阀门是用来开闭管路、控制流向、调节和控制输送介质的参数（温度、压力和流量）的管路附件。阀门行业专业术语，你全知道吗？基本专业术语

　　Valves are pipeline accessories used to open and close pipelines, control flow direction, regulate and control the parameters of the conveying medium (temperature, pressure, and flow). Do you know all the professional terms in the valve industry? Basic professional terminology

　　1、强度性能

　　1. Strength performance

　　阀门的强度性能是指阀门承受介质压力的能力。阀门是承受内压的机械产品，因而必须具有足够的强度和刚度，以保证长期使用而不发生破裂或产生变形。

　　The strength performance of a valve refers to its ability to withstand medium pressure. Valves are mechanical products that withstand internal pressure, and therefore must have sufficient strength and stiffness to ensure long-term use without rupture or deformation.

　　2、密封性能

　　2. Sealing performance

　　阀门的密封性能是指阀门各密封部位阻止介质泄漏的能力，它是阀门最重要的技术性能指标。

　　The sealing performance of a valve refers to the ability of each sealing part of the valve to prevent medium leakage, and it is the most important technical performance indicator of the valve.

　　阀门的密封部位有三处：启闭件与阀座两密封面间的接触处；填料与阀杆和填料函的配和处；阀体与阀盖的连接处。其中前一处的泄漏叫做内漏，也就是通常所说的关不严，它将影响阀门截断介质的能力。

　　There are three sealing parts of the valve: the contact between the opening and closing parts and the sealing surface of the valve seat; The matching of packing with valve stem and packing box; The connection between the valve body and the valve cover. The leakage in the first part is called internal leakage, which is commonly referred to as not being tightly closed, and it will affect the valve's ability to cut off the medium.

　　对于截断阀类来说，内漏是不允许的。后两处的泄漏叫做外漏，即介质从阀内泄漏到阀外。外漏会造成物料损失，污染环境，严重时还会造成事故。

　　For block valves, internal leakage is not allowed. The leakage in the last two places is called external leakage, which means that the medium leaks from inside the valve to outside. External leakage can cause material loss, environmental pollution, and in severe cases, accidents.

　　对于易燃易爆、有毒或有放射的介质，外漏更是不能允许的，因而阀门必须具有可靠的密封性能。

　　For flammable, explosive, toxic or radioactive media, leakage is not allowed, so valves must have reliable sealing performance.

　　3、流动介质

　　3. Flowing medium

　　介质流过阀门后会产生压力损失（既阀门前后的压力差），也就是阀门对介质的流动有一定的阻力，介质为克服阀门的阻力就要消耗一定的能量。

　　After the medium flows through the valve, there will be pressure loss (i.e. the pressure difference before and after the valve), which means that the valve has a certain resistance to the flow of the medium. To overcome the resistance of the valve, the medium needs to consume a certain amount of energy.

　　从节约能源上考虑，设计和制造阀门时，要尽可能降低阀门对流动介质的阻力。

　　From the perspective of energy conservation, when designing and manufacturing valves, the resistance of the valve to the flowing medium should be minimized as much as possible.

　　4、启闭力和启闭力矩

　　4. Opening and closing force and torque

　　启闭力和启闭力矩是指阀门开启或关闭所必须施加的作用力或力矩。

　　The opening and closing force and torque refer to the force or torque that must be applied to open or close a valve.

　　关闭阀门时，需要使启闭件与发座两密封面间形成一定的密封比压，同时还要克服阀杆与填料之间、阀杆与螺母的螺纹之间、阀杆端部支承处及其他磨擦部位的摩擦力，因而必须施加一定的关闭力和关闭力矩，阀门在启闭过程中，所需要的启闭力和启闭力矩是变化的，其最大值是在关闭的最终瞬时或开启的最初瞬时。设计和制造阀门时应力求降低其关闭力和关闭力矩。

　　When closing the valve, it is necessary to establish a certain sealing pressure between the opening and closing parts and the sealing surface of the seat. At the same time, it is necessary to overcome the frictional forces between the valve stem and the packing, the threads between the valve stem and the nut, the end support of the valve stem, and other friction parts. Therefore, a certain closing force and closing torque must be applied. During the opening and closing process of the valve, the required opening and closing force and torque vary, and the maximum value is at the final moment of closing or the initial moment of opening. When designing and manufacturing valves, efforts should be made to reduce their closing force and closing torque.

　　5、启闭速度

　　5. Opening and closing speed

　　启闭速度是用阀门完成一次开启或关闭动作所需的时间来表示。一般对阀门的启闭速度无严格要求，但有些工况对启闭速度有特殊要求，如有的要求迅速开启或关闭，以防发生事故，有的要求缓慢关闭，以防产生水击等，这在选用阀门类型时应加以考虑。

　　The opening and closing speed is expressed as the time required for a valve to complete one opening or closing action. There are generally no strict requirements for the opening and closing speed of valves, but some operating conditions have special requirements for the opening and closing speed. Some require quick opening or closing to prevent accidents, while others require slow closing to prevent water hammer. This should be considered when selecting valve types.

　　6、动作灵敏度和可靠性

　　6. Action sensitivity and reliability

　　这是指阀门对于介质参数变化，做出相应反应的敏感程度。对于节流阀、减压阀、调节阀等用来调节介质参数的阀门以及安全阀、疏水阀等具有特定功能的阀门来说，其功能灵敏度与可靠性是十分重要的技术性能指标。

　　This refers to the sensitivity of valves to changes in medium parameters and their corresponding responses. For valves such as throttle valves, pressure reducing valves, and regulating valves used to adjust medium parameters, as well as valves with specific functions such as safety valves and drain valves, their functional sensitivity and reliability are very important technical performance indicators.

　　7、使用寿命

　　7. Service life

　　它表示阀门的耐用程度，是阀门的重要性能指标，并具有很大的经济意义。通常以能保证密封要求的启闭次数来表示，也可以用使用时间来表示。

　　It represents the durability of the valve, is an important performance indicator of the valve, and has great economic significance. It is usually expressed in terms of the number of opening and closing times that can ensure the sealing requirements, or it can be expressed in terms of usage time.

　　8、类型（type）

　　8. Type (type)

　　按用途或主要结构特点对阀门的分类

　　Classification of valves by purpose or main structural characteristics

　　9、型号（model）

　　9. Model (model)

　　按类型、传动方式、连接形式、结构特点、阀座密封面材料和公称压力等对阀门的编号。

　　Number valves according to type, transmission method, connection form, structural characteristics, valve seat sealing surface material, and nominal pressure.

　　10、连接尺寸（connection dimensions）

　　10. Connection dimensions

　　阀门和管道连接部位的尺寸

　　Dimensions of valve and pipeline connection parts

　　11、主要外形尺寸（general dimensions）

　　11. Main external dimensions

　　阀门的开启和关闭高度、手轮直径以及连接尺寸等。

　　The opening and closing height, handwheel diameter, and connection size of the valve.

　　12、连接形式（type of connection）

　　12. Type of connection

　　阀门与管道或机器设备的连接所采用的各种方式(如法兰连接\螺纹连接\焊接连接等）。

　　The various methods used to connect valves to pipelines or machinery equipment, such as flange connections, threaded connections, welded connections, etc.

　　13、密封试验（seal test）

　　13. Seal test

　　检验启闭件和阀体密封副性能的试验。

　　Test to verify the sealing performance of the opening and closing components and valve body.

　　14、上密封试验（back seal test）

　　14. Back seal test

　　检验阀杆与阀盖密封副密封性能的试验。

　　Test to verify the sealing performance of the valve stem and valve cover sealing pair.

　　15、密封试验压力（seal test pressure）

　　15. Seal test pressure

　　阀门进行密封试验时规定的压力。

　　The pressure specified during the sealing test of the valve.

　　16、适用介质 （suitable medium）

　　16. Suitable medium

　　阀门能适用的介质。

　　The medium that the valve can be applied to.

　　17、适用温度 （suitable temperature）

　　17. Suitable temperature

　　阀门适用的介质的温度范围。

　　The temperature range of the medium suitable for the valve.

　　18、密封面（sealing face）

　　18. Sealing face

　　启闭件与阀座（阀体）紧密贴合，起密封作用的两个接触面。

　　The two contact surfaces between the opening and closing components and the valve seat (valve body) are tightly adhered, providing a sealing effect.

　　19、启闭件 （disc）

　　19. Opening and closing components (disc)

　　用于截断或调节介质流通的一种零件的统称，如闸阀中的闸板、节流阀中的阀瓣等。

　　A general term for a component used to cut off or regulate the flow of a medium, such as the gate in a gate valve or the valve disc in a throttle valve.

　　20、填料（packing）

　　20. Packing

　　装入填料函（或填料箱）中，阻止介质从阀杆处泄漏的填充物。

　　Fill the stuffing box (or stuffing box) to prevent the medium from leaking from the valve stem.

　　21、填料垫（packing seat）

　　21. Packing seal

　　支承填料，保持填料密封的零件。

　　Components that support packing and maintain packing sealing.

　　22、填料压盖(gland)

　　22. Packing gland

　　用以压紧填料达到密封的零件。

　　A component used to compress packing to achieve sealing.

　　23、支架(yoke)

　　23. Bracket (yoke)

　　在阀盖或阀体上，用于支承阀杆螺母和传动机构的零件。

　　A component used to support the valve stem nut and transmission mechanism on the valve cover or body.

　　24、连接槽尺寸(dimension of connecting channel)

　　24. Dimension of connecting channel

　　启闭件与阀杆装配连接部位的结构尺寸。

　　The structural dimensions of the connection between the opening and closing components and the valve stem assembly.

　　25、流道面积( flow area)

　　25. Flow area

　　指阀门进口端到阀座密封面间的最小截面积（但不是指“帘”面积），用来计算无任何阻力影响时的理论排量。

　　The minimum cross-sectional area between the inlet end of the valve and the sealing surface of the valve seat (but not the "curtain" area) is used to calculate the theoretical displacement without any resistance effect.

　　26、流道直径 (flow diameter)

　　26. Flow diameter

　　对应于流道面积的直径。

　　The diameter corresponding to the flow channel area.

　　27、流量特性 (flow characteristics)

　　27. Flow characteristics

　　稳定流动状态下，当进口压力等参数不变时，减压阀的出口压力与流量的函数关系。

　　The functional relationship between the outlet pressure and flow rate of a pressure reducing valve in a stable flow state when parameters such as inlet pressure remain constant.

　　28、流量特性偏差(flow characteristics derivation)

　　28. Flow characteristics derivation

　　稳定流动状态下，当进口压力等参数不变时，减压阀流量的变化所引起的出口压力变化值。

　　The change in outlet pressure caused by the change in flow rate of the pressure reducing valve under stable flow conditions, when parameters such as inlet pressure remain unchanged.

　　29、通用阀门 (general valve)

　　29. General valve

　　各工业企业中管道上普遍采用的阀门。

　　Valves commonly used on pipelines in various industrial enterprises.

　　30、自动阀门 (Self-acting valve)

　　30. Self active valve

　　依靠介质（液体、空气、蒸汽等）本身的能力而自行动作的阀门。

　　A valve that operates on its own by relying on the ability of the medium (liquid, air, steam, etc.).

　　31、驱动阀门 (Actuated valve)

　　31. Activated valve

　　借助手动、电力、液压或气压来操纵的阀门。

　　Valves operated by manual, electric, hydraulic, or pneumatic means.

　　32、撞击手轮 (hammer blow handwheel)

　　32. Hammer blow handwheel

　　利用撞击作用力以减轻阀门操作力的手轮结构。

　　A handwheel structure that utilizes impact force to reduce valve operating force.

　　33、蜗轮传动装置(wormgear actuator)

　　33. Worm gear actuator

　　用蜗轮机构启闭或调节阀门的装置。

　　A device that uses a worm gear mechanism to open, close, or adjust valves.

　　34、气动装置 (pneumatic actuator)

　　34. Pneumatic actuator

　　用气压力启闭或调节阀门的驱动装置。

　　The driving device for opening, closing or regulating valves with air pressure.

　　35、液动装置 (hydraulic actuator)

　　35. Hydraulic actuator

　　用液压力启闭或调节阀门的驱动装置。

　　The driving device for opening, closing or regulating valves with hydraulic pressure.

　　36、热凝结水排量(Hot condensate capacity)

　　36. Hot condensate capacity

　　在给定压差和温度下疏水阀一内能排出凝结水的最大量

　　The maximum amount of condensate that can be discharged from a drain valve at a given pressure difference and temperature

　　37、漏汽量 (Steam loss)

　　37. Steam loss

　　单位时间内疏水阀漏出新鲜蒸汽的量。

　　The amount of fresh steam leaked from the drain valve per unit time.

　　阀门定义术语

　　Valve definition terminology

　　1.阀门(valve)

　　1. Valve

　　用来控制管道内介质流动的，具有可动机构的机械产品的总体。

　　The overall mechanical product with a movable mechanism used to control the flow of media in pipelines.

　　2.闸阀(gate valve, slide valve)

　　2. Gate valve (slide valve)

　　启闭件(闸板)由阀杆带动,沿阀座(密封面)作升降运动的阀门。

　　The opening and closing element (gate) is a valve driven by the valve stem and moves up and down along the valve seat (sealing surface).

　　3.截止阀(globe valve, stop valve)

　　3. Globe valve (stop valve)

　　启闭式（阀瓣）由阀杆带动，沿阀座（密封面）轴线作升降运动的阀门。

　　Open close type (valve disc) is a valve driven by the valve stem and moves up and down along the axis of the valve seat (sealing surface).

　　4.节流阀 (throttle valve)

　　4. Throttle valve

　　通过启闭件（阀瓣）改变通路截面积，以调节流量、压力的阀门。

　　A valve that adjusts flow and pressure by changing the cross-sectional area of the passage through opening and closing components (valve discs).

　　5.球阀 (ball valve)

　　5. Ball valve

　　启闭式（球体）绕垂直于通路的曲线旋转的阀门。

　　A valve that rotates around a curve perpendicular to the passage in a spherical manner.

　　6.蝶阀 (butterfly valve)

　　6. Butterfly valve

　　启闭式（蝶板）绕固定轴旋转的阀门。

　　A valve with a butterfly plate that rotates around a fixed axis.

　　7.隔膜阀 (diaphragm valve)

　　7. Diaphragm valve

　　启闭式（隔膜）由阀杆带动，沿阀杆轴线作升降运动，并将动作机构与介质隔开的阀门。

　　Open close type (diaphragm) is a valve driven by the valve stem, which moves up and down along the axis of the valve stem and separates the action mechanism from the medium.

　　8.旋塞阀 (cock)

　　8. Cock valve

　　启闭式（塞子）绕其轴线旋转的阀门。

　　A valve with a plug that rotates around its axis.

　　9.止回阀(check valve, non-return valve)

　　9. Check valve (non return valve)

　　启闭式（阀瓣）借介质作用力，自动阻止介质逆流的阀门。

　　Open close type (valve disc) is a valve that automatically prevents the reverse flow of the medium by utilizing the force of the medium.

　　10.安全阀(safety valve, relief valve)

　　10. Safety valve, relief valve

　　启闭式（阀瓣）当管道或机器设备内介质压力超过规定值时自动开启排放；低于规定值时自动关闭，对管道或机器起保护作用的阀门。

　　Open close type (valve disc) automatically opens for discharge when the pressure of the medium in the pipeline or machinery exceeds the specified value; A valve that automatically closes when it falls below the specified value, providing protection for pipelines or machines.

　　11.减压阀(pressure reducing valve)

　　11. Pressure reducing valve

　　通过启闭件（阀瓣）的节流，将介质压力降低，并借阀后压力的直接作用，使阀后压力自动保持在一定范围内的阀门。

　　A valve that reduces the pressure of the medium by throttling the opening and closing components (valve discs), and automatically maintains the pressure within a certain range through the direct action of the pressure behind the valve.

　　12.疏水阀(steam trap)

　　12. Steam trap

　　自动排放凝结水并阻止蒸汽泄漏的阀门。

　　A valve that automatically discharges condensed water and prevents steam leakage.

　　13.排污阀(Draining Valves)

　　13. Drainage Valves

　　用于锅炉、压力容器等设备排污的阀门。

　　Valves used for discharging pollutants from boilers, pressure vessels, and other equipment.

　　14.低压阀门(low pressure valve)

　　14. Low pressure valve

　　公称压力PN≤1.6MPa的各种阀门。

　　Various valves with nominal pressure PN ≤ 1.6MPa.

　　15.中压阀门(middle pressure valve)

　　15. Middle pressure valve

　　公称压力为PN≥2.0～PN＜10.0MPa的各种阀门。

　　Various valves with nominal pressure ranging from PN ≥ 2.0 to PN ＜ 10.0MPa.

　　16.高压阀门(high pressure valve)

　　16. High pressure valve

　　公称压力PN≥10.0MPa的各种阀门。

　　Various valves with nominal pressure PN ≥ 10.0MPa.

　　17.超高压阀门(super high pressure valve)

　　17. Super high pressure valve

　　公称压力PN≥100.0MPa的各种阀门。

　　Various valves with nominal pressure PN ≥ 100.0MPa.

　　18.高温阀门(high temperature valve)

　　18. High temperature valve

　　用于介质温度＞450℃的各种阀门。

　　Used for various valves with medium temperature>450 ℃.

　　19.低温阀门(sub-zero valve)

　　19. Low temperature valve (sub zero valve)

　　用于介质温度为-40℃～-100℃的各种阀门。

　　Used for various valves with medium temperatures ranging from -40 ℃ to -100 ℃.

　　20.超低温阀门(cryogenic valve)

　　20. Cryogenic valve

　　用于介质温度＜-100℃的各种阀门。阀门结构术语

　　Used for various valves with medium temperature<-100 ℃. Valve structure terminology

　　1.结构长度（face-to-face dimension, face-to-centre dimension）

　　1. Structural length (face to face dimension, face to center dimension)

　　阀门进、出口端面之间的距离；或进口端面至出口轴线的距离。

　　The distance between the inlet and outlet end faces of the valve; Or the distance from the inlet end face to the outlet axis.

　　2.直通式阀门结构长度（through way type of valves Face to face dimensions）

　　2. Through way type of valve face to face dimensions

　　在阀体通道终端两个垂直于阀门轴线平面之间的距离。

　　The distance between two planes perpendicular to the valve axis at the end of the valve body channel.

　　3.角式阀门结构长度（angle type of valves Face to face,end to end, center to face and centerto end dimensions）

　　3. Angle type of valve face to face, end to end, center to face and center end dimensions

　　在阀体通道某一终端垂直于轴线的平面与阀体另一终端轴线之间的距离。

　　The distance between the plane perpendicular to the axis at one end of the valve body channel and the axis at the other end of the valve body.

　　4.结构形式（type of construction）

　　4. Type of construction

　　各类阀门在结构和几何形状上的主要特征。

　　The main characteristics of various types of valves in terms of structure and geometric shape.

　　5.直通式（through way type）

　　5. Through way type

　　进、出口轴线重合或相互平行的阀体形式。

　　The valve body form in which the inlet and outlet axes coincide or are parallel to each other.

　　6.角式（angle type）

　　6. Angle type

　　进、出口轴线相互垂直的阀体形式。

　　The valve body form with inlet and outlet axes perpendicular to each other.

　　7.直流式（y-globe type, y-type,diaphragm type）

　　7. DC type (y-globe type, y-type, diaphragm type)

　　通路成一直线，阀杆位置与阀体通路轴线成锐角的阀体形式。

　　A valve body form in which the passage is in a straight line and the position of the valve stem is at an acute angle to the axis of the valve body passage.

　　8.三通式（three way type）

　　8. Three way type

　　具有三个通路方向的阀体形式。

　　A valve body with three directions of passage.

　　9.T形三通式（T-pattern three way）

　　9. T-pattern three way

　　塞子（或球体）的通路呈“T”璩 的三通式。

　　The pathway of a plug (or sphere) follows a three-way formula of "T".

　　10.L形三通式（L-pattern three way）

　　10. L-pattern three way

　　塞子（或球体）的通路呈“L”璩 的三通式。

　　The pathway of a plug (or sphere) follows a three part formula of "L".

　　11.平衡式（balance type）

　　11. Balance type

　　利用介质压力平衡其对阀杆的轴向力的结构形式。

　　The structural form of using medium pressure to balance its axial force on the valve stem.

　　12.杠杆式（lever type）

　　12. Lever type

　　采用杠杆带动启闭件的结构形式。

　　The structure adopts a lever driven opening and closing element.

　　13.常开式（normally open type）

　　13. Normally open type

　　无外力作用时，启闭件自动处于开启位置的结构形式。

　　The structural form in which the opening and closing components are automatically in the open position when there is no external force acting.

　　14.常闭式（normally closed type）

　　14. Normally closed type

　　无外力作用时，启闭件自动处于关闭位置的结构形式。

　　The structural form in which the opening and closing components are automatically in the closed position when there is no external force acting.

　　15.保温式（steam jacket type）

　　15. Insulated (Steam Jacket Type)

　　带有蒸汽加热夹套结构的各种阀门。

　　Various valves with steam heating jacket structure.

　　16.波纹管式（bellows seal type）

　　16. Bellows seal type

　　带有波纹管结构的各种阀门。

　　Various valves with corrugated pipe structure.

　　17.全径阀门 （full-opening valve）

　　17. Full opening valve

　　阀门内所有部位流道内径尺寸与公称管道内径尺寸相同的阀门。

　　Valves with the same inner diameter as the nominal pipe diameter for all parts of the flow channel inside the valve.

　　18.缩径阀门（reduced-opening valve）

　　18. Reduced opening valve

　　阀门内流道孔通径缩小的阀门。

　　A valve with a reduced diameter of the inner channel hole.

　　19.缩口阀门（reduced-bore valve）

　　19. Reduced body valve

　　阀门内流道孔通径缩小，且阀门关闭件流道口为非圆形的阀门。

　　The diameter of the flow channel hole inside the valve is reduced, and the flow channel port of the valve closure is non-circular.

　　20.单向阀门（un-directional valve）

　　20. Unidirectional valve

　　设计为仅一个介质流动方向密封的阀门。

　　A valve designed to seal in only one direction of medium flow.

　　21.双向阀门（bi-directional valve）

　　21. Bidirectional valve

　　设计为两个介质流动方向均密封的阀门。

　　Designed as a valve that seals in both directions of medium flow.

　　22.双座双向阀门（twin-seat, both seats bi-directional, valve）

　　22. Twin seat, both seats bi directional, valve

　　阀门有两个密封座，每个阀座的两个介质流动方向均可密封的阀门。

　　A valve has two sealing seats, and each seat can seal both directions of medium flow.

　　23.一单向座、一双向座的双座阀（twin-seat, one seat un-directional and one seatsbi-directional, valve）

　　23. Twin seat, one seat un directional and one seat bi directional valves

　　具有两个密封副的阀门，在关闭位置时，两个密封副可同时保持密封状态，中腔内（两个密封副间）的阀体有一个泄放介质压力的接口。表示符号DBB。

　　A valve with two sealing pairs can maintain a sealed state simultaneously when in the closed position. The valve body in the middle chamber (between the two sealing pairs) has an interface for releasing medium pressure. Representing the symbol DBB.

　　24.上密封（back seat, back face）

　　24. Back seal, back face

　　当阀门全开时，阻止介质由填料函处渗漏的一种密封结构。

　　A sealing structure that prevents medium leakage from the packing box when the valve is fully opened.

　　25.压自封（pressure seal）

　　25. Pressure seal

　　利作介质压力使阀体与阀盖连接处实现自动密封的结构。

　　The structure that utilizes medium pressure to achieve automatic sealing at the connection between the valve body and the valve cover.

　　26.阀杆头部尺寸（dimension of valve stem head）

　　26. Dimension of valve stem head

　　阀杆与手轮、手柄或其它操纵机械装配连接部位的结构尺寸。

　　The structural dimensions of the connection between the valve stem and the handwheel, handle, or other mechanical assembly parts.

　　27.阀杆端部尺寸（dimension of valve stem end）

　　27. Dimension of valve stem end

　　阀杆与启闭件连接部位的结构尺寸。

　　The structural dimensions of the connection between the valve stem and the opening and closing components.

　　28.连接槽尺寸（dimension of connecting channel）

　　28. Dimension of connecting channel

　　启闭件与阀杆装配连接部位的结构尺寸。

　　The structural dimensions of the connection between the opening and closing components and the valve stem assembly.

　　29.连接形式（type of connection）

　　29. Type of connection

　　阀门与管道或机器设备的连接所采用的各种方式（如法兰连接、螺纹连接、焊接连接等）。阀门零部件术语

　　The various methods used to connect valves to pipelines or machinery equipment, such as flange connections, threaded connections, welded connections, etc. Terminology of valve components

　　1.阀体（body）

　　1. Valve body

　　与管道（或机器设备）直接连接，构成介质流通流道的零件。

　　A component directly connected to a pipeline (or machinery) to form a medium flow channel.

　　2.阀盖（bonnet, cover, cap, lid）

　　2. Bonnet, cover, cap, lid

　　与阀体相连并与阀体（或通过其它零件，如隔膜等）构成压力腔的主要零件。

　　The main component connected to the valve body and forming a pressure chamber with the valve body (or through other parts such as diaphragms).

　　3.启闭件（disc）

　　3. Opening and closing components (disc)

　　用于截断或调节介质流通的一种零件的统称，如闸阀中的闸板、节流阀中的阀瓣等。

　　A general term for a component used to cut off or regulate the flow of a medium, such as the gate in a gate valve or the valve disc in a throttle valve.

　　4.阀瓣（disc）

　　4. Valve disc (disc)

　　截止阀、节流阀、止回阀等阀门中的启闭件。

　　The opening and closing components in valves such as globe valves, throttle valves, and check valves.

　　5.阀座（bodyseat ring, shoulder seated, bottom seat）

　　5. Body eat ring, should seat, bottom seat

　　安装在阀体上，与启闭件组成密封副的零件。

　　A component installed on the valve body and forming a sealing pair with the opening and closing parts.

　　6.密封面（sealing face）

　　6. Sealing face

　　启闭件与阀座（阀体）紧密贴合，起密封作用的两个接触面。

　　The two contact surfaces between the opening and closing components and the valve seat (valve body) are tightly adhered, providing a sealing effect.

　　7.阀杆（stem, apindle）

　　7. Stem and spine

　　将启闭力传递到启闭件上的主要零件。

　　The main components that transmit the opening and closing force to the opening and closing parts.

　　8.阀杆螺母（yoke bushing, yoke nut）

　　8. Valve stem nut (yoke bushing, yoke nut)

　　与阀杆螺纹构成运动副的零件。

　　A component that forms a motion pair with the valve stem thread.

　　9.填料函

　　9. Packing box

　　在阀盖（或阀体）上， 充填填料，用来阻止介质由阀杆处泄漏的一种结构。

　　A structure that fills the valve cover (or valve body) with packing to prevent medium leakage from the valve stem.

　　10.填料箱（stuffing box）

　　10. Stuffing box

　　充填填料，阻止介质自阀杆处泄漏的零件。

　　Fill the filling material to prevent the leakage of the medium from the valve stem.

　　11.填料压盖（gland, gland flange, pne-piece glang）

　　11. Packing gland (glass, glass flange, pne leather gland)

　　用以压紧填料达到密封的零件。

　　A component used to compress packing to achieve sealing.

　　12.填料（packing,packing rings）

　　12. Packing (packing rings)

　　装入填料函（或填料箱）中，阻止介质双阀杆处泄漏的填充物。

　　Fill the packing box (or stuffing box) with filling material to prevent leakage at the double valve stem of the medium.

　　13.填料垫（packing seat, packing washer）

　　13. Packing seal, packing washer

　　支承填料，保持填料密封的零件。

　　Components that support packing and maintain packing sealing.

　　14.支架（yoke）

　　14. Bracket (yoke)

　　在阀盖或阀体上，用于支承阀杆螺母和传动机构的零件。

　　A component used to support the valve stem nut and transmission mechanism on the valve cover or body.

　　15.撞击手轮（impact handwheel, hammer blow handwheelimpact handwheel, hammer blow handwheel）

　　15. Impact Handwheel, Hammer Blow Handwheel Impact Handwheel, Hammer Blow Handwheel

　　利用撞击作用力以减轻阀门操作力的手轮结构。

　　A handwheel structure that utilizes impact force to reduce valve operating force.

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