1. Structural design
T-type stop valve: The flow channel inside the valve body is bent at a right angle (similar to the shape of a "T"), and the fluid path is tortuous, resulting in high flow resistance. This structure is suitable for scenarios that require rapid throttling or bypass control (such as low-pressure systems or low-flow medium).
Y-type stop valve: The valve body flow channel and the main flow channel are arranged diagonally (similar to the shape of a "Y"), and the streamlined design reduces the erosion of the sealing surface by the medium, significantly reduces the flow resistance, and is more suitable for high-flow, particle-containing or high-viscosity media.
2. Fluid resistance and applicable scenarios
T-type: The fluid resistance is large, and the opening/closing torque is large. It is suitable for low-pressure, low-flow or systems that allow a large pressure drop (such as water treatment and low-pressure gas pipelines).
Y-type: Small fluid resistance (only 50%~60% of T-type), especially at high flow rate (such as above 3.5 m/s), the performance advantage is obvious, suitable for high temperature and high pressure steam, oil or coking medium in harsh working conditions.
3. Sealing and maintenance characteristics T-type: Traditional straight-through seal has a simple structure and convenient maintenance (valve disc and valve seat are easy to replace), but the sealing surface is easily eroded and worn by the medium, and the service life is relatively short.
Y-type: Adopt conical sealing surface or double seal (such as bellows + packing seal) to reduce impurity deposition and sealing surface wear, can withstand frequent opening and closing and high pressure difference impact, and have a long service life.
4. Space and cost T-type: Compact structure, low installation space requirements, low manufacturing cost, often used in projects with limited budget or space.
Y-type: Large volume, occupying more space, and high cost due to complex flow channel and sealing design, mostly used in key systems with strict performance requirements.
Summary: The T-type stop valve focuses on economy and simple working conditions, while the Y-type is more reliable in high pressure, high flow rate and complex media scenarios by optimizing the flow channel and sealing design.
