锻造法兰闸阀

锻造法兰闸阀是一种通过闸板（楔式或平行式）的垂直升降运动来开启或切断管道中介质流动的阀门。其阀体采用锻造工艺制造，并通过法兰与管道系统连接。这种阀门以其出色的结构强度、很好的密封性能和高稳定性，被广泛应用于石油、化工、电力、冶金、水利等工业领域的高温、高压、大口径或对安全性要求极高的关键管路上，作为稳定的切断装置使用。

锻造法兰闸阀主要特点

1. 锻造法兰闸阀结构坚固耐用：阀体采用锻造工艺，材料致密，晶粒流线合理，能承受更高的压力和冲击载荷，机械性能远优于铸造阀体。

2. 锻造法兰闸阀优良的密封性能：通常采用硬质合金或堆焊硬质材料密封副，密封面耐磨、耐腐蚀，使用寿命长。关闭时，依靠介质压力将闸板紧紧压在阀座上，实现双向密封或单向密封（取决于设计）。

3. 流阻系数小：阀门在全开时，介质通道直通，流阻极小，几乎不产生压力降，节能效果好。

4. 锻造法兰闸阀适用范围广：可适用于水、蒸汽、油品、硝酸、醋酸、强氧化性介质等多种流体。根据介质特性，可选择不同的材质（如WCB、WC6、WC9、304、316、蒙乃尔合金等）。

5. 锻造法兰闸阀多种操作方式：可根据需要配备手轮、齿轮箱、电动、气动或液动执行机构，实现远程控制或自动化操作。

结构形式

· 锻造法兰闸阀闸板类型：楔式单闸板、楔式双闸板、平行式双闸板。

· 阀杆类型：明杆结构（阀杆随闸板升降而上下移动，易于观察阀门状态）和暗杆结构（阀杆只旋转不升降，启闭高度固定）。

· 锻造法兰闸阀连接方式：法兰连接标准可根据用户要求采用国标（GB）、美标（ANSI）、德标（DIN）、日标（JIS）等。

锻造法兰闸阀典型应用

· 石油和天然气的长输管线。

· 电站的高压给水系统和蒸汽系统。

· 化工装置中的腐蚀性介质管路。

· 城市供水、供热的主干线。

Product Overview of Forged Steel Flange Gate Valve

I. Product Introduction

A Forged Steel Flange Gate Valve is a type of valve designed to start  stop the flow of media in a pipeline through the vertical lifting movement of a gate(wedge  parallel type). Its body is manufactured using a forging process  is connected to the piping system via flanges. Renowned for their excellent structural strength, superior sealing performance,  high reliability, these valves are widely used in critical pipelines within industries such as petroleum, chemical, power generation, metallurgy,  water conservancy. They are specifically chosen for applications involving high temperature, high pressure, large diameters,   utmost safety is required, serving as reliable shut-off devices.

Main Features

1. Robust  Durable Structure: The valve body, produced by forging, has dense material  a rational grain flow, enabling it to withstand higher pressures  impact loads. Its mechanical properties are far superior to those of cast bodies.

2. Excellent Sealing Performance: Typically equipped with hard alloy  hard-faced sealing pairs, the sealing surfaces are wear-resistant  corrosion-resistant, ensuring a long service life. When closing, the medium pressure forces the gate tightly against the seat, achieving bidirectional  unidirectional sealing (depending on design).

3. Low Flow Resistance Coefficient: When fully open, the valve provides a straight-through flow path with minimal flow resistance  almost no pressure drop, resulting in good energy efficiency.

4. Wide Range of Applications: Suitable for various fluids including water, steam, oil, nitric acid, acetic acid,  strongly oxidizing media. Different materials (such as WCB, WC6, WC9, 304, 316, Monel, etc.) can be selected based on the medium characteristics.

5. Multiple Actuation Methods: Can be equipped with handwheels, gear operators, electric, pneumatic,  hydraulic actuators as needed to enable remote control  automated operation.

Structural Types

· Gate Types: Solid Wedge, Flexible Wedge, Parallel Double Disc.

· Stem Types: Rising Stem (the stem rises  lowers with the gate, allowing easy visual indication of valve position)  Non-Rising Stem (the stem only rotates, keeping the height constant during operation).

· Connection Standards: Flange connection standards can be supplied according to user requirements, including GB (Chinese Standard), ANSI (American Standard), DIN (German Standard), JIS (Japanese Standard), etc.

Typical Applications

· Long-distance pipelines for petroleum  natural gas.

· High-pressure feedwater systems  steam systems in power plants.

· Corrosive media pipelines in chemical plants.

· Main supply lines for urban water supply  heating systems.

核心术语中英对照：

· 锻造法兰闸阀：Forged Steel Flange Gate Valve

· 阀体：Valve Body

· 闸板：Gate / Disc

· 阀杆：Stem

· 密封面：Sealing Surface / Seat

· 法兰：Flange

· 明杆：Rising Stem (OS & Y - Outside Stem  Yoke)

· 暗杆：Non-Rising Stem (NRS)

· 楔式闸板：Wedge Gate

· 平行式闸板：Parallel Gate

· 双向密封：Bidirectional Sealing

· 流阻系数：Flow Resistance Coefficient