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Straight through flat gate valve

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  • Product Overview

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  • Applicable Condition

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  • Product Characteristics

    Seats - soft and metal

    In the event that the soft seat is damaged,

    The metal-to-metal seal will act as a secondary seal.


    Double block

    When the valve is in the closed position

    And also with equal or no pressure,

    Both spring-loaded seats shut off line pressure

    Both spring-loaded seats shut off line pressure

    Self-relieving chamber


    Straight guide plate gate valve

    Manufactured according to API 6D.


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Structural Characteristics Instructions
Advanced O-ring loading construction Through its simple design and efficient performance, the two O-ring loading floating seats of the flat gate are pressure-energized. This allows for complete sealing of upstream and downstream.
Seat Soft and metal O-ring loaded double O-ring design seats maintain a perfect seal with the gate in both low and high pressure applications. Soft seat inserts help ensure a primary seal at the gate. If the soft seat is damaged, the metal-to-metal seat will act as a secondary seal.
Double block T When the valve is in the closed position and the pressure is equal or no pressure, the two spring-loaded seats can close the line pressure independently of the upstream and downstream pressure. This will create a two-block scene.
Self-relieving chamber Dual ram and discharge plate gate designs may increase cavity pressure due to thermal expansion when in the closed position. When the cavity pressure exceeds the line pressure, the seat is forced off the gate surface, allowing excess cavity pressure to drain into the line. This allows for a balance of pressure between the body cavity and the line.
Metal-to-metal sealing structure The sealing of the seat and plate adopts metal-to-metal design, which is suitable for some special working conditions, such as particle working conditions. This metal-to-metal design helps to extend the service life of the valve.
Secondary sealant injection system Valves 6" and above will be equipped with secondary sealant injection fittings for stem and seat. If the seat insert or stem O-ring is damaged, seat and stem leakage can be prevented by injecting sealant into the joint.
Advanced Mechanical details for expansion doors In high and low pressure applications, expansion gate valves are designed to provide a mechanical seal between the seat and gate. Expansion gate valves do not require line pressure to seal and are recommended for use when a tight mechanical seal is required.
Full spread close In the full spread close position, the segment stop engages the lower body stop and the gate wedges downward to expand the gate and segment to create a tight seal to the upstream and downstream seats. Body cavity exhaust will help provide tight closure.
Intermediate position When operated towards the open position, the gate passes through the wedge Angle of the sector segment. This retracts the assembly, allowing it to slide freely between the seat surfaces.
Fully unfolded open In the fully unfolded open position, the sector stop engages the upper body stop and the gate wedges upward. This extends the segments and gates into the seat, thereby isolating the fluid from the cavity.