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首页Home＞美国尼伯科公司 Nibco Inc＞青铜与铸铁阀门 Bronze & Iron Valve＞正文Text
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如何定购
how to order		 铸铁阀门选配件和附件 - 壳壁开孔，轮榖位置，旁路
Iron Valve Options and Accessories
Wall Tapping, Boss Locations, By-Passes
美国尼伯科有限公司

壳壁开孔
Wall Tapping

无需增加特殊的轮毂即可以在阀门壳壁上开孔的最大管道尺寸
Maximum pipe size that may be tapped in valve wall without adding special bosses.
阀门通径(英寸)
Size of Valve (In.)		 2" 21/2" 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24"
开孔孔径(英寸)
Size of Tapping (In.)		 3/8" 3/8" 3/8" 1/2" 3/4" 3/4" 3/4" 11/4" 11/2" 2" 2" 2" 2" 2"

轮毂位置
Boss Locations

　　所有美国尼伯科铸铁阀门都可开孔用于排泄和特殊用途。轮毂位置、符号和开孔工序符合MSS旁路和排泄连接标准SP-45。（如果需要在标准轮毂位置以外的地方开孔，则必须提供能够清晰显示阀门上开孔准确位置的草图。美国尼伯科公司将进行审核，并告知所需要的开孔是否可行。）所有开孔将免费塞紧。如果要求在轮毂上开孔，则开孔的标准尺寸要符合下列MSS规则SP-45表1的标准。
　　All NIBCO iron valves are available with tapping for drain and special tapping. Boss locations and symbols and tapping procedures are in accordance with MSS By-Pass and Drain Connection Standard SP-45. (When tappings are needed at any other than the standard boss locations, a sketch must be provided clearly showing the exact location on the valve. NIBCO will review the request and advise if request can be met.) All tappings are plugged at no extra charge. When Bosses are ordered tapped, the standard size of tapping is in accordance with the following table taken from MSS Specification SP-45, table 1.

阀门通径(英寸)
Size of Valve (In.)		 2" 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24"
排泄开孔尺寸(英寸)
系列A (蒸汽)
Size of Drain Tapping (In.)
Series A (steam)		 1/2" 1/2" 1/2" 3/4" 3/4" 3/4" 1" 1" 1" 1" 1" 1" 1"

截止阀
Globe
闸阀
Gate
止回阀
Check
角阀
Angle

旁路
By-Passes

　　在打开主阀门之前，可以采用旁路来均衡进口和出口的压力，使得阀门操作更加容易。也可以用来对出口进行预热，和防止由于过于快速膨胀可能导致的损坏。在所有美国尼伯科铸铁阀门上可以配置组合型旁路，并且按照MSS旁路和排泄连接标准SP-45的要求进行安装。在标准铸铁阀门上安装的旁路是一个截止阀。订购时请在型号上加上(Z)，例如：F-000-Z。
　　A By-Pass can be used to equalize pressure at inlet and outlet before opening main valve; facilitates easy valve operation. Can also be used for preheating outlet lines and eliminate damage from too fast expansion. The built up type By-Pass is available on all NIBCO iron valves and is attached in accordance with MSS By-Pass and Drain Connection Standard SP-45. The By-Pass valve used on standard iron valves is a globe valve. Specify by adding (Z) to Fig. No, i.e. F-000-Z.

主阀门通径(英寸)
Main Valve Size (In.)		 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24"
旁路阀门通径(英寸)
By-Pass Valve Size (In.)		 1/2" 3/4" 3/4" 3/4" 1" 1" 1" 1" 1" 1" 1"

　　在美国尼伯科铸铁闸阀、截止阀、角阀和常规旋启式止回阀上的旁路通径符合适用于蒸汽应用的MSS规则SP-45，表II，系列A。
　　Sizes of By-Pass valves on NIBCO Iron Gate, Globe, Angle and regular Swing Check Valves conform to MSS Specification SP-45, Table II, Series A for steam service.
美国尼伯科公司保留在没有另行通知的情况下，改变材料、选配件和附件的权利。
NIBCO INC. reserves the right to change materials, options and accessories without notice.
首页Home＞美国尼伯科公司 Nibco Inc＞青铜与铸铁阀门 Bronze & Iron Valve＞正文Text
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