The system should be flushed before the backflow valve is installed.
在安装回流阀之前系统应该进行冲刷。
Imports, also known as one-way valve or check valve check valve is automatically prevent fluid backflow valve.
进口止回阀又称单向阀或逆止阀，是能自动阻止流体倒流的阀门。
Headstock piece on media flows and forces open or closed to prevent backflow valve media called a non-return valve.
启闭件靠介质流动和力量自行开启或关闭，以防止介质倒流的阀门叫止回阀。
The paper tells of the regulating principle, method, framework and experimental results of the regulating backflow valve for reciprocal compressor.
介绍了活塞式压缩机可调回流气阀的调节原理、方法和调节机构及其实验结果。
The relief valve may be serviced while on or off the backflow preventer valve.
可以在防回流阀上维修安全阀，或将其从防回流阀拆卸下来维修。
Such as pumping up you must turn off valve to prevent backflow of concrete, then removed the feed tube.
如向上泵送则必须先关闭截止阀，防止砼倒流，然后拆下出料管。
The role of the check valve to prevent water backflow, with the film door, also do not need a check valve.
逆止阀的作用是防止水倒流，有了拍门后，也就不需要逆止阀了。
Double Check Valve Assembly shall be installed at referenced cross-connections to prevent the backflow of polluted water into the potable water supply.
在相关的交叉连接处应该安装一个双止回阀总成，以防止受到污染的水回流到饮用水系统中。
The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.
TK - DL可以检测压力真空断路阀，减压防回流阀或双止回阀总成。
Designed to test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies, allowing you to eliminate both pressure and differential test gauges.
适用于检测压力真空断路阀，减压防回流阀或双止回阀总成，不再需要压力表和压差表。
Air Gap installs easily to the bottom of the 009, 909 and 909rpda backflow assembly relief valve.
气隙很容易安装在在009,909和909rpda防回流阀总成安全阀底部。
The new HP package contains quality Watts components … including the new AS-B Bronze Air Scoop and the B911S Combination Bronze Fill Valve and Backflow Preventer.
最新的HP组件包内含优质的美国瓦茨部件，包括：新型AS-B青铜导气罩和B911S青铜进水阀和防倒流装置组合件。
NOTE: For Australia and New Zealand, Pipeline strainers should be installed between the upstream shutoff valve and the inlet of the backflow preventer.
注意：适用于澳大利亚和新西兰：管路过滤器应该安装在上游关闭阀和防回流阀进口之间。
First: to act as an automatic non-return valve by preventing a backflow of steam from the main steam header to the boiler.
首先，能过作为一个自动逆止阀，防止蒸汽从主蒸汽加热器上倒流到锅炉里。
Reversed flow is stopped or held in "check" by fluid backflow pressure which seats the closure device against the valve body.
倒流的流体通过倒流的流体压力将止回关闭装置与阀体紧密密封，从而实现阻止倒流的“止回”功能。
The design of the slanting valve trap keeps the valve door tightly closed when the pressure from the backflow gets higher, allowing the valve trap to perform its best function.
活门的斜角位设计，当回流压力越大，活门越能紧闭，发挥最佳的防回流功能。
When cleaning, the valve of the pipeline controls the backflow of the liquid with convenience.
清洗时由管路阀门控制液体倒流，十分方便。
The installation of a strainer ahead of the backflow preventer is recommended to prevent fouling of the check assembly and resultant spillage from the valve during repressurizing.
建议在防回流阀前安装一个过滤器，防止止回阀受到污染和阀门在再增压期间出现泄漏或溢出。
The National Fire Protection Agency (NFPA) Guidelines require a confirming flow test to be conducted whenever a "main line" valve such as the shutoff valves or a backflow assembly have been operated.
美国国家防火协会（NFPA）指导原则要求对于主管线上运行的阀门，如关闭阀或防回流阀总成，必须进行流量测试。
DUAL CHECK VALVE BACKFLOW PREVENTER For low hazard cross-connections. Continuous pressure applications.
双止回防回流阀用于低危险交叉连接。持续压力应用场合。
The echocardiogram is a painless test that's used to look for prolapse of the mitral valve flaps and for backflow (regurgitation) of blood through the leaky valve.
这项检查没有痛苦，主要用于检查二尖瓣的脱垂和血液通过渗漏二尖瓣的反流情况。
The echocardiogram is a painless test that's used to look for prolapse of the mitral valve flaps and for backflow (regurgitation) of blood through the leaky valve.
这项检查没有痛苦，主要用于检查二尖瓣的脱垂和血液通过渗漏二尖瓣的反流情况。
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