室内 - 图1
Indoors – Figure 1
适用于室内安装，要注意让总成容易接近，便于检测和维修。如果总成位于靠近墙的管道上，要确保测试旋塞易于接近。排泄管和气隙(或称气隙，请参阅样本ES-AG/EL/TC)应该根据图示从安全阀连接处接出管道，要使得排泄物清晰可见，以避免发生水破坏事故。因此，绝对不要安装在隐蔽的位置。
For indoor installations, it is important that
the assembly be easily accessible to facilitate testing and servicing.
If it is located in a line close to a wall, be sure the test cocks are
easily accessible. A drain line and air gap (see literature ES-AG/EL/TC)
should be piped from the relief valve connection as shown, where evidence
of discharge will be clearly visible and so that water damage will not
occur. Therefore, never install in concealed locations.
室外 - 图2
Outside – Figure 2
在不会发生冰冻环境的区域，系列009可以安装在室外。最好安装在地面，也尽可能以这种方式安装。
In an area where freezing conditions do not occur,
Series 009 can be installed outside. The most satisfactory installation
is above ground and should be installed in this manner whenever possible.
在可能发生冰冻环境的区域，系列009应该安装在地面，并位于保温罩内。系列009必须安装在一个可接近的位置，便于检测和维修。应该在安全阀连接处的气隙(或称气隙)接出排泄管，确保有充分的排泄。不要把排泄管直接插入排泄地漏、污水管或污水坑里。系列009绝对不应该安装在某个部件可能浸在水里的地方。
In an area where freezing conditions can occur,
Series 009 should be installed above ground in an insulated enclosure.
Series 009 must be installed in an accessible location to facilitate testing
and servicing. A discharge line should be piped from the air gap at the
relief valve connection making sure that there is adequate drainage. Never
pipe the discharge line directly into a drainage ditch, sewer or sump.
Series 009 should never be installed where any part of the unit could
become submerged in standing water.
除非绝对必要并通过当地有关规定的认可，否则一般建议绝对不要在坑内更换防回流阀。如果一定要在坑内更换，则推荐安装经过改型的坑。
It is generally recommended that backflow preventers
never be placed in pits unless absolutely necessary and then only when
approved by local codes. In such cases, a modified pit installation is
preferred.
并联 - 图3
Parallel – Figure 3
两个以上较小通径的总成可以(在经过批准后)并联安装，以配合较大的主供水管道。这种安装方式应用在需要增加性能超过了单个总成的性能范围，且允许在不需要关闭整个管道的情况下对某个独立的阀门进行检测或维修。
Two or more smaller size assemblies can be piped
in parallel (when approved) to serve a large supply pipe main. This type
of installation is employed where increased capacity is needed beyond
that provided by a single valve and permits testing or servicing of an
individual valve without shutting down the complete line.
并联的总成个数应该由工程师根据特定安装方式的运行环境进行判断决定。
The number of assemblies used in parallel should
be determined by the engineer's judgement based on the operating conditions
of a specific installation.
对于并联阀门安装，其总成的总性能应该等于或超过系统所需的性能。
For parallel valve installations, the total capacity
of the assemblies should equal or exceed that required by the system.
要求也有必要对所有水系统安全和控制阀门进行年度检测。定期检查、测试和清洗能够保证阀门的使用寿命最长，产品性能正常。
Annual inspection of all water system safety
and control valves is required and necessary. Regular inspection,
testing and cleaning assures maximum life and proper product function. |
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图1
Figure 1
DN65 - DN80, 009
21/2" – 3" 009
图2
Figure 2
DN65 - DN80, 009
玻璃纤维WattsBox
21/2" – 3" 009
Fiberglass WattsBox
现在可提供，WattsBox保温罩，
需要了解更多的资料，请参阅样本ES-WB.
Now available, WattsBox Insulated Enclosures,
for more information, send for literature ES-WB.
DN8 - DN50, 009
WattsBox
1/4"
– 2" 009
WattsBox
现在可提供，WattsBox保温罩，
需要了解更多的资料，请参阅样本ES-WB.
Now available, WattsBox Insulated Enclosures,
for more information, send for literature ES-WB.
图3
Figure 3
DN65 - DN80, 009
21/2" – 3" 009
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