note: For DN100, DN125, and DN150, body material in PN16 is Cast Iron.

Available Accessories

• Limit Switch Box – Available upon request

• Manual Override – Available upon request