工程规格说明书范文
Sample Engineering Specification
所有热塑性塑料阀门应该是Y形止回阀结构,并根据ASTM F 1970标准进行制造,结构材料应该是PVC, ASTM D 1784分类12454,或CPVC,
ASTM D 1784分类23447。所有阀门应该配置锯齿螺纹阀盖和标准O形环类型的阀座阀瓣。所有O形环材质应该是EPDM或Viton®。在水温23oC条件下,所有通径DN15
~ DN50阀门的压力等级应该是150 psi,所有通径DN80 ~ DN100阀门压力等级应该是90 psi,并由美国斯毕尔制造公司制造。
All thermoplastic valves shall be Y-Check configuration
manufactured to ASTM F 1970 and constructed from PVC, ASTM D 1784 Cell
Classification 12454, or CPVC, ASTM D 1784 Cell Classification 23447.
All valves shall have Buttress thread bonnet and standard O-ring type
seating disc. All O-rings shall be EPDM or Viton®. All 1/2"
- 2" valves shall be pressure rated at 150 psi and all 3" -
4" valves shall be pressure rated at 90 psi for water at 73oF,
as manufactured by Spears® Manufacturing Company.
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特点 - PVC灰,PVC透明和CPVC
Features - PVC Gray, PVC Clear & CPVC
美国斯毕尔公司Y形止回阀是一种斜角形止回阀,它通过阀瓣塞自身的重量来自动阻止流体回流。与球体止回阀相比,Y形止回阀比较不会受到湍流的影响,但关闭性能会比较差。可提供PVC灰,PVC透明和CPVC材质的Y形止回阀,可提供的国际管道标准IPS通径范围是DN15至DN100,可提供的连接端口有承插、SR螺纹或法兰,此外还有带承插和SR螺纹端口的真活接类型。
Spears® Y-Check Valves are an angle type check
valve that automatically stops reverse flow by the dead weight of the
disc plug. Y-checks are less affected by turbulent flow and typically
have lower shutoff characteristics than ball checks. Valves are available
in PVC Gray, PVC Clear, and CPVC materials in IPS Sizes 1/2"
through 4" with Socket, SR Threaded or Flanged end connections, plus
True Union styles with Socket and SR Threaded ends.
- 耐化学品和耐腐蚀PVC, PVC透明和CPVC结构材料
Chemical & Corrosion Resistant PVC, PVC Clear,
and CPVC Construction
- 流动特性比球体止回阀有所改善,比弹簧负载结构表现更加优异
Improved Flow Characteristics Over Ball Checks,
Outperforms Spring Loaded Designs
- 易于进入的阀盖便于在线清洗和维修
Easy Access Cap for In-Line Clean Out & Servicing
- 备选的真活接结构,便于阀门维修更换
Optional True Union Design for Easy Valve Service
Replacement
- 标准O形环EPDM或Viton®材质阀座和密封
Standard O-ring type EPDM or Viton® Seat &
Seals
- 通径DN15 ~ DN50压力等级为150 psi @ 23oC,
通径DN80 ~ DN100压力等级为90 psi @ 23oC
Sizes 1/2" - 2"
Pressure Rated to 150 psi @ 73oF,
Sizes 3" - 4" Pressure rated to 90psi @ 73oF
- 适用于水平或垂直朝上安装
Suitable for either Horizontal or Vertical Up-flow
Installations
- 采用无硅树脂、水溶性润滑剂组装
Assembled with Silicone-Free, Water Soluble Lubricants
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