The Advantages of Flat Gate Valves with Diversion Holes
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In modern pipeline systems, the performance of industrial valves directly affects the efficiency and safety of the system. The flat gate valve with a diversion hole, as a high-performance valve option, has gradually become an important component in industrial pipeline systems with its unique design and superior functions. It not only effectively solves the issues of traditional valves in terms of sealing performance, durability, and ease of operation but also shows significant advantages in handling high-flow media, protecting sealing surfaces, and extending the service life of the valve. This article will delve into the design features, operational advantages, and important roles of the flat gate valve with a diversion hole in different application fields.
The Function and Role of the Diversion Hole
The flat gate valve with a diversion hole incorporates a diversion hole between the valve chamber and the upstream pipeline, a design that plays several key roles in alleviating pressure fluctuations, maintaining stable valve operation, and extending service life.
1. Pressure Regulation
The diversion hole can effectively prevent the expansion of the medium volume in the valve cavity due to temperature changes or chemical reactions. The medium relieves pressure through the diversion hole to the upstream of the valve, maintaining the stability of the system pressure.
2. Reduction of Operating Force
When opening the valve, the design of the diversion hole can reduce the required operating force, making the operation of the valve opening and closing more effortless.
3. Protection of Sealing Surface
The diversion hole also plays a role in protecting the sealing surface, reducing the damage to the sealing surface by the direct impact of the medium, thereby extending the service life of the valve.
The design of the diversion hole ensures that the valve's flow passage remains unobstructed, making it very suitable for high-flow, low-resistance applications such as oil and gas transportation and pigging.
Sealing Performance and Durability
The flat gate valve with a diversion hole excels in sealing performance and durability.
1. Fully Open and Fully Closed States
When the valve is fully open or fully closed, the sealing surface always matches with the valve plate, effectively avoiding the direct impact of the medium on the sealing surface, significantly improving the service life of the sealing surface and the valve.
2. Comparison with Valves without Diversion Holes
Compared with flat gate valves without diversion holes, valves with diversion holes can better protect the sealing surface, as the slot of the gate plate is exposed when the valve without a diversion hole is fully open, making the sealing surface prone to damage.
The flat gate valve with a diversion hole adopts a parallel gate plate design, and the closing piece can be a single gate plate or a double gate plate with a support mechanism, further enhancing the sealing performance and durability.
Structure and Operation
The stainless steel flat gate valve with a diversion hole has the following structural features and operational advantages.
Parallel Gate Plate Design: The closing piece is a parallel gate plate, which can be a single gate plate or a double gate plate with a support mechanism. The pressure of the gate plate against the valve seat is controlled by the medium pressure.
Double Gate Plate Design: For the double gate plate design, the support mechanism can supplement the pressure, ensuring more stable sealing performance.
Sliding Structure: The valve plate slides on both valve seats, suitable for media containing suspended particles. The sealing surface can automatically align, reducing the impact of valve body thermal deformation on the sealing surface.
Temperature Change Adaptability: Even if closed in a cold state, the thermal elongation of the valve stem will not overload the sealing surface. The opening and closing positions of the valve can be controlled by the stroke, and the operational precision requirements are relatively low.
These designs ensure that the valve provides reliable sealing and operational stability in various applications.
Design Features and Applications
The flat gate valve with a diversion hole has the following design features.
Spring Design: A spring is set at the bottom of the valve to ensure that the gate plate automatically yields when closed and rises automatically when opened, preventing the accumulation of debris and avoiding situations where the gate plate cannot be normally opened and closed.
Applicable Media: Suitable for water, oil, natural gas, steam, and other non-corrosive and corrosive media pipeline systems. Particularly suitable for fields such as long-distance oil and natural gas pipelines.
Pigging: The valve design allows for pigging to clean the pipeline, reducing the complexity and cost of maintenance.
Sealing Performance: It adopts a self-sealing packing structure, which does not require frequent adjustment and is reliable in sealing performance. An auxiliary sealing grease injection structure is provided at the packing box to ensure true zero leakage.
In addition, the valve also has a fully enclosed structure with excellent protective performance, suitable for all-weather use requirements. The valve is equipped with an indicator rod or observation window to display the opening and closing state of the valve.
The flat gate valve with a diversion hole has solved some common problems of traditional valves in design and application, such as insufficient sealing performance and poor durability. Its superior sealing performance, easy-to-operate design, and wide applicability make it an emerging product in the valve industry for water supply and drainage. This valve not only extends the service life but also provides a more reliable operational experience, making it an ideal choice for fields such as oil and gas transportation and long-distance pipelines.
