最火截止阀标准一览母婴护理多级泵软水设备切馅机卧式镗床x

截止阀标准一览

截止阀的启闭件是塞形的阀瓣，密封面呈平面或锥面，阀瓣沿流体的中心线作直线运动。阀杆的运动形式，有升降杆式（阀杆升降，手轮不升降），也有升降旋转杆式（手轮与阀杆一起旋转升降，螺母设在阀体上）。截止阀只适用于全开和全关，不允许作调节和节流。

截止阀属于强制密封式阀门，所以在阀门关闭时，必须向阀瓣施加压力，以强制密封面不泄漏。当介质由阀瓣下方进入阀六时，操作力所需要克服的阻力，是阀杆和填料的磨擦力与由介质的压力所产生的推力，关阀门的力比开阀门的力大，所以阀杆的直径要大，否则会发生阀杆顶弯的故障。近年来，从自密封的阀门出现后，截止阀的介质流向就改由阀瓣上方进入阀腔，这时在介质压力作用下，关阀门的力小，而开阀门的力大，阀杆的直径可以相应地减少。同时，在介质作用下，这种形式的阀门也较严密。我国阀门“三化给”曾规定，截止阀的流向，一律采用自上而下。

截止阀开启时，阀瓣的开启高度，为公称直径的25%～30%时，流量已达到最大，表示阀门已达全开位置。所以截止阀的全开位置，应由阀瓣的行程来决定。

标准编号标准中文名称标准英文名称DL/T(2005复审) 电站高温高压截止阀、闸阀技术条件GB/T 船用法兰铸钢截止阀(四进位)Marine cast steel flanged stop valvesGB/T 通用阀门法兰连接钢制截止阀和升降式止回阀General purpose industrial valves—Flanged steel globe valves and lift check valvesGB/T 通用阀门铁制截止阀与升降式止回阀General purpose industrial valves—Casting iron globe valves and lift check valvesGB/T 船用低压外螺纹青铜截止阀Marine low pressure bronze male threaded stop valvesGB/T 船用法兰铸铁双排截止阀箱Marine cast iron flange dual-row stop valves-caseGB/T 船用法兰铸铁截止阀Marine cast iron flanged stop valvesGB/T 船用外螺纹锻钢截止阀Marine forged steel male thread stop valvesGB/T 船用法兰铸钢截止阀Marine cast steel flanged stop valvesGB/T 船用外螺纹青铜截止阀Marine bronze male thread stop valvesGB/T 船用法兰青铜截止阀Marine bronze flanged stop valvesJB/T 制冷装置用截止阀JB/T 针形截止阀JB/T 空气分离设备用低温截止阀和节流阀技术条件JB/T 高压平衡截止阀 产品质量分等JB/T 截止阀产品质量分等JB/T 空气分离设备用低温截止阀和节流阀 产品质量分等JB/T 截止阀静压寿命试验规程HG/T 聚三氟氯乙烯塑料衬里截止阀NF E 工业用阀.钢制球阀、球状截止阀和止回阀(Industrial valves - Steel globe and globe stop and check valves.)NF P 建筑物用阀门.建筑物中供应引用水用铜合金截止阀.试验和要求(Building valves - Copper alloy stopvalves for potable water supply in buildings - Tests and requirements.)NF D 燃气燃烧器和燃气用具用自动截止阀的阀门检验系统(Valve proving systems for automatic shut-off valves for gas burners and gas appliances.)NF A 气焊设备.焊接、切割和相关工艺用带截止阀的速动连接(Gas welding equipment - Quick-action coupling with shut-off valves for welding, cutting and allied processes.)NF M 液化烃容器装置.手动截止阀.制造.功能.试验(LIQUEFIED HYDROCARBON INSTALLATIONS IN CONTAINERS. MANUALLY CONTROLLED STOP VALVE. CONSTRUCTION. OPERATION. TESTS.)NF P 建筑物水管阀门.水表截止阀.一般技术规范(VALVES AND TAPS FOR WATER SUPPLY IN BUILDINGS. STOP VALVES FOR METER. GENERAL TECHNICAL SPECIFICATIONS.)

BS EN 工业用阀.钢制球阀、球状截止阀和止回阀(Industrial valves - Steel globe and globe stop and check valves)BS 一类、二类和三类燃气用手动截止阀规范(Specification for open bottomed taper plug valves for 1st, 2nd and 3rd family gases up to 200 mbar)BS 带有流量调节器、闭路开关指示、闭合位置指示器开关或气流量控制的电动自动气体截止阀规范(Specification for electrically operated automatic gas shut-off 煮制锅valves fitted with throughput adjusters, proof of closure switches, closed position indicator switches or gas flow control)BS 给排水设施用排放旋塞和截止(旋压式)阀规范.第2部分:排放旋塞和地面上用截止阀(Specification for draw-off taps and stopvalves for water services (screw-down pattern) - Dr8 删除测试aw-off taps and above-ground stopvalves)BS 石油、石油化学及有关工业用钢球形阀、球形截止阀吊车与单向阀(有法兰及对接焊端)规范(Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries体现了我们两国关系密切友好)BS 水龙头与截止阀座垫圈材料规范(Specification for materials for water tap and stopvalve seat washers)DIN 液态气的截止阀.概念.安全技术要无需人工参与求.检验.标志(Shut off valves for liquefied gases; definitions, requirement, testing, marking)DIN 造船用铸铁制带法兰的DN15至500的截止阀(Shutt off valves for shipboard use, of cast iron, with flanges, DN 15 to 500)DIN 造船用炮铜制带法兰DN15至500的截止阀(Shutt off valves for shipboard use, of gun metall, with flanges, DN 15 to 500)DIN 造船用管件的交货技术条件.第4部分:截止阀(Technical specifications for valves for shipboard use - Part 4: Stop valves)DIN 造船用管件的交货技术条件.第6部分:手动截止阀(Technical specifications for valves for shipboard use -Part 6: Hand operated gate valves)DIN 低压截止阀.安全技术要求和检验(Gas low-pressure cut-off valves; safety requirements, testing)DIN 公称压力25的冷却剂循环直通截止阀(Through-valves for refrigerant circuits, nominal pressure 25 bar)DIN 公称压力25的冷却剂循环角形截止阀(Elbow valves for refrigerant circuits; nominal pressure 25 bar)DIN 水管.街道地下截止阀门的路盖.DVGW技术规范(Water pipelines; valve boxes for stop valves; DVGW code of practice)DIN EN 燃气燃烧器和燃气用具用自动截止阀的阀门检验系统(Valve proving systems for automatic shut-off valves for gas burners and gas appliances; German version EN 1643:2000)DIN 船用螺纹连接的截止阀和闸阀等概述(Valves and Gate Valves with Screwed Connections; Survey of Types for Shipbuilding)生产的ABS已过汽车制造厂的试用与认证DIN 船只及造船技术.超轻型截止阀DN32-DN125(PN10)(Ships and marine technology - Shut off valves extra light duty DN 32 to DN 125, PN 10)DIN EN 工业用阀.钢制球阀、球状截止阀和止回阀(Industrial valves - Steel globe and globe stop and check valves; German version EN 13709:2002)DIN EN 建筑阀门.建筑物中饮用水供应用铜合金截止阀试验和要求(Building valves - Copper alloy stopvalves for potable water supply in buildings - Tests and requirements; German version EN 1213:1999)DIN 船舶和航海技术.用手夹紧和法兰连接的超轻型法兰的截止阀(Ships and marine technology - Butterfly valves for flanges extra light duty wafer type and flanged type - DN 50 to DN 125, PN 10)GB/T 船用法兰铸铁单排排出截止阀箱Marine flanged cast iron single arrangement exhaust stop box valveGB/T 船用法兰铸铁单排吸入截止阀箱Marine flanged cast iron single arrangement suction stop box valveJIS B 致冷装置的截止阀(Stop valves for refrigerants)JIS F 造船.卡套式30K黄铜截止阀(Shipbuilding -- Brass 30K stop valves with bite joint(s))JIS E 铁路车辆用截止阀(Cut-out cocks for railway rolling stock)JIS E 铁路车辆用青铜截止阀(Bronze stop valves for railway rolling stock)QB/T 卫生洁具、暖气直角式截止阀技术条件Technical requirements for sanitariness ware and heating angle valveQB/T 卫生洁具、暖气直角式截止阀型式和尺寸Shapes and dimensions of sanitariness ware and heating angle valveJB/T 氧气用截止阀

截止阀具有以下优点：

结构简单，制造和维修比较方便。

工作行程小，启闭时间短。

密封性好，密封面间磨擦力小，寿命较长。

截止阀的缺点如下：

流体阻力大，开启和关闭时所需力较大。

不适用于带颗粒、粘度较大、易结焦的介质。

调节性能较差。

中性笔

截止阀的种类按阀杆螺纹的位置分有外螺纹专业音响式、内螺纹式。按介质的流向分，有直通式、直流式和角式。截止阀按密封形式分，有填料密封截止阀和波纹管密封截止阀。

截止阀的安装与维护应注意以下事项：

手轮、手柄操作的截止阀可安装在管道的任何位置上。

手轮、手柄及伟动机构，不允许作起吊用。

介质的流向应与阀体所示箭头方向一致。 (end)

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