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真活接True Union球体止回阀，其结构材料是PVC类型I，ASTM D 1784分类12454或CPVC类型IV，ASTM
D 1784分类23447。所有O形环材质应该是EPDM或Viton®。所有阀门活接头螺母应该是锯齿螺纹。所有阀门部件应该是可更换的。所有阀门应该获得美国国家卫生基金会NSF国际部认证，确认可用于饮用水应用场合。在水温23oC条件下，所有DN15~DN50阀门压力等级应该是235
psi，所有DN65~DN150阀门和所有法兰阀门压力等级应该是150 psi，并由美国斯毕尔制造公司制造。
All thermoplastic check valves shall be True Union
Ball type constructed from PVC Type I, ASTM D 1784 Cell Classification
12454 or CPVC Type IV, ASTM D 1784 Cell Classification 23447. All O-rings
shall be EPDM or Viton®. All valve union nuts shall have Buttress
threads. All valve components shall be replaceable. All valves shall be
certified by NSF International for use in potable water service. All 1/2"
- 2" valves shall be pressure rated at 235 psi and all 21/2"
- 6" and all flanged valves shall be pressure rated at 150 psi for
water at 73oF, as manufactured by Spears® Manufacturing
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特点 - PVC，CPVC
Feartures - PVC, CPVC
流量测试证明这种阀门在工业和化工处理应用领域能够迅速反应、积极密封，有效防止系统回流。可提供国际管道标准的通径DN15~DN100，连接端口为承插、螺纹或法兰的阀门。可提供承插或法兰连接端口的DN150的文氏管阀门（DN100阀门带DN100
x DN150缩径管）。还可提供公制DN20~DN110阀门或英制DN15~DN100螺纹连接端口阀门。注：密封托架不被支撑（对于Safe-T-Blocked®密封托架结构，请参阅真活接True
Union 2000工业球体止回阀）。
Flow tested design provides quick response with
positive seal for prevention of system back flow in industrial and chemical
processing applications. Available in IPS Sizes 1/2"
- 4" with socket, threaded or flanged end connectors. 6" Venturied
valve (4" valve with 4 x 6 reducer) available with either socket
or flanged end connection. Also available with metric 20mm - 110mm or
1/2" - 4" BSP thread end connectors. Note:
Seal carrier is NOT blocked (for Safe-T-Blocked® seal carrier design,
see True Union 2000 Industrial Ball Check Valve).
- 耐化学品和耐腐蚀的PVC或CPVC材质结构
Chemical & Corrosion Resistant PVC or CPVC
Construction
- 坚固的锯齿螺纹活接头螺母
Strong, Buttress Thread Union Nuts
- 完全可维修、完全可更换的部件
Fully Serviceable, Replaceable Components
- 采用标准O形环阀座
Uses Standard O-ring Seat
- EPDM或Viton®材质O形环
EPDM or Viton® O-rings
- 通径DN15~DN50阀门压力等级为235 psi @ 23oC，通径DN65~DN150阀门和所有法兰阀门压力等级为150
psi @ 23oC
Sizes 1/2" - 2"
Pressure Rated to 235 psi @ 73oF, Sizes 21/2"
- 6" and all flanged Pressure Rated to 150 psi @ 73oF
- 适用于水平或垂直安装
Suitable for Either Horizontal or Vertical Installations
- 美国国家卫生基金会NSF认证可用于饮用水应用场合
NSF Certified for Potable Water use
- 适用于真空应用场合
Suitable for Vacuum Service
- 采用无硅树脂、水溶性润滑剂组装而成
Assembled with Silicone-Free, Water Soluble Lubricants
- 制造符合美国材料实验协会ASTM F 1970标准
Manufactured to ASTM F 1970
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