Industrial fluid diversion control: Directional switching of the pneumatic 3way ball valve

The core pain points of industrial fluid diversion

In a chemical plant in the United States, the feed system of a distillation column needs to divide the raw liquid into two paths and send them to different distillation columns respectively. The original plan used a 2 way valve and manual switching, which had problems such as a deviation of the flow ratio of ±15% and a switching time of 10 minutes per operation.

In process industries such as chemical engineering, water treatment, and energy, distributing a single medium to multiple pipelines or switching the flow direction according to production requirements. The traditional diversion schemes have three major drawbacks:

1. The manual valve responds slowly, and the manual switching process takes a long time. It is also unable to adapt to the rhythm of the automated production line.
2. The 2way valve has a low flow diversion efficiency and requires multiple valves to be used in combination, thereby increasing the risk of leakage and the complexity of control.
3. The accuracy of the ordinary three-way valve is insufficient: The flow channel design is unreasonable, resulting in deviation in the diversion ratio, which affects product quality.

The technical advantages of the Pneumatic 3way ball valve structure

1. L-port (L-shaped flow ) is the core structural type of a 3way valve. It focuses on flow diversion and direction switching, enabling "two paths entering and one path exiting" or "one path entering and two paths exiting" of the flow path switching, thereby avoiding medium mixing (such as temperature switching, different raw material distribution), precise flow diversion (such as multi-path feeding proportion control), and in cases of high pressure or corrosive media.
2.  T-port (T-shaped flow) focuses on achieving medium mixing such as temperature regulation and concentration adjustment, as well as flow distribution (such as simultaneous feeding by multiple devices). It realizes the "two-way input to one-way output" mixing function or the "one-way input to two-way output" distribution function.

Key parameters and stability verification

1.SS304/SS316 valve body, suitable for acidic/alkaline media in chemical and water treatment industries, with excellent corrosion resistance, anti-oxidation, anti-scaling.

2.Pressure rating: PN10/PN16/PN25/PN40, Class 150LB,JIS 10K suitable for low-pressure and medium-high pressure industrial piping systems, 0 leakage seal, meeting industrial-grade stability requirements.

3.The ball and valve seat adopt a floating/fixed structure, ensuring no jamming during long-term operation and with a service life of over 100,000 cycles.

3.Connection method: BSP/NPT threads, facilitating connection and maintenance;Socket Weld, with fewer sealing points, suitable for high-pressure and high-temperature working conditions.

4.Using double-acting/single-acting pneumatic actuators, the double-acting type can achieve two-way precise control (without the need for spring reset), while the single-acting type has a fault-safe function (automatically resetting to the starting position when the air supply is lost); the actuators have a fast response speed (switching completed within 0.5-2 seconds), and are compatible with PLC/DCS automation control systems.