行业组件数据 · 2026

阀瓣/阀瓣座

Disc/Clapper is the sealing element in check valves that prevents backflow by closing against the seat when flow reverses.

技术定义与适配语境
典型 阀瓣/阀瓣座 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

The Disc/Clapper is a critical component in check valve assemblies, typically a hinged or guided plate that moves in response to fluid pressure differentials. It opens when forward flow pressure exceeds the cracking pressure and closes automatically when flow stops or reverses, creating a tight seal against the valve seat to prevent backflow. This component ensures unidirectional flow control in piping systems.

组件规格

定义
The Disc/Clapper is a critical component in check valve assemblies, typically a hinged or guided plate that moves in response to fluid pressure differentials. It opens when forward flow pressure exceeds the cracking pressure and closes automatically when flow stops or reverses, creating a tight seal against the valve seat to prevent backflow. This component ensures unidirectional flow control in piping systems.
工作原理
Operates on differential pressure: forward flow lifts the disc away from the seat, allowing fluid passage; cessation or reversal of flow causes the disc to return to the seat via gravity, spring force, or backpressure, creating a seal.
材料
Stainless steel (304316)carbon steelbrassbronzeduplex steelor engineered polymers (PTFENylon) depending on application requirements.
Diameter
10-600 mm
Pressure Rating
PN10-PN100
Cracking Pressure
0.1-1.0 bar
Temperature Range
-20°C to 200°C
标准
ISO 5208DIN EN 12266API 598

行业分类与别名

阀瓣/阀瓣座 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Material degradation from chemical attack->Leakage due to compromised sealing surface->Select corrosion-resistant materials and implement regular inspection
Particulate accumulation on seating surface->Incomplete closure and backflow->Install upstream filtration and schedule maintenance cleaning

工业生态与工程逻辑

0
Seal failure leading to backflow
1
Wear from particulate matter
2
Corrosion in aggressive environments
3
Water hammer from rapid closure

合规与检测

tolerance
Seating surface flatness within 0.05 mm, dimensional tolerances per ISO 2768-m
test method
Hydrostatic seat leakage test per ISO 5208, shell test per API 598

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between a disc and a clapper in check valves?

Disc typically refers to a flat sealing element, while clapper often describes a hinged disc that swings open/closed. In practice, the terms are frequently used interchangeably for the moving sealing component.

How do I select the right Disc/Clapper material?

Consider fluid compatibility, temperature, pressure, corrosion resistance, and wear characteristics. Common choices include stainless steel for general use, brass for water applications, and polymers for chemical resistance.

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CNFX Industrial Component Index · 机械和设备制造

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URN:CNFX:ME:UNIT:DISC_CLAPPER