通径：DN10 - DN25
Sizes: ³/₈"– 1"(10 – 25mm)

　　系列289适用于室内家用器具持续压力下防止污染水反虹吸回流到饮用水供应系统中。水供应与空气进口的分离通过隔膜密封的方法实现。在开始运作期间这个功能避免任何泄漏或溢出。
　　Series 289 is designed for indoor point of use applications with continuous supply pressure to prevent backsiphonage of contaminated water back into the potable water supply. Separation of the water supply from the air inlet is accomplished by means of a diaphragm seal. This feature protects against any spillage during start-up operation.

特点
Features

• 适用于持续压力应用的弹簧负载排气
  Spring loaded vent for continuous pressure use
• 专利设计
  Patented design
• 适用于室内应用的防泄漏或溢出隔膜设计
  Spill-resistant diaphragm design for indoor use
• 买得起的设计
  Affordable design
• 易于维修的模块芯
  Modular cartridge for ease of service
• 排气采用一个O形环，运行更加可靠
  Vent uses an O-ring for reliable operation
• 坚固耐用的青铜阀体
  Bronze body for durability
• 紧凑的小型化设计
  Compact space saving design
• 满足美国卫生工程师协会（ASSE）1001标准（仅限于DN10和DN15）
  Meets ASSE 1001 (³/₈" and ¹/₂" only)
• 备选的缎面铬表面
  Optional satin chrome finish

安装
Installation

　　289用于安装在使用点上。当工厂安装在台面上，或机械安装在机械或设备上，289的临界面应该在地面上25毫米处。如果现场应用在常见的管道应用上，则289的临界面应该位于高出地面152毫米的地方。
　　The 289 is designed to be installed at the point of use. When factory installed deck/machine mounted on machines or equipment, the critical level of the 289 shall be 1" (25mm) above the flood rim. If field applied for general plumbing applications, the critical level of the 289 shall be 6" (152mm) above the flood rim.

规格说明
Specifications

　　按照制造商的说明书，正如计划所注明，应该安装一个防泄漏或溢出大气真空断路阀。这种阀门应该由一件式工程塑料模块止回和浮子总成构成，并安装在青铜阀体内。弹簧材料应该是不锈钢。这种阀门结构应该是采用隔膜将空气进口与饮用水供应分离开来以防止泄漏或溢出。这种阀门应该是美国瓦茨系列289。
　　A spill-resistant atmospheric vacuum breaker shall be installed, in accordance with the manufacturer's instructions, as noted on the plans. The valve shall consist of a one piece modular check and float assembly made of engineered thermoplastic and housed in a bronze body. Springs shall be stainless steel. The valve shall be constructed with a molded diaphragm separating the air inlet from the potable water supply to prevent spillage. The valve shall be a Watts Series 289.

系列289
专利号5125429
Series 289
Patent #5125429

1001
仅限于DN10和DN15
³/₈" and ¹/₂" sizes only

典型的化学品分离应用
Typical Chemical Dispenser Application