1. 在安装之前，要确保管道连接端已经经过铰孔，螺纹有足够的长度。吹出管道内可能损害阀门阀座的所有疏松的氧化皮和其他外来物质。
   Before installing, be sure pipe ends are reamed and threads are cut to size. Blow out lines to remove all loose scale and other foreign matter that can damage valve seat.
2. 在管线内安装调节阀，使得阀体上的箭头指向流体流向。
   Install regulator in the line with the arrow on the body pointing in the direction of flow.
3. 按照图示，在距离隔膜腔室最少18英寸的减压管上连接DN6或DN10平衡管，如果离调节阀的距离能更远则更好。
   Connect ¹/₄" or ³/₈" equalizer pipe as shown from the diaphragm chamber to a point in the reduced pressure line not less than 18" but preferably a greater distance from the regulator.

4. 在控制管线上安装一个针形阀。如果压力不均匀，则将导致调节阀波动。可以通过对阀门进行节流来稳定这种波动。
   Install a needle valve in the control line. If uneven pressure should cause the regulator to pulsate, its action can be stabilized by throttling the valve.

　　注：压力安全阀的标准配置是15英寸直径腔室，工厂设置压力为60 psi以保护腔室压力不会过大。在安全阀上应该附加一条排放管，将任何潜在的排放引导能够处置的安全地方。
　　NOTE: 15" diameter chambers are standardly furnished with a pressure relief valve, factory set at 60 psi to protect the chamber from excessive pressure. A drain line should be attached to the relief valve to channel any potential discharge to a safe place of disposal.

重要
IMPORTANT

　　如果采用减压阀，将形成一个封闭系统；因此必须在调节阀的下游位置安装一个压力安全阀，以保护设备不会由于室内热水供应容器或热水器造成的水膨胀而变得压力过大。
　　When a reducing valve is used, it makes a closed system; therefore, a pressure relief valve must be installed in the downstream side of the regulator to protect equipment against excess pressure which is built up by the expansion of water from the domestic hot water supply tank or heater.

　　*注：如图所示，始终将平衡管连接进直线管道内。
　　*NOTE: Always connect equalizer pipe into a straight run of the line, as shown.
　　调节：当隔膜位于管道上方时，从左到右旋转调节轴套，以增加减压 - 相反就是减少减压。
　　TO ADJUST: When diaphragm is above the line, turn adjusting collar from left to right to increase the reduced pressure - opposite to decrease reduced pressure.
　　当隔膜位于管道下方，则从右到左旋转调节轴套增加减压 - 相反就是减少减压。提供一条钢条用于旋转调节轴套。
　　When diaphragm is below the line, turn adjusting collar from right to left to increase the reduced pressure - opposite to decrease the reduced pressure. A steel rod is provided to turn adjusting collar.

型号127W推荐安装方式
No. 127W Recommended Installation

　　用较小通径的调节阀进行串联安装，以改善系统性能，延长阀门的使用寿命。
　　Installed in tandem with smaller size regulator to improve system performance and extend valve life.

*1英寸通径的No. 223调节阀用于处理较低的需求。比127W的压力设置高10 psi。
*One inch size No. 223 regulator to handle low demands. Set 10 psi higher than 127W.
*这种选择性安装能够提供最好的维护维修性，以及更好的调节功能，更适合经常出现超低需求的安装位置。较小的调节阀用于低流量需求，延长大阀门的使用寿命。
*This optional installation provides greatest maintenance
serviceability and better regulation for installations where
extreme low demand periods are frequent. Smaller regulator
serves low volume demands, extending life of larger valve.

　　如果阀杆周围出现泄漏，则轻轻紧固填料螺母。如果轻轻紧固螺母无法阻止泄漏，则重新安装填料。不要过紧旋转填料螺母，以免粘接阀杆。这将导致调节不均匀和阀杆磨损过度。
　　Tighten packing nut lightly if leaks occur around stem. Repack stem when light nut pressure cannot stop leak. Do not tighten packing nut enough to bind stem. This causes uneven regulation and excessive stem wear.
　　清洗：检查或更换磨损的阀门阀瓣，断开控制管线，采用钝工具和锤打阀盖凸耳从阀体上旋下阀盖。将这个顶部提起，清洗阀体。
　　TO CLEAN: Inspect or replace worn valve disc, disconnect control pipe and unscrew bonnet from valve body using blunt tool and hammer on bonnet lugs. Lift entire top work clear of body.