行业组件数据 · 2026

密封盘/闸板

A sealing disc or gate is a critical component in sealing valves that creates a leak-proof barrier between fluid passages.

技术定义与适配语境
典型 密封盘/闸板 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 sealing disc or gate is a precision-engineered component used in sealing valves (such as upper and lower seal valves) to isolate fluid flow paths. It functions as a movable barrier that mates with a valve seat to prevent leakage when in the closed position. This component is essential for maintaining system pressure, preventing contamination, and ensuring operational safety in industrial fluid handling systems.

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组件规格

定义
The sealing disc or gate is a precision-engineered component used in sealing valves (such as upper and lower seal valves) to isolate fluid flow paths. It functions as a movable barrier that mates with a valve seat to prevent leakage when in the closed position. This component is essential for maintaining system pressure, preventing contamination, and ensuring operational safety in industrial fluid handling systems.
工作原理
The sealing disc/gate operates by moving perpendicular to the fluid flow direction. When actuated, it slides or rotates into position against a precisely machined valve seat, creating a metal-to-metal or elastomer-enhanced seal. The sealing action relies on applied force (from manual, pneumatic, hydraulic, or electric actuators) to compress the disc against the seat, eliminating gaps that could allow fluid passage. In automated systems, position sensors often verify complete closure.
材料
Common materials include stainless steel (304316)carbon steelbrassor specialized alloys for corrosion resistance. Sealing surfaces may incorporate elastomers (VitonEPDMsilicone) or PTFE coatings for enhanced sealing. Hard-facing materials like Stellite are used for abrasive service.
Diameter
25-300 mm
Thickness
5-40 mm
Surface Finish
Ra 0.8 μm or better on sealing faces
Pressure Rating
Up to 6000 psi
Temperature Range
-50°C to 400°C
Flatness Tolerance
0.05 mm maximum deviation
标准
ISO 5208ISO 17292DIN 3356API 598

行业分类与别名

密封盘/闸板 的常用贸易名称、技术标识和检索关键词。

sealing discvalve gatesealing componentindustrial valvesleak preventionvalve partsfluid control密封盘/闸板Sealing Disc/Gate机械和设备制造 密封盘/闸板

上级产品

该组件会出现在以下整机或工业产品中。

密封阀门（如上、下密封阀）
专为工业设备顶部加料系统设计，用于建立并维持密封的阀门，通常控制上、下腔室的隔离。
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FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Abrasive particles in fluid->Surface scoring and increased leakage->Install upstream filtration, use hardened materials, implement regular maintenance
Excessive actuation force->Disc deformation or seat damage->Calibrate actuators to specified torque/force limits, install pressure relief
Thermal cycling->Material fatigue and crack formation->Select materials with matching thermal expansion coefficients, design for thermal stress relief

工业生态与工程逻辑

兼容对象
Gate valvesGlobe valvesIsolation valvesControl valvesPressure seal valves
可替换件
EmersonFlowserveCameronKSBVelan
0
Seal failure leading to leaks
1
Corrosion damage
2
Mechanical wear from particulate matter
3
Thermal expansion mismatch
4
Improper installation causing misalignment

合规与检测

tolerance
Dimensional tolerances per ISO 2768-m, sealing surface flatness within 0.1% of diameter
test method
Hydrostatic/pneumatic testing per ISO 5208, helium leak testing for critical applications, surface inspection per ASME B46.1

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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。

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磨料介质/工作面
Abrasive media for surface finishing, polishing, and material removal in industrial applications.

常见问题

What is the difference between a sealing disc and a gate in valve terminology?

A sealing disc typically refers to a circular component that rotates or lifts to seal, while a gate usually describes a rectangular or wedge-shaped component that slides perpendicular to flow. Both serve similar sealing functions but differ in geometry and movement patterns.

How often should sealing discs be inspected in continuous operation?

Inspect every 6-12 months depending on service conditions. High-cycle or abrasive applications may require quarterly inspections. Monitor for wear, scoring, or deformation that could compromise sealing integrity.

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CNFX Industrial Component Index · 机械和设备制造

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