Z61H承插焊闸阀的启闭件是闸板，闸板的运动方向与流体方向相垂直，闸阀只能作全开和全关,不能作调节和节流。闸板有两个密封面,常用的模式闸板阀的两个密封面形成楔形、楔形角随阀门参数而异,通常为50,介质温度不高时为2°52’。楔式闸阀的闸板可以做成一个整体，叫做刚性闸板；也可以做成能产生微量变形的闸板,以改善其工艺性,弥补密封面角度在加工过程中产生的偏差,这种闸板叫做弹性闸板。

       闸阀关闭时,密封面可以只依靠介质压力来密封,即依靠介质压力将闸板的密封面压向另一侧的阀座来稳定密封面的密封，这就是自密封。大部分闸阀是采用强制密封的,即阀门关闭时，要依靠外力强行将闸板压向阀座,以稳定密封面的密封性。

       闸阀的闸板随阀杆一起作直线运动的，叫升降杆闸阀亦叫明杆闸阀。通常在升降杆上有梯形螺纹，通过阀门顶端的螺母以及阀体上的导槽，将旋转运动变为直线运动,也就是将操作转矩变为操作推力。开启阀门时，当闸板提升高度等于阀门通径的1：1倍时，流体的通道完全畅通，但在运行时，此位置是无法监视的。实际使用时，是以阀杆的顶点作为标志，即开不动的位置，作为它的全开位置。为考虑温度变化出现锁死现象,通常在开到顶点位置上,再倒回1/2－1圈,作为全开阀门的位置。因此,阀门的全开位置，按闸板的位置即行程来确定。有的闸阀,阀杆螺母设在闸板上，手轮转动带动阀杆转动,而使闸板提升,这种阀门叫做旋转杆闸阀或叫暗杆闸阀。

Z61H承插焊闸阀

Z61H承插焊闸阀型号含义解析

型号“Z61H”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）。在此特指承插焊。

· 1： 代表结构形式为明杆模式闸板（Ming Gan Zhi Ban Shi），但通常对于此类小口径焊接闸阀，更常见的是暗杆设计（阀杆只旋转不升降）。在实际中，Z61H常被默认为暗杆承插焊闸阀。

· H： 代表密封面材料为合金钢（He Jin Gang），通常指阀座密封面采用不锈钢或铬钼钢等，具有比碳钢更好的耐腐蚀和耐高温性能。

因此，Z61H 表示一种承插焊连接、合金钢密封的闸阀。

Z61H承插焊闸阀产品简介

Z61H承插焊闸阀是一种阀体通道两端采用承插焊（Socket Weld）连接的闸阀。它是一种结构非常紧凑、连接强度高、密封性能好的小型切断阀。承插焊连接通过将管道插入阀门的承插口后进行四周角焊来实现，比螺纹连接更稳定，又比对接焊更容易对准和焊接，特别适用于小口径（通常为DN50以下）、高压、不允许泄漏的苛刻工况。

Z61H承插焊闸阀主要特点

1.Z61H承插焊闸阀高强度的长久性连接： 承插焊连接提供了与管道近乎一体的高强度连接，抗振动和抗疲劳性能很好，消除了螺纹连接可能松动的风险，密封稳定性极高。

2. Z61H承插焊闸阀很好的密封性能： 密封面采用合金钢材料，具有良好的耐腐蚀和耐磨性，能稳定阀门在高压下的长期有效密封。

3.Z61H承插焊闸阀结构紧凑： 设计紧凑，体积小，重量轻，非常适合在空间受限的管道布局中安装。

4.Z61H承插焊闸阀抗振动性好： 焊接连接使其能够承受强烈的机械振动和压力波动，不会因振动而泄漏。

5.Z61H承插焊闸阀安装便捷性优于对焊： 管道插入承插口的设计便于安装时的对中和固定，比需要确切坡口准备和对中的对焊更容易施工。

Z61H承插焊闸阀适用工况与领域

· 工况： 高压、高温（取决于阀体材料）、有振动或热循环的工况。常见于仪表管嘴、小口径高压管道。

· 介质： 蒸汽、油品、水、天然气及其他对密封性要求高的介质。

· Z61H承插焊闸阀应用领域：

  · 石油化工： 炼油装置、化工厂的高压小口径管线。

  · 电力工业： 电站的高压取样、仪表引压管。

  · 船舶制造： 船用高压管路系统。

  · 其他要求连接稳定的小口径关键场合。

Z61H承插焊闸阀注意事项

· 承插焊连接属于长久性或半长久性连接，拆卸维护时需要切割，不如螺纹或法兰阀门方便。

· 焊接时需注意阀内件（如密封座）的散热保护，防止因焊接高温导致退火或变形。

Product Overview of Z61H Socket Weld Gate Valve

Model Designation Interpretation

The model"Z61H" follows 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. In this context, it specifically refers to Socket Weld.

· 1: Structurally, it implies an Outside Screw  Yoke design. However, for such small-bore weld-end gate valves, a Non-Rising Stem design is far more common. In practice, "Z61H" is often understood as a socket weld gate valve with a non-rising stem.

· H: Signifies the sealing surface material is Alloy Steel (typically meaning stainless steel  chrome-molybdenum steel), offering better corrosion  temperature resistance than carbon steel.

Therefore, Z61H denotes a Socket Weld End, Alloy Steel Sealed Gate Valve.

Product Introduction

The Z61H Socket Weld Gate Valve is a compact,high-strength,  leak-tight small-bore shut-off valve with socket weld ends. The socket weld connection is achieved by inserting the pipe into the valve's socket  then applying a fillet weld around the hub. This connection is more reliable than threaded connections  easier to align  weld than butt weld connections. It is particularly suitable for small-bore (typically under DN50), high-pressure,  critical services  leakage is unacceptable.

Main Features

1. High-Strength Permanent Connection: The socket weld provides a high-strength, near-integral connection with the pipeline, offering excellent resistance to vibration  fatigue. It eliminates the risk of loosening associated with threaded connections, ensuring superior sealing reliability.

2. Excellent Sealing Performance: The alloy steel sealing surfaces provide good corrosion  wear resistance, guaranteeing long-term effective sealing under high pressure.

3. Compact Structure: The design is compact, with small dimensions  light weight, making it ideal for installation in space-constrained piping layouts.

4. Good Vibration Resistance: The welded connection enables the valve to withstand severe mechanical vibration  pressure pulsations without leakage.

5. Easier Installation than Butt Weld: The pipe-into-socket design facilitates alignment  fixing during installation, making it easier to implement than butt welding, which requires precise bevel preparation  alignment.

Suitable Services  Applications

.Service Conditions: High pressure, high temperature (depending on body material), applications with vibration  thermal cycling. Commonly used for instrument connections  small-bore high-pressure pipelines.

· Media: Steam, oil, water, natural gas,  other media requiring high sealing integrity.

· Application Fields:

  · Petrochemical Industry: High-pressure small-bore lines in refineries  chemical plants.

  · Power Generation Industry: High-pressure sample connections  instrument impulse lines in power stations.

  · Shipbuilding: Marine high-pressure piping systems.

  · Other critical small-bore applications demanding absolute connection reliability.

Key Considerations

· Socket weld connections are permanent  semi-permanent. Disassembly for maintenance requires cutting, making them less convenient than threaded  flanged valves.

· During welding, heat sink protection for internal parts (like the seat) is crucial to prevent annealing  deformation caused by welding heat.

核心术语中英对照：

· Z61H承插焊闸阀：Z61H Socket Weld Gate Valve

· 承插焊：Socket Weld (SW)

· 角焊：Fillet Weld

· 承插口：Socket Hub

· 暗杆设计：Non-Rising Stem (NRS)

· 合金钢密封：Alloy Steel Seal

· 长久性连接：Permanent Connection

· 抗振动性：Vibration Resistance

· 热循环：Thermal Cycling

· 仪表引压管：Instrument Impulse Line