行业组件数据 · 2026

阀盖

A bonnet is a protective cover component in steam generator pressure relief valves that houses internal mechanisms and provides structural integrity.

技术定义与适配语境
典型 阀盖 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 bonnet is a critical housing component in steam generator pressure relief valve assemblies, designed to enclose and protect the valve's internal working parts such as the stem, spring, and disc. It provides structural support, maintains pressure integrity, and often serves as an attachment point for adjustment mechanisms. In industrial applications, bonnets are engineered to withstand high temperatures and pressures while preventing leakage and ensuring reliable valve operation.

组件规格

定义
The bonnet is a critical housing component in steam generator pressure relief valve assemblies, designed to enclose and protect the valve's internal working parts such as the stem, spring, and disc. It provides structural support, maintains pressure integrity, and often serves as an attachment point for adjustment mechanisms. In industrial applications, bonnets are engineered to withstand high temperatures and pressures while preventing leakage and ensuring reliable valve operation.
工作原理
The bonnet functions as a sealed housing that contains the pressure relief valve's internal components. It maintains a pressure-tight environment while allowing for the transmission of force from the adjustment mechanism to the valve disc. During operation, the bonnet withstands system pressure and provides a mounting surface for the valve spring and stem assembly, ensuring proper alignment and function of the pressure relief mechanism.
材料
Typically manufactured from forged or cast carbon steel (ASTM A105A216 WCB)stainless steel (ASTM A351 CF8/CF8M)or alloy steels. High-temperature applications may use chrome-molybdenum alloys. Materials must meet pressure vessel codes and corrosion resistance requirements.
Leakage Class
ANSI/FCI 70-2 Class IV or better
Surface Finish
Ra 3.2 μm or better
Connection Type
Flanged, threaded, or welded
Pressure Rating
ASME Class 150-2500
Design Standards
ASME B16.34
Temperature Range
-20°C to 425°C
标准
ISO 4126-1ASME B16.34API 526DIN 3320

行业分类与别名

阀盖 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

Improper material selection for operating conditions->Cracking or deformation under pressure->Use materials certified for specific temperature/pressure ranges and conduct regular NDT inspections
Incorrect assembly torque->Thread damage or leakage->Follow manufacturer torque specifications and use calibrated torque wrenches

工业生态与工程逻辑

0
Stress corrosion cracking
1
Thread galling during assembly
2
Seal failure under thermal cycling
3
Material degradation at high temperatures

合规与检测

tolerance
Dimensional tolerances per ASME B16.34, pressure testing to 1.5x design pressure
test method
Hydrostatic pressure test, helium leak test, dimensional verification, material certification

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 primary function of a bonnet in pressure relief valves?

The bonnet serves as a protective housing that contains internal valve components, maintains pressure integrity, and provides structural support while allowing for adjustment of the relief pressure setting.

Can bonnets be interchanged between different valve manufacturers?

Generally not recommended due to differences in design, dimensions, and pressure ratings. Bonnets are typically designed as integral components of specific valve models and should only be replaced with OEM-approved parts.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

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初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

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URN:CNFX:ME:UNIT:BONNET