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  • China · Xinhui Valve Co., Ltd.

    Phone: 0577-57760066 57760077
    Fax: 0577-57760099
    Website: http://ozarkdirt.com
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    Address: Xiaojingyu Industrial Zone, Qiaoxia Town, Yongjia County, Zhejiang Province
    Extraction check valve H664Y-P55100V
    Extraction check valve H664Y-P55100V

    抽汽止回阀 是利用引进技术,在国外同类产品的基础上,采用目前先进的设计、制造、材料技术、重新开发的完全满足国内 600MW 1000MW 以下发电机组汽轮机抽汽系统需要的阀门产品,技术性能达国际先进水平,为国内外近百家电力企业提供了数百台质优价廉的产品,得到了众多用户的一致好评,已经替代部分进口,为国家节约了大量外汇。 The company's design and production of extraction steam check valve is based on similar foreign products, using the current advanced design, manufacturing, material technology, and re-development to fully meet the domestic extraction of steam turbines of 600MW and below 1000MW. The required valve products have reached the international advanced level in technical performance. They have provided hundreds of high-quality and low-cost products for nearly a hundred power companies at home and abroad, and have been well received by many users. Foreign exchange. 600MW 以下火力发电汽轮机抽汽系统,防止介质或水倒流,对汽轮机水泵等重要设施起到保护作用。 This series of products are mainly used in the steam extraction system of thermal power generating steam turbines below 600MW to prevent the medium or water from flowing backward and protect important facilities such as steam turbine water pumps. 0.5 秒。 The performance requirements are that the valve closes instantly and the closing time is less than 0.5 seconds under abnormal conditions such as pipeline backflow, power failure, and accident .
    抽汽止回阀设计制造检验标准 [ Design and manufacturing inspection standard for extraction check valve ]
    ASME/ANSIB16.34 E101 JB/T3595 Design and manufacturing standards: ASME / ANSIB16.34 , E101 , JB / T3595
    JB/T3595 ASME/ANSIB16.10 GB/T12221 Structure length standard: JB / T3595 , ASME / ANSIB16.10 , GB / T12221
    GB/T12224 ASME/ANSIB16.25 GB/T9113 JB/T79~JB/T82 Welded end or flange standards: GB / T12224 , ASME / ANSIB16.25 , GB / T9113 , JB / T79 ~ JB / T82
    JB/T9092 JB/T3595 ASME/ANSIB16.34 E101 Test acceptance standards: JB / T9092 , JB / T3595 , ASME / ANSIB16.34 , E101
    抽汽止回阀特点 [ Features of Extraction Check Valve ]
    ANSIB16.34 E101 JB/T3595 ,强度及密封性能完全符合标准需要, The design and manufacturing acceptance standard adopts ANSIB16.34 , E101 or JB / T3595 . The strength and sealing performance fully meet the requirements of the standard.
    The vacuum test of the valve under vacuum, the life of the whole machine meets user requirements;
    For different temperatures, the main material is carbon steel or high temperature steel, and the sealing surface is hardfacing with hard alloy;
    The valve disc is designed to be movably connected with the valve rod through the rocker, and can be self-aligned with the sealing surface of the valve to ensure that the sealing surface is consistent;
    The sealing surface of the valve seat is inclined at a certain angle to reduce the closing time, reduce the impact, and protect the equipment itself and the pipeline;
    The valve is equipped with a damping weight, which can balance the dynamic moment of the closing member to prevent the occurrence of non-hammer;
    The internal cavity of the valve adopts a streamlined design, which has a large flow capacity and reduces valve resistance;
    The actuator is a spring-return air cylinder or a hydraulic cylinder, and is relatively independent of the action of the valve closing member. The failure of the actuator does not affect the action of the closing member;
    The inner wall of the cylinder or hydraulic cylinder is coated with a wear-resistant and corrosion-resistant layer, which can increase the life, reduce the action resistance, and make the valve flexible and reliable;
    There is a limit mechanism when the closing part is opened to avoid damage caused by over-opening;
    The actuator is equipped with valve switch position signal output and local indication of valve opening position;
    It can also be designed according to the specific requirements of users.
    用途 及性能规范 [ Application and performance specification of extraction check valve ]
    阀用于电厂或热电厂抽气系统,或其它系统的和水等非腐蚀性介质管道上,防止汽轮机级负荷时汽轮机内的压力突然降低,抽汽管和各加热器内蒸汽倒流进入汽轮机内造成汽轮对片打碎,毁坏汽轮发电机的恶性事故,并防止加热器系统管道泄漏使水从抽汽紧密的关闭,确保在给水加热器出现水位超高时,气动装置部件接到液体逆流信号后,将汽轮机迅速隔开,给汽轮机或抽气系统以最大保护。 H664Y valve is used in the exhaust system of power plant or thermal power plant, or other systems and non-corrosive medium pipes such as water, to prevent the pressure in the steam turbine from suddenly dropping when the turbine stage load, the steam in the extraction pipe and each heater flows back into the turbine Causes the vicious accident of the steam turbine shattering, destroying the steam turbine generator, and prevents the heater system pipeline from leaking and tightly closing the water from the steam extraction, ensuring that when the water level of the feed water heater is too high, the components of the pneumatic device receive After the backflow signal, the turbine is quickly separated to provide maximum protection to the turbine or extraction system.

    Product number
    Pressure Level
    Strength test pressure
    Seal test pressure
    Applicable medium temperature
    Cylinder air source pressure
    H664Y-150Lb
    150Lb
    3.0Mpa
    2.2Mpa
    ≤425
    0.6Mpa
    H664Y-150LbC6
    150Lb
    3.0Mpa
    2.2Mpa
    ≤510
    0.6Mpa
    H664Y-300Lb
    300Lb
    7.5Mpa
    5.5Mpa
    ≤425
    0.6Mpa
    H664Y-600Lb
    600Lb
    15.0Mpa
    10.0Mpa
    ≤425
    0.6Mpa
    H664Y-900LbC6
    900Lb
    24.0Mpa
    18Mpa
    ≤510
    0.6Mpa
    H664H-20
    2.0Mpa
    3.0Mpa
    2.2Mpa
    ≤425
    0.6Mpa
    H664H-50
    5.0Mpa
    7.5Mpa
    5.5Mpa
    ≤425
    0.6Mpa
    H664H-100
    10.0Mpa
    15.0Mpa
    11.0Mpa
    ≤425
    0.6Mpa
    H664Y-64C6
    6.4Mpa
    9.6Mpa
    7.1Mpa
    ≤510
    0.6Mpa
    H664Y-100C6
    10.0Mpa
    15.0Mpa
    11.0Mpa
    ≤510
    0.6Mpa
    H764H-20
    2.0Mpa
    3.0Mpa
    2.2Mpa
    ≤425
    (液压) 0.6Mpa (hydraulic)
    H764H-40
    4.0Mpa
    6.0Mpa
    4.4Mpa
    ≤425
    0.6Mpa
    H764H-64
    6.4Mpa
    9.6Mpa
    7.1Mpa
    ≤425
    0.6Mpa

    气路系统工作原理 [ Pneumatic system working principle ]
            0.4~0.6Mpa ),经过球阀进入二位三通电磁阀,最后经过快排阀进入气缸进气口,止回阀打开。 The air source comes from compressed air (air source pressure 0.4 ~ 0.6Mpa ), enters the two-position three-way solenoid valve through the ball valve, and finally enters the cylinder air inlet through the fast exhaust valve, and the check valve opens. The manual directional valve is used to test the flexibility of the check valve during operation.
    When the check valve is closed, the solenoid valve is de-energized and closed, shutting off the air supply, the quick exhaust valve is activated, the air in the lower cavity of the cylinder is exhausted, and the check valve is quickly closed.
    ASCO 进口产品,也可按用户要求配备其它国内外厂家优质产品,以确保优良的性能和高可靠性。 Control components such as solenoid valves and air treatment components are imported from the United States ASCO according to the requirements of steam turbine manufacturers , and can also be equipped with other high-quality products from domestic and foreign manufacturers to ensure excellent performance and high reliability.
    Structural features
    、密封面堆焊 Cr13 系不锈钢或钴基硬质合金,有良好的耐磨性,密封性能稳定可靠。 1. The sealing surface is welded with Cr13 series stainless steel or cobalt-based hard alloy, which has good wear resistance and stable and reliable sealing performance.
    、当介质正向流动时,气缸下腔进气,与重锤共同作用,合阀瓣平衡地处在全开位置。 2. When the medium is flowing in the forward direction, the lower chamber of the cylinder is fed with air, and it cooperates with the weight to close the valve flap in the fully open position. 0.5 秒内快速关闭。 When the medium flows in reverse, the pressure in the lower cavity of the cylinder piston is quickly released, and the valve flap closes quickly in 0.5 seconds.
    、重锤通过加长杆和拨叉作用于销轴,用以平衡和摇杆的重力矩,防止水锤现象的发生。 3. The heavy hammer acts on the pin shaft through the extension rod and the fork to balance the heavy moment of the rocker and prevent the occurrence of water hammer. When the medium is flowing forward, it helps to open the valve and keep the valve stable and reduce vibration during operation.

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