行业组件数据 · 2026

阀盖连接件

A bonnet connection is a critical sealing interface between the valve bonnet and body in regulating valves, ensuring pressure containment and operational integrity.

技术定义与适配语境
典型 阀盖连接件 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 connection is a precision-engineered mechanical interface that joins the valve bonnet to the valve body in regulating valves. It serves as the primary pressure boundary, preventing fluid leakage while allowing access for maintenance and internal component replacement. This connection typically incorporates gaskets, bolts, and sealing surfaces designed to withstand operational pressures, temperatures, and mechanical stresses. In regulating valve bodies, it ensures the actuator assembly remains securely attached while maintaining alignment with the valve trim for precise flow control.

组件规格

定义
The bonnet connection is a precision-engineered mechanical interface that joins the valve bonnet to the valve body in regulating valves. It serves as the primary pressure boundary, preventing fluid leakage while allowing access for maintenance and internal component replacement. This connection typically incorporates gaskets, bolts, and sealing surfaces designed to withstand operational pressures, temperatures, and mechanical stresses. In regulating valve bodies, it ensures the actuator assembly remains securely attached while maintaining alignment with the valve trim for precise flow control.
工作原理
The bonnet connection operates on the principle of creating a reliable pressure seal through mechanical compression. When bolts are torqued to specification, they compress a gasket between the bonnet and body flanges, forming a leak-tight barrier. The connection must maintain this seal under varying pressures, temperatures, and vibration while allowing controlled disassembly for maintenance. In regulating valves, it also provides structural support for the actuator stem and ensures proper alignment with the valve seat for accurate regulation.
材料
Common materials include ASTM A216 WCB (carbon steel)ASTM A351 CF8M (stainless steel 316)ASTM A494 CW-6MC (nickel alloy)or duplex stainless steels like UNS S31803. Gaskets are typically spiral-wound (stainless steel with graphite/filler)ring-type joints (RTJ)or elastomeric seals (EPDMViton) depending on service conditions. Bolts are ASTM A193 B7 or B8M with corresponding nuts.
Seal Type
Gasketed, metal-to-metal, or O-ring
Bolt Torque
As per ASME PCC-1 guidelines
Surface Finish
Ra 3.2 μm or better for sealing surfaces
Connection Type
Bolted flange, threaded, or pressure seal
Pressure Rating
ANSI Class 150 to 2500
Temperature Range
-50°C to 600°C
标准
ISO 5208API 598ASME B16.34DIN EN 12516

行业分类与别名

阀盖连接件 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

Incorrect bolt torque during assembly->Uneven gasket compression leading to leakage->Use calibrated torque wrenches and follow cross-tightening patterns per manufacturer specifications
Thermal cycling causing differential expansion->Loss of bolt preload and seal integrity->Select materials with compatible thermal expansion coefficients and consider spring washers for critical applications

工业生态与工程逻辑

0
Gasket failure leading to leakage
1
Bolt fatigue or corrosion
2
Improper torque causing seal failure
3
Thermal expansion mismatch
4
Cyclic pressure causing joint fatigue

合规与检测

tolerance
Flange flatness within 0.05 mm, bolt hole alignment within 0.5 mm, surface finish Ra ≤ 3.2 μm
test method
Hydrostatic testing per API 598/ISO 5208, helium leak testing for critical services, bolt torque verification using ultrasonic methods

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 connection in regulating valves?

The bonnet connection creates a pressure-tight seal between the valve bonnet and body, preventing fluid leakage while providing access to internal components for maintenance and ensuring proper actuator alignment for flow regulation.

How often should bonnet connections be inspected?

Inspect during routine maintenance cycles (typically 6-12 months) or when leakage is detected. Check for bolt torque, gasket condition, and surface integrity, especially after thermal cycling or pressure changes.

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初步技术归类
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URN:CNFX:ME:UNIT:BONNET_CONNECTION