基本安装指南
Basic Installation Instructions

1. 美国瓦茨双止回阀可以安装在垂直或水平位置上。系列7应该安装在水表和水压力调节器的下游。所有出口，包括洒水龙头，必须位于型号7的下游。型号07-S应该安装在连接到主管道的消防喷淋系统处。
   Watts dual check valves may be installed in either a vertical or a horizontal position. Series 7 should be installed downstream of the water meter and of the water pressure regulator. All outlets including sill cocks must be downstream of the Model 7. Model 07-S should be installed at the fire sprinkler service connection to the main line.
2. 这种装置应该安装在一个可以接近的位置，便于拆卸进行维修和检测。
   They should always be installed in an accessible location to facilitate the removal for servicing and testing.
3. 在安装之前，管路管道应该全面彻底进行冲刷，清除外在杂质。
   Pipe lines should be thoroughly flushed to remove foreign material before installing the unit.
4. 防止冻结。
   Protect from freezing
5. 确保阀门按照正确的流向安装。参照阀门铭牌或阀体上的流向箭头。
   Ensure that valve is installed in proper flow direction. Refer to flow direction arrow on valve nameplate or body.
6. 在管路管道上安装阀门时，只能使用所提供的搭扳手平面。不要将扳手应用在阀门的阀体上。这样可以防止阀体和部件扭曲。
   When installing valve in pipe line, only use wrenching flats provided. Do not apply wrench to body of valve. This will prevent distorting the valve body and component parts.
7. 这些配置O形环接头密封的阀门要求对接头螺母进行最低程度的紧固。不要过紧。
   These valves incorporate an O-ring union seal that requires minimum tightening of union nut. Do not overtighten.
8. 这些阀门包括塑料止回模块，不应该直接通过焊接将其连接到管道上。在安装阀门之前，应该先将焊接适配器焊接到管道上。
   These valves contain plastic check modules and should never be directly sweated into the line. Sweat fit adapters should be sweated into the line prior to valve installation.
9. 避免不适当的应用和过量的管道密封剂，如特氟隆生料带和螺纹润滑油。
   Avoid improper application and excessive pipe sealants such as teflon® tape and pipe dope.

　　美国瓦茨产品的规格说明采用美国常用的单位，所采用近似的公制单位仅用于参考。如果需要准确的尺寸，请与美国瓦茨技术服务部门联系。美国瓦茨保留在没有预先通知的情况下，对产品设计、结构、规格或材料进行更改或改进权利，对于以前或以后销售的产品，美国瓦茨不承担因更改或改进所产生的任何责任。
　　Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

　　重要：咨询相关主管部门，了解当地有关安装的要求。
　　IMPORTANT: Inquire with governing authorities for local installation requirements.
　　注：当一个减压阀或双止回阀安装在供水管道上，就产生了一个封闭系统，这就要求管道要满足系统安全的强制性标准。必须特别注意确保配置减压保护装置，以保护热水器设备。重要的是要确保在容积式热水器上安装通过美国国家标准化组织(ANSI) Z21.22认证的温度和压力安全阀。
　　NOTE: When a pressure reducing valve or dual check valve is installed in the supple line it creates a closed system which makes plumbing code compliance imperative for system safety. Special attention must be given by all concerned to assure pressure relief protection is provided to protect water heater equipment. It is important to make certain an approved ANSI
Z21.22 temperature and pressure relief valve is installed on the storage water heater.

高系统压力
High System Pressure

　　在无流动状况下，如果下游系统压力高于设置压力，则可能是由于热膨胀、压力蠕变或阀座上的污垢/堆积物导致的。
　　If the downstream system pressure is higher than the set pressure under no flow conditions, the cause could be thermal expansion, pressure creep or dirt/debris on the seat.
　　当水在一个封闭系统内加热时，就会发生热膨胀。当供应压力超过150 psi，或在供应管道内安装一个止回阀或防回流阀，则这个系统是封闭系统。此时就必须采取措施进行压力释放，以保护管道系统和部件。此时可能需要采用安全阀，如美国瓦茨530C, BRV, Governor 80, 或3L，或者饮用水膨胀罐，如美国瓦茨DET, PLT, ILT或DETA。
　　Thermal expansion occurs whenever water is heated in a closed system. The system is closed when supply pressure exceeds 150psi, or a check valve or backflow preventer is installed in the supply piping. You must make provisions for pressure relief protection of your plumbing system and components. The use of a relief valve such as the Watts 530C, BRV, Governor 80, or 3L or potable water expansion tank such as the Watts DET, PLT, ILT or DETA may be required.

为了确定是否是热膨胀引起的，可以短暂开启冷水龙头进行测试。如果增加的压力是由热膨胀引起的，则压力将立即释放，系统将恢复到设定压力。美国瓦茨提供一种压力检测表，型号276H300，帮助用户确定是否存在高水压。附加在一个软管龙头上的276H300记录下其在系统上的期间所测到的最高压力。 　　To determine if this is the result of thermal expansion, try briefly opening the cold water tap. If the increased pressure is caused by thermal expansion, the pressure will immediately be relieved and the system will return to the set pressure. Watts offers a pressure test gauge, model 276H300 to assist you in determining if you have high water pressure. The 276H300 when attached to a hose bibb registers the highest pressure reading over the period of time it is left on the system.

瓦茨276H300 Watts 276H300

　　注：无论如何也不应该用热水器安全阀替代Governor 80。
　　NOTE: Under no circumstances should the Governor 80 be used in place of a water heater relief valve.