美国阀门知识(美标阀门)
美国阀门知识(美标阀门乔布斯 比尔盖茨)
Valve Knowledge
一、阀门结构种类、材质、认证
Valve Design, Materials, and Approvals
阀门结构种类
Valve Design Choices
1. 多回转阀门
1. Multi-Turn
a) 闸阀
a) Gate
b) 截止阀/角-截止阀
b) Globe/Angle-Globe
2. 90o回转阀门
2. Quarter-Turn
a) 球阀
a) Ball
b) 蝶阀-弹性阀座
卡特里娜飓风b) Butterfly-resilient ated
3. 止回阀(阻止倒流)
3. Check (backflow prevention)
a) 旋启式
英语口语8000句 a) Swing
assists b) 升降式
b) Lift
c) 弹簧驱动式
c) Spring-actuated
4. 连接端口
4. End connections
材质
Materials
1. 青铜(压力150 psi下温度可达287oC;温度65oC下压力可达600 psi),通径范围:DN8至DN80桂林雅思培训
1. Bronze (up to 550°F at 150 psi/up to 600 psi at 150°F) 1/4"-3"
2. 铸铁(压力250 psi下温度可达232oC;温度37oC下压力可达500 psi),通径范围:DN50至DN600
2. Cast Iron (up to 450°F at 250 psi/up to 500 psi at 100°F) 2"-24"
3. 球墨铸铁(压力125 psi下温度可达343oC;温度37oC下压力可达600 psi),通径范围:DN50至DN300
3. Ductile Iron (up to 650°F at 125 psi/up to 600 psi at 100°F) 2"-12"
4. 不锈钢(压力125 psi下温度可达343oC;温度37oC下压力可高达2000 psi),通径范围:DN8至DN300
supplies 4. Stainless Steel (up to 650°F at 125 psi/up to 2000 psi at 100°F) 1/4"-12"
认证
Approvals
1. 美国阀门和管件制造商标准化协会(MSS)
1. Manufacturers Standardization Society (MSS)
2. 消防安全认证(UL®和FM)
2. Fire protection (UL® and FM)
3. 州立标准和地方标准
3. State and local codes.
二、阀门选型、功能,及管道系统的主要因素
Function and rvice considerations
usborne选型
Selection
在建筑物管道系统中,阀门起着控制流体的作用。由于结构和材质的不同,因此制造出的阀门也就各不相
同。
Valves rve the purpo of controlling the fluids in building rvices piping. Valves are
produced in a variety of design types and materials.
为了保证管道系统能够实现最高的效率,最低的成本和最长的使用寿命,阀门的正确选型至关重要。
Proper lection is important to ensure the most efficient, cost-effective and long-lasting
systems.
功能
Function
阀门具有四种主要功能:
Valves are designed to perform four principal functions:
1. 启动和阻止介质流动
1. Starting and stopping the flow
2. 调节(节流)介质流量
2. Regulating (throttling) the flow
3. 阻止倒流或回流
宇多田光 first love 3. Preventing reversal of the flow
4. 调节或泄放流体压力
一对一初中英语辅导4. Regulating or relieving the pressure of the flow
管道系统的主要因素
Service Considerations
1. 压力
1. Pressure
2. 温度
2. Temperature
3. 流体介质类型
3. Type of fluid
a) 流体
a) Liquid
b) 气体:例如,蒸汽或空气
b) Gas; i.e., steam or air
c) 杂质或研磨剂(侵蚀性物质)含量
c) Dirty or abrasive (erosive)
d) 腐蚀性
d) Corrosive
4. 介质流动
4. Flow
a) 开启-关闭调节
a) On-off throttling
b) 需要防止倒流或回流
b) Need to prevent flow reversal
c) 关注压降
c) Concern for pressure drop
d) 流速
d) Velocity
5. 工作环境
5. Operating conditions
a) 冷凝
a) Condensation
b) 工作频率
b) Frequency of operation
c) 可接近性
c) Accessibility
d) 外形尺寸/所适用的空间
d) Overall size/space available
e) 手动或自动控制
e) Manual or automated control
f) 需要具有无气泡关闭性能
f) Need for bubble-tight shut-off
三、连接方式
End Connection
a) 螺纹连接的多回转阀门、止回阀和球阀中的连接螺纹多为符合美国国家标准协会ANSIcrz的锥形阴螺纹,通常用
于DN65和DN80管道上。
a) Threaded-end multi-turn valves, check valves and ball valves with ANSI female taper
threads are most commonly ud with pipe up to 2 1/2” or 3”.
b) 焊接连接端口可以将通径达DN80的青铜多回转阀门、止回阀和球阀直接连接在铜管上。在焊接过程中,
必须要小心谨慎,避免由于温度过高导致阀门受到损害。
b) Solder-end valves permit directly connecting bronze multi-turn valves, check valves and
ball valves up to 3” to copper tubing. Care must be taken not to overheat and damage valves
during the soldering process.
c) 法兰连接常用于DN50以上的多回转铸铁阀门的安装上。
c) Flanged-end connections are the most common ud design for installation of iron multi-
turn valves 2” and larger.
d) 平板(对夹)和凸耳阀体主要用于蝶阀和升降式/双门止回阀上,这种结构的阀门在两个法兰之间安装
容易迅速。
d) Wafer and lug body styles are ud with butterfly valves and lift/double-door check valves
for quick, easy installation between two flanges.
e) DN50以上的管状连接端口的球阀、蝶阀和止回阀安装最迅速。
e) Grooved end ball, butterfly and check valves permit the quickest installation sizes 2”
and larger.
四、室内冷热水系统阀门选型
HOT AND COLD DOMESTIC WATER SERVICE SPECIFICATIONS
通径DN65以下的管线控制阀
LINE CONTROL VALVES 2 1/2” AND SMALLER
球阀:
BALL VALVES:
这类阀门具有额定150 psi的安全工作压力,非冲击冷水压力可达600 psi,两件式铸青铜阀体,聚四氟乙
烯阀座,标准流道,分离式压缩螺母,可调节阀杆填料,防吹出阀杆和镀铬黄铜/青铜球体。在需要关注压降的
地方,应采用不缩径全流道球阀或类似结构的阀门。阀门连接端口应该具有足够深度的美国国家标准协会ANSI
螺纹,或加长焊接端口,并按照美国阀门和管件制造商标准化协会MSS-SP110标准制造。
Valves shall be rated 150 psi SWP and 600 psi nonshock CWP and will have 2-pc. cast bronze
bodies, TFE ats, standard port, parate pack nut with adjustable stem packing, anti-blowout
stems and chrome-plated brass/bronze ball. Where pressure drop is a concern, full-port ball
valves of like construction are to be ud. Valve ends shall have full depth ANSI threads or
extended solder connections and be manufactured to comply with MSS-SP110.
注:如果管道需要保温隔热或绝缘,那么球阀就要配置耐热绝缘材料的2英寸加长手柄,还需要配置