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API B367 Gr.C-2 Titanium Pressure Sealed Wedged Gate Valve

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API B367 Gr.C-2 Titanium Pressure Sealed Wedged Gate Valve

The main principle of a self sealing gate valve is to use the pressure difference between the valve seat and the valve to achieve self sealing. The seat of a self sealing gate valve is made of an elastic material with a flange ring structure, while the valve adopts a flange structure that matches the seat. When closing the self sealing gate valve, the valve inserts the flange structure into the flange structure of the valve seat by rotating or moving in a straight line, thereby achieving sealing.

    In the design of pressure sealed gate valves, a closed sealing space is formed between the valve and the valve seat through geometric and fluid mechanics principles. When the valve is closed, the fluid in the space is compressed, forming a high-pressure area that makes the seal between the valve and the valve seat tighter. In addition, the self sealing gate valve also adopts some special structural designs, such as springs, sealing washers, etc., to further improve sealing performance, reduce leakage and loss. Overall, self sealing gate valves adopt an innovative design concept and sealing principle, with high sealing performance and reliability, and are widely used in various fields such as petroleum, chemical, power, metallurgy, etc.

    Structure and working principle

    Self sealing gate valve is composed of valve body, valve cover, valve disc, sealing ring and other components, with a simple structure and long service life. The sealing principle of this valve is to achieve self sealing by utilizing the torsional force between the valve disc and the sealing ring. When the valve is closed, the valve disc will twist against the sealing ring. During the twisting process, the radial deformation between the valve disc and the sealing ring acts on the sealing ring, achieving a self sealing effect.


    1. Good sealing performance: The self sealing valve adopts a special sealing structure, which can effectively prevent medium leakage and has good sealing performance, meeting the needs of various working conditions.

    2. Long service life: Self sealing valves have a simple structure and do not have complex sealing structures and moving parts, resulting in long service life and low maintenance costs.

    3. Easy to use: The self sealing valve is easy to open and close, easy to operate, and suitable for various working conditions.

    4. Wide application range: Self sealing valves are suitable for controlling and regulating the flow of media in industries such as urban water supply and drainage, chemical, petroleum, and medicine.


    Body Material: Carbon steel, Stainless steel, Alloy steel. 
    Normal diameter: 2"~60" (DN50~DN1500).
    Pressure range: 900lbs~2500lbs.
    End connection: RF, RTJ, BW.
    Operation: Handwheel, Gearbox, Electric, Pneumatic, Electro hydraulic actutor, Gas over oil actuator.
    Working temperature: -46℃~+560℃.


    Design and manufacture: API600, ANSI B16.34
    Test and inspection: API598
    Face to face dimensions: ANSI B16.10
    Flanged end: ANSI B16.5, B16.47 SERIES A & SERIES B
    Butt-welding end: ANSI B16.25
    Other standards (DIN, BS, JIS) is also available upon request.

    Additional Features

    The main characteristic of a self sealing gate valve is its reliable self sealing performance. This valve adopts a bidirectional sealing structure, and effectively avoids leakage by designing a reasonable sealing ring and gate shape. In addition, the valve also has good corrosion resistance and can operate stably for a long time in harsh working environments.

    Secondly, the structure of a self sealing gate valve is relatively simple, consisting of a gate body, gate plate, sealing ring, packing, etc. Among them, the gate adopts a flat or wedge structure, which is easy to operate and has low friction when opening and closing. The sealing ring is made of acid alkali resistant and high-temperature resistant materials, ensuring the sealing performance of the gate valve. In addition, fillers can be selected with different materials according to different working conditions.

    Main Components
    pressure sealed gate valve

    NO. Part Name Material
    1 Body B367 Gr.C-2
    2 Gate B381 Gr.C-2
    3 Stem B381 Gr.F-2
    4 Sealing Ring Graphite
    5 Ring S.S
    6 Cover B381 Gr.F-2
    7 Bolt A193 B8M
    8 Nut A194 8M
    9 Packing PTFE/Graphite
    10 Gland B367 Gr.C-2
    11 Gland Flange A351 CF8M
    12 Nut A194 8M
    13 Eyebolt A193 B8M
    14 Yoke B367 Gr.C-2
    15 Stem Nut Copper Alloy
    16 Handwheel Ductile Iron
    17 Lock Nut ANSI 1020


    Self sealing valves are widely used in urban water supply and drainage, chemical, petroleum, pharmaceutical and other industries. In urban water supply and drainage systems, self sealing gate valves can be used for sewage treatment, safe discharge, regulation, and flow control. In industries such as chemical and petroleum, self sealing gate valves can be used to control and regulate the flow rate of media, ensuring the normal operation of production processes. In the pharmaceutical industry, self sealing gate valves can be used for fluid control and regulation in the pharmaceutical production process. In summary, a self sealing gate valve is a valve product with a wide range of applications.