行业组件数据 · 2026

阀芯（阀塞/阀座）

Trim (Plug/Seat) is the critical flow-regulating component in control valves that directly contacts the process fluid to modulate flow rates.

技术定义与适配语境
典型 阀芯（阀塞/阀座） 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 Trim (Plug/Seat) assembly in a control valve consists of the plug (or disc) and seat, which form the variable orifice through which fluid passes. The plug moves relative to the stationary seat to change the flow area, enabling precise control of flow rate, pressure, or temperature in industrial processes. This component is engineered for specific flow characteristics (linear, equal percentage, quick opening) and must withstand erosion, corrosion, and cavitation.

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组件规格

定义
The Trim (Plug/Seat) assembly in a control valve consists of the plug (or disc) and seat, which form the variable orifice through which fluid passes. The plug moves relative to the stationary seat to change the flow area, enabling precise control of flow rate, pressure, or temperature in industrial processes. This component is engineered for specific flow characteristics (linear, equal percentage, quick opening) and must withstand erosion, corrosion, and cavitation.
工作原理
The plug moves axially or rotationally against the seat to create a variable annular gap. As the valve stem positions the plug closer to or farther from the seat, the flow area changes proportionally, regulating fluid flow according to control signals from a process controller. The geometry of the plug and seat determines the flow characteristic curve.
材料
Stainless steel (316SS17-4PH)Hastelloy C-276Moneltitaniumceramic (aluminasilicon carbide)or hardened alloys with surface treatments like stellite hard-facingchrome platingor tungsten carbide coating for wear resistance.
Cv Range
0.01 to 2000
Size Range
DN15 to DN600 (1/2" to 24")
Leakage Class
ANSI/FCI 70-2 Class II to VI
Pressure Rating
ANSI Class 150 to 2500
Temperature Range
-200°C to 600°C
Flow Characteristic
Linear, Equal Percentage, Quick Opening
标准
ISO 5208IEC 60534ANSI/FCI 70-2API 598

行业分类与别名

阀芯（阀塞/阀座） 的常用贸易名称、技术标识和检索关键词。

control valve trimplug and seatflow control componentvalve trim assemblyindustrial valve partsprocess control equipment阀芯（阀塞/阀座）Trim (Plug/Seat)机械和设备制造 阀芯（阀塞/阀座）

上级产品

该组件会出现在以下整机或工业产品中。

控制阀
一种用于调节系统内流体流量、压力或方向的阀门。
查看产品详情 ->

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

High fluid velocity with abrasive particles->Erosion of plug and seat surfaces leading to increased leakage and loss of control accuracy->Use hardened materials (stellite, ceramics), reduce flow velocity through proper sizing, implement regular inspection schedules
Cavitation in liquid service->Pitting and material removal from imploding vapor bubbles, causing rapid degradation of sealing surfaces->Design with anti-cavitation trim, maintain proper pressure differentials, use multi-stage pressure reduction

工业生态与工程逻辑

兼容对象
Globe Control ValvesAngle Control ValvesCage-Guided Control ValvesRotary Control Valves
可替换件
FisherEmersonSiemensSamsonMetsoSpirax Sarco
0
Erosion from high-velocity fluids
1
Cavitation damage
2
Corrosion from aggressive media
3
Thermal cycling fatigue
4
Improper installation causing leakage

合规与检测

tolerance
Dimensional tolerances per ISO 2768-m, surface finish Ra ≤ 0.8 μm for sealing surfaces, concentricity within 0.05 mm
test method
Hydrostatic shell test per ISO 5208, seat leakage test per ANSI/FCI 70-2, material certification per EN 10204 3.1

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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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常见问题

What is the difference between a plug and seat in valve trim?

The plug is the moving element attached to the valve stem that positions against the stationary seat to create the flow orifice. Together, they form the trim assembly that regulates flow.

How do I select the right trim material for my application?

Consider fluid compatibility (corrosion/erosion), temperature, pressure, and required leakage class. Consult manufacturer charts and industry standards like NACE MR0175 for sour service.

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CNFX Industrial Component Index · 机械和设备制造

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