Z63对焊闸阀适用于公称压力42MPa，工作温度425℃，工作介质为水、蒸汽、油品和非腐蚀气体的管路上作启闭装置用，尤其适用于火电厂汽机真空冷凝系统和油田热采管线。

     Z63对焊闸阀产品特点：

   1、S/Z型系列采用双闸板双向弹性密封、启闭灵活、迅速、密封稳定
   2、产品结构简单、紧凑合理、检修方便、使用寿命长
   3、在管路上作启闭装置用，必须处于全开或全闭状态，不得用于调节流量
   4、阀门连接方式有法兰和焊接两种，驱动方式为手动和电动。

Z63对焊闸阀

Z63对焊闸阀型号含义解析

型号“Z63”遵循中国阀门型号编制标准（JB/T 308），其含义如下：

· Z： 代表闸阀（Zha Fa）。

· 6： 代表连接形式为焊接连接（Han Jie）。

· 3： 代表结构形式为暗杆模式闸板（An Gan Shi）。阀杆只旋转，不升降。

因此，Z63 明确表示一种对焊连接、暗杆模式的闸阀。型号末尾未标注密封面材料代号，通常表示密封副由阀体材料直接加工而成，或为基本配置的合金密封。

Z63对焊闸阀是一种阀体通道两端采用对焊连接的暗杆闸阀。其核心特点是结构高度紧凑，焊接连接强度高、密封稳定。由于采用暗杆设计，其启闭高度在操作过程中保持不变，非常适合安装空间受限的管道位置。这种阀门是一种持久性或半持久性的切断装置，广泛应用于小口径、高压、高温或对泄漏要求极严的苛刻工况。

Z63对焊闸阀主要特点

1.Z63对焊闸阀稳定的焊接连接： 对焊连接使阀门与管道融为一体，强度高，无任何潜在的泄漏点，特别适用于高压、危险介质和剧烈振动的工况。

2. Z63对焊闸阀结构紧凑，安装空间小： 暗杆设计使得阀门在启闭时整体高度不变，所需安装空间远小于明杆闸阀，非常适合管道密集或空间有限的场合。

3. Z63对焊闸阀的密封性能： 对焊连接本身提供了稳定的体部密封。阀座密封可根据介质要求配置软密封或金属密封，确保阀门本体的切断稳定性。

4. Z63对焊闸阀耐高压与高温： 焊接连接能很好地承受管道应力，阀体多采用锻钢制造，具有良好的耐压和耐温性能。

5. Z63对焊闸阀操作扭矩相对较小： 暗杆闸阀的闸板重量由阀盖支承，不作用于阀杆螺纹，因此开启力矩相对较小。

适用工况与领域

· 工况： 高压、高温、易燃、易爆、有毒介质，或存在热循环、机械振动的关键管路。

· 介质： 石油、天然气、蒸汽、化工介质等。

· Z63对焊闸阀应用领域：

  · 石油化工： 装置内的高压小口径工艺管线。

  · 油气输送： 集输管网的支线或仪表根部阀。

  · 电力行业： 电站的高压仪表管线和辅助系统。

  · 其他： 任何要求连接稳定、空间受限的场合。

Z63对焊闸阀注意事项

· Z63对焊闸阀对焊连接属于持久性连接，拆卸维护需切割管道和阀门，不如法兰或螺纹阀门方便。

· Z63对焊闸阀焊接时需要高超的技艺，并需对阀内件（如密封圈）进行散热保护，防止焊接高温损坏内部零件。

Product Overview of Z63 Butt Weld Gate Valve

I. Model Designation Interpretation

The model"Z63" complies with the Chinese valve model designation standard (JB/T 308), with the following meaning:

· Z: Stands for Gate Valve.

· 6: Indicates the connection type as Weld End (specifically butt weld).

· 3: Denotes the structure type as Non-Rising Stem (NRS). The stem rotates but does rise.

Therefore, Z63 explicitly refers to a Butt Weld End, Non-Rising Stem Gate Valve. The absence of a final letter for the sealing material typically indicates that the sealing surfaces are integral to the body material represent a basic alloy seal configuration.

Product Introduction

The Z63 Butt Weld Gate Valve is a non-rising stem gate valve with butt weld ends.Its key features are its highly compact structure the superior strength absolute leak-tightness of the welded connection. Due to the non-rising stem design, its overall height remains constant during operation, making it ideal for installations space is constrained. This valve serves as a permanent semi-permanent shut-off device, widely used in demanding applications involving small bore sizes, high pressure, high temperature, leakage is absolutely unacceptable.

Main Features

1. Absolutely Reliable Welded Connection: The butt weld connection integrates the valve with the pipeline, offering high strength eliminating potential leak paths. It is particularly suitable for high-pressure, hazardous media, services with severe vibration.

2. Compact Structure, Minimal Installation Space: The non-rising stem design means the valve's overall height does change during operation, requiring significantly less installation space compared to OS&Y gate valves. This is perfect for cramped densely packed piping arrangements.

3. Excellent Sealing Performance: The butt weld itself provides a reliable body seal. The seat seal can be configured as soft seal metal seal based on media requirements, ensuring reliable shut-off.

4. High Pressure Temperature Resistance: The welded connection withstands pipeline stresses effectively. The body, often forged steel, offers good pressure temperature capabilities.

5. Relatively Low Operating Torque: In NRS designs, the gate weight is supported by the bonnet does act on the stem threads, resulting in a relatively lower opening torque.

Suitable Services Applications

.Service Conditions: High pressure, high temperature, flammable, explosive, toxic media, critical pipelines subject to thermal cycling mechanical vibration.

· Media: Crude oil, natural gas, steam, chemical media, etc.

· Application Fields:

 · Petrochemical Industry: High-pressure small-bore process lines within units.

  · Oil & Gas Transmission: Branch lines instrument root valves in gathering networks.

  · Power Generation: High-pressure instrument lines auxiliary systems in power plants.

  · Others: Any application demanding absolute connection reliability space is limited.

Key Considerations

· Butt weld connections are permanent. Disassembly for maintenance requires cutting the pipe valve, making it less convenient than flanged threaded valves.

· Welding requires skilled technique heat sink protection for internal parts (e.g., seals) to prevent damage welding heat.

Z63对焊闸阀核心术语中英对照：

· Z63对焊闸阀：Z63 Butt Weld Gate Valve

· 对焊连接：Butt Weld End (BWE)

· 暗杆模式：Non-Rising Stem (NRS)

· 结构紧凑：Compact Structure

· 安装空间：Installation Space / Envelope

· 持久性连接：Permanent Connection

· 热循环：Thermal Cycling

· 机械振动：Mechanical Vibration

· 根部阀：Root Valve

· 散热保护：Heat Sink Protection