通径：DN65 - DN80
Size: 2¹/₂" – 3" (65 – 80mm)

　　系列N223B和N223BS超性能水减压阀适用于以可观的幅度降低进水压力，以保护管道系统部件，降低水消耗。这种系列适用于水供应压力高达300psi (21 bars)，调节幅度为25 – 75psi (172 – 517kPa)。标准设置为50psi (345kPa)。系列N223B特点是加大隔膜，弹簧笼和阀座节流孔，适用于超性能应用。系列N223BS除了配置一个过滤器以外，其它部分具有与N223B相同的选项。所有部件都能够迅速和容易的维修，不需要从管线上拆卸下来。标准旁路特点使得由于阀门出口端的热膨胀，超过主管道的压力时，水能够回流到主管线内。
　　Series N223B and N223BS Super Capacity Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. This series is suitable for water supply pressures up to 300psi (21 bars) and may be adjusted from 25 – 75psi (172 – 517kPa). The standard setting is 50psi (345kPa). Series N223B features an enlarged diaphragm, spring cage and seat orifice for super capacity performance. Series N223BS has the same options as the N223B, except it is furnished with a strainer. All parts are quickly and easily serviceable without removing the valve from the line. The standard bypass feature permits the flow of water back through the valve into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main.

特点
Features

• 加大的隔膜，弹簧笼和阀座节流孔，适用于超性能应用
  Enlarged diaphragm, spring cage and seat orifice for super capacity performance
• 青铜阀体结构
  Bronze body construction
• 可在线维修
  Serviceable in line
• 系列N223BS配置独立的过滤器
  Series N223BS furnished with separate strainer
• 标准旁路功能可以控制热膨胀压力**
  Standard bypass feature controls thermal expansion pressure**
• 所有型号上的密封弹簧笼，适用于自来水井内安装
  Sealed spring cage on all models for waterworks pit installations

型号
Models

　　要了解DN15 - DN65螺纹连接类型，请参阅样本ES-223。
　　对于DN80法兰连接类型，请参阅样本ES-N223F。
　　For ¹/₂" – 2¹/₂" (15 – 65mm) threaded connections, refer to
literature ES-223.
　　For 3" (80mm) flanged connections, refer to literature ES-N223F.

规格说明
Specifications

　　在主管道供应压力超过60psi (413 kPa)而要求降低到60psi (413 kPa)及以下的地方，其靠近建筑物进口处的水供应管道上应该安装一个水减压阀。洒水龙头和外墙消防栓根据用户的选择可以保留全主管道压力。当由于阀门出口的热膨胀，使得压力超过主管线的压力时，应该采取措施使得环绕阀门的水从旁路流回到主管线上。配置内置旁路止回阀和过滤器的减压阀是可接受的。这种阀门应该通过美国安全工程师学会ASSE 1003认证。这种阀门应该是美国瓦茨调节阀公司系列N223B或N223BS（带过滤器）。
　　A Water Pressure Reducing Valve shall be installed on the water service pipe near its entrance to the building where supply main pressure exceeds 60psi (413 kPa) to reduce it to 50psi (345 kPa) or lower. Sill cocks and outside wall hydrants may be left on full main pressure at the option of the owner. Provision shall be made to permit the bypass flow of water around the valve back into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main. Pressure reducing valves with built-in bypass check valves and strainer will be acceptable. Approved valves shall comply with ASSE 1003. Valve shall be a Watts Regulator Company Series N223B or N223BS (with strainer).

可提供配置或不配置独立过滤器的类型
Available with or without separate strainer

系列N223B
Series N223B

　　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.