Three way switching valve

‌三通切換閥technical Analysis and Application Guide‌

‌1、 Product Definition and Core Features
Basic Definition
A three-way switching valve is a pipeline control device that achieves medium diversion, merging, or flow direction switching by changing the position of the valve core. It is widely used for multi-directional material control in industrial processes.
Key characteristics
Wear resistant design: Using structural ceramic sealing pairs (such as alumina ceramics), it has strong erosion resistance and is suitable for high wear media such as dry ash and slag slurry.
Bidirectional sealing: The split type double gate structure has zero leakage in both directions when closed, and the gate rotates with self-cleaning function during the opening and closing process.
Flexible configuration: Supports pneumatic/electric drive, optional blowing port or automatic blowing system to prevent dust accumulation and jamming.

‌2、 Typical Structure and Working Principle
Structural composition
Valve body: DN250 and other diameter specifications, made of cast steel or stainless steel.
Valve core type: L-shaped (flow direction switching) or T-shaped (diversion/merging).
Drive components: pneumatic actuators (such as spring return type), solenoid valves (such as ASCO 8320 series).
Workflow
By using external control signals (air pressure/current) to drive the valve core to rotate or translate, the flow direction of the medium is switched.
In the high-pressure/low-pressure dual channel system, pressure detection can be automatically switched (refer to the hydraulic test valve case).
3、 Industry application scenarios
Special requirements for industry application cases
High temperature resistant and anti caking design for three-way diversion of raw materials/coal powder in cement production
High frequency operation life of power ash and slag pipeline switching ≥ 100000 times
Material of corrosion-resistant valve body for controlling the flow direction of tailings slurry in mine transportation
4、 Selection and maintenance points
Selection parameters
Pressure range: 1-38 kilograms (to match the working pressure)
Medium characteristics: particle size, temperature, corrosiveness
Connection method: flange/thread (such as NPT interface directly connected to pipeline)
Common fault handling
Leakage issue: Check for wear on the sealing ring or tightness of the valve body bolts.
Switching blockage: Clean the dust accumulation in the valve chamber and check if the air source pressure is ≥ 0.4MPa.
Maintenance procedures
Regularly check the wear of the valve plate (cement plants recommend stopping every 500 hours for inspection).
Lubricate rotating components and keep the blowing system unobstructed.
5、 Manufacturer and Extended Information
Recommended brands: Tianjin Yibiao Valve (Pneumatic), ASCO (Electromagnetic Three way Valve).
Technical consultation: You can directly contact the first standard manufacturer to obtain DN250 ceramic valve drawings or pressure curve data.