平行双闸板闸阀

闸阀    gete valve

DC6012   平行双闸板闸阀

    DC6012 series parallel double-gate gate valve adopts an open-type structure, with reliable operation and extremely high shut-off performance. It is widely used in emergency shut-off valves, vent valves or large-diameter regulating valves under high temperature and high pressure to extremely low conditions. For example: pipelines and storage equipment for refined oil products, wellhead equipment for oil and natural gas production, pipelines with suspended particles and fiber media, independent steam turbine feed systems, severe high temperature and pressure conditions with particles, etc.

    DC6012系列平行双闸板闸阀采用撑开式结构，动作可靠，因其撑开密封的独特双闸板结构，在高压和低压下均可以实现优异的双向密封性能，扭矩越大，密封越严。在开关过程中，闸板密封面和座圈密封面脱离，减小密封面磨损,延长了阀门使用周期。具有极高的切断性能，广泛用于高温高压到极低条件下的紧急切断阀、放空阀或作为大口径调节阀。比如：成品油的输送管线和贮存设备，石油天然气的开采井口装置以及带有悬浮颗粒、纤维介质的管道，独立的蒸汽涡轮进给系统，带有颗粒的高温高压严酷工况等。

规格

产品说明                                                                                                                                                                           平行双闸板闸阀

Product description                                                                                                                                                        Parallel double gate valves

平行双闸板闸阀结构原理

    执行机构的输出力通过阀杆以垂直向下的力作用于楔形块时，被设计成一定角度的楔形块将垂直向下的力转换成水平方向的作用力，又通过压板作用，水平方向的力分别将二块闸板压住阀座，从而以金属紧密接触方式将流体完全阻断，闸板和阀座表面均硬化处理（堆焊硬质合金、表面喷涂Co-Cr-Ni合金，喷涂WC，硼等），具有自清洁功能，特殊工艺表面硬度最高可达HRC90以上。

Parallel double gate gate valve structure principle

    When the output force of the actuator acts on the wedge block with a vertical downward force through the valve stem, a wedge block designed to a certain angle converts the vertical downward force into a horizontal force, and then acts through a pressure plate. The two gate plates are pressed against the valve seat respectively, so that the fluid is completely blocked by the close contact of the metal, and the surface of the gate plate and the valve seat are hardened (surfacing welding hard alloy, surface spraying Co-Cr-Ni alloy, spray WC, boron, etc.), with self-cleaning function, the surface hardness of special process can reach HRC90 or more.

设计特点

压力自密封阀盖采用高密度纯石墨垫片

保护阀盖的过压力引入压力泄放装置

相对宽大的阀座和阀板

在支杆上有限位装置

阀杆上有防装装置

密封面两端硬度不同，没有较大磨损

阀板STL6，阀座STL12

可支持双向流动

两个推力轴承和铝青铜套管

为旁路管道的可用结构

Design Features

High-density pure graphite gasket for pressure self-sealing valve cover

Guo Yali protecting the valve cover introduces a pressure relief device

Relatively wide seat and disc

Limiting device on the pole

Anti-installation device on the valve stem

The hardness of the two ends of the sealing surface is different, and there is no significant wear

Valve plate STL6, valve seat STL12

Can support two-way flow

Two thrust bearings and aluminum bronze sleeves

Available structure for bypass pipeline

石墨压力自密封结构

压力越大，密封力越高

在高温或者频繁的温度变化情况下，我们建议使用自密封环来代替标准的金属缠绕垫圈，在高温和频率温度循环应用

Graphite pressure self-sealing structure

The higher the pressure, the higher the sealing force

In the case of high temperature or frequent temperature changes, we recommend using a self-sealing ring instead of the standard soft iron gasket, which is used in high temperature and frequency temperature cycling

撑开式阀板组件

Open-type valve plate assembly