工程规格说明书范文
Sample Engineering Specification

　　所有热塑性塑料止回阀应该是实用压缩旋启式止回阀，结构材料应该是PVC类型I, ASTM D 1784分类12454。所有阀门应该采用无需维护的密封装置结构，并配置EPDM阀座和加重阀瓣。所有阀门应该有外置流向箭头标志。所有阀门应该获得美国国家卫生基金会NSF国际部认证可用于饮用水。在水温23^oC条件下，所有阀门在全流量（开启）位置时压力等级应该是150 psi，而在回压（关闭）位置时压力等级应该是75 psi，并由美国斯毕尔制造公司制造。
　　All thermoplastic check valves Shall be Utility Compression Swing Check type constructed form PVC Type I, ASTM D 1784 Cell Classification 12454. All valves shall be maintenance free seal unit construction with EPDM seat and weighted disc. All valves shall have external flow arrow direction designation. All valves shall be certified by NSF International for use in potable water service. All valves shall be pressure rated to 150 psi for water @ 73^oF in full flow (open) position and to 75 psi @ 73^oF back pressure (closed), as manufactured by Spears® Manufacturing Company.

压缩实用旋启式止回阀快速选型表
Quick-View Compression Utility
Swing Check Valve Selection Chart

特点 - PVC白和PVC透明
Features - PVC White & PVC Clear

　　美国斯毕尔公司压缩实用旋启式止回阀是一种紧凑、高性能止回阀，配置EPDM衬垫压缩式连接端口，便于迅速连接实际的国际管道标准IPS通径官道、塑料或金属管道。无需维护的密封装置结构配置耐用的EPDM弹性材料阀座和加重阀瓣，适用于最大限度减少流动阻力的全流量和积极有效的关闭。采用PVC白或PVC透明材料制造，配置白色压缩连接端口和EPDM阀座。可提供国际管道标准IPS通径DN15至DN100的阀门。
　　Spears® Compresion Utility Swing Valves offer a compact, high performance check valve with EPDM gasketed compression-type ends for fast, convenient connection to virtual and IPS size pipe, plastic or metal. Maintenance-free sealed unit design features long-life EPDM elastomer seats and weighted disc for full flow with minimal restriction and positive shutoff. Produced from PVC White or PVC Clear with White compression end connectors and EPDM seats. Available in IPS Sizes ¹/₂" through 4"

• 保证积极有效密封的标准旋启式止回阀总成
  Standard Swing Check Assembly Maintains a Positive Seal
• 用于迅速连接、使用方便的压缩连接端口
  Convenient Compression Ends for Quick Connections
• 工程设计用于实现最大流量，快速反应和积极有效关闭
  Engineered for Maximum Flow, Quick Response & Positive Shutoff
• 特别适用于泳池和温泉，OEM和通用应用场合
  Excellent for Pool & Spa, OEM and General Purpose Applications
• 紧凑、节省空间的设计结构
  Compact, Space-Saving Design
• 可更换的PVC白或PVC透明密封装置
  Replaceable PVC White or Clear Sealed Unit
• 高等级EPDM阀座
  High Grade EPDM Seat
• 适用于水平或垂直朝上安装
  Suitable for Horizontal or Vertical Up-flow Installations
• 压力等级为150 psi @ 23^oC全流量（开启），和75 psi @ 23^oC回压（关闭）
  Pressure Rated to 150 psi @ 73^oF Full-Flow (open) and 75 psi @ 73^oF Back Pressure (closed)
• 最高工作温度为60^oC
  （温度压力等级将随之降低）
  Maximum Service Temperature 140^oF (temperature/pressure de-ratings apply)

压缩连接件螺母扳手
Compression Coupling Nut Wrenches

压缩连接件螺母扳手套件
Compression Coupling Nut Wrench Sets