室内 - 图1
Indoors – Figure 1

　　美国瓦茨系列007DCDA既可以安装在垂直位置，也可以安装在水平位置。管道应该经过彻底的清洗，在安装之前清除掉外来杂质。应该如图所示安装一个过滤器，位于防回流阀之前，用于防止阀瓣产生不必要的积垢。在管道内安装阀门时要使得阀体上的箭头指向流体的流动方向。对于室内安装，重要的是要使得阀门容易接近，便于检测和维修。不要安装在隐蔽的地方。
　　Watts Series 007DCDA may be installed in either a vertical or horizontal position. Pipe lines should be thoroughly flushed to remove foreign material before installing the unit. A strainer should be installed as shown, ahead of backflow preventer to prevent disc from unnecessary fouling. Install valve in the line with arrow on valve body pointing in the direction of flow. For indoor installations, it is important that the valve be easily accessible to facilitate testing and servicing. Do not install in a concealed location.
　　警告：如果防回流阀安装在只在紧急时候使用，而平时很少使用的水管上，例如消防喷洒系统等管道上，则不要安装过滤器。重要的是要定期检测系列007的性能是否符合当地的有关规定，根据系统的状况，每年至少检测一次以上。
　　CAUTION: Do not install with strainer when backflow preventer is used on seldom-used water lines which are called upon during emergencies, such as fire sprinkler lines, etc. It is important that Series 007DCDA be tested periodically in compliance with local codes, but at least once a year or more often depending upon system conditions.
　　注意：消防系统安装
　　美国消防代理机构指南要求在"主管道"阀门，如关闭阀或防回流阀总成运行后，必须进行一次经过认可的流量检测。必须由经过认证的防回流阀总成检测人员进行这种检测。
　　在流量检测期间，所配置的检测仪表旁路管道上的阀内件，应该关闭。阀内件通过检测后，必须恢复到全开位置。
　　Note Fire Protection System Installations:
　　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. Certified testers of backflow assemblies must conduct this test.
　　The trim valves of the detector meter bypass line, on assemblies so equipped, should be shut off during the confirming flow test. When the test is completed the trim valves must be retuned to a fully open position.

室外 - 图2
Outside – Figure 2

　　在不会发生冰冻现象的地方，系列007DCDA可以安装在建筑物的外面。如果可能的话，最好或者应该安装在地面上。在可能发生冰冻现象的地方，系列007DCDA应该安装在地面上的某个绝缘保温柜内。
　　In an area where freezing conditions do not occur, Series 007DCDA can be installed outside of a building. The most satisfactory installation is above ground and should be installed in this manner whenever possible. In an area where freezing conditions can occur, Series 007DCDA should be installed above ground in an insulated enclosure.

并联 - 图3
Parallel - Figure 3

　　两个或更多的系列007DCDA小通径阀门可以采用并联管道(在经过认可的位置)，以满足更大通径的主供水管道的需求。这种安装形式用于必须保持连续的水供应，或者在检测和应用期间不允许出现中断的地方。此外，这种安装形式还具有提供更大性能的优点，能够满足超过单个阀门性能的要求，使得在检测或应用某个独立的阀门时，不需要关闭整个管道。两个阀门的安装形式，其整体性能应该等于或超过系统的需求。
　　Two or more Series 007DCDA smaller size valves may be piped in parallel (where approved) to serve a larger supply pipe main. This type of installation is employed whenever it is vital to maintain a continuous supply of water/where interruptions for testing and servicing would be unacceptable. It also has the advantage of providing increased capacity where needed beyond that provided by a single valve and permits testing or servicing of an individual valve without shutting down the complete line. For two valve installations the total capacity should equal or exceed that required by the system.
　　并联管道所需的阀门数量应该由工程师根据特定安装的应用环境进行判断决定。(关于流量曲线，请参阅样本F-FC)
　　The quantity of valves used in parallel should be determined by the engineer's judgement based on the operating conditions of a specific installation. (See literature F-FC regarding flow curves)

图1
Figure 1

美国瓦茨
DN50, DN65, DN80, 007DCDA
Watts
2", 2¹/₂", 3" 007DCDA

垂直流向朝上
Vertical Flow Up

图2
Figure 2

WattsBox

现在可提供WattsBox绝缘隔热保护柜
需要更多的资料，请参阅样本ES-WB.
Now available,WattsBox Insulated Enclosures,
for more information, send for literature ES-WB.

图3
Figure 3

美国瓦茨
DN50, DN65, DN80, 007DCDA
Watts
2", 2¹/₂", 3" 007DCDA

过滤器
系列77F-D-FDA
Strainer
Series 77F-D-FDA