工程规格说明书范文
Sample Engineering Specification

　　所有热塑性塑料阀门应该是对夹蝶阀类型，结构材料采用PVC类型I分类12454或CPVC类型IV分类23447。所有阀门阀座和O形环材质应该是Buna-N, EPDM或Viton®。阀座应该是无衬垫类型并镶嵌在阀门阀瓣上。所有阀门应该内置Santoprene™热塑性塑料弹性材料（TFE）法兰垫圈。对夹式阀门应该安装在两个法兰之间，其螺栓孔模式应该符合美国国家标准协会和美国材料实验协会ANSI/ASTM B16.5 CL 150标准。阀瓣中心点应该配置316L不锈钢阀杆。阀杆应该与处理介质隔离并保持阀杆处于干燥状态。杠杆手柄操作阀门应该配置高强度抗冲击聚丙烯手柄，并有7个位置止动装置和内置锁定装置。齿轮执行机构阀门应该配置位置指示器和高强度抗冲击聚丙烯手轮。在水温23^oC条件下，这种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 valves shall be Wafer Butterfly type constructed from PVC Type I Cell Classification 12454 or CPVC Type IV Cell Classification 23447. All valve seats and O-rings shall be Buna-N, EPDM or Viton®. Seat shall be a non-liner type mounted to the valve disc. All valves shall have built-in Santoprene™ Thermoplastic Elastomer (TFE) flange gaskets. Wafer style valves shall be for mounting between two flanges having bolt hole pattern that conform to ANSI/ASME B16.5 CL 150. Disc shall be centered with Type 316L Stainless Steel Stem. Stem shall be isolated from the process medium for dry operation. Lever operated valves shall be equipped with high impact polypropylene handle having 7-position stops and built-in lockout capability. Gear operated valves shall be equipped with position indicator and high impact polypropylene handwheel. Valves shall be pressure rated at 150 psi for water at 73^oF, as manufactured by Spears® Manufacturing Company.

特点 - PVC, CPVC
Features - PVC, CPVC

　　美国斯毕尔公司对夹蝶阀的多种特点结构结合铺设长度，使其能够直接更换普通铸铁蝶阀如Keystone型号228和Bray系列30蝶阀。这种对夹蝶阀内置Santoprene™热塑性塑料弹性材料（TPE）法兰垫圈，因此易于操作的阀瓣安装式阀座的蝶阀，并且具有与流体介质完全隔离的阀杆结构。可提供的通径范围从DN50至DN200蝶阀供选择，阀座材料有Buna-N, EPDM或Viton®供选择。
　　Spears® Wafer Butterfly Valve is a multi-featured design incorporating laying lengths that allow direct replacement of common Cast Iron valves such as Keystone Model 228 and Bray Series 30 Butterfly Valves. Wafer Valves feature built-in Santoprene™ Thermoplastic Elastomer (TPE) flange gaskets, easy operating disc-mounted seat, and fully isolated stem design. Available in sizes 2" through 8", with choice of Buna-N, EPDM or Viton® Seats.

• 耐化学品和耐腐蚀的PVC或CPVC材料结构
  Chemical & Corrosion Resistant PVC or CPVC Construction
• 特殊设计的铺设长度适用于直接更换普通铸铁蝶阀
  Special Designed Laying Lengths for Direct Replacement of Common Cast Iron Butterfly Valves
• 在法兰面上内置Santoprene™热塑性塑料弹性材料（TPE）垫圈
  Built-in Santoprene™ Thermoplastic Elastomer (TPE) Gaskets on Valve Flange Faces
• 易于操作的阀瓣安装阀座，材质有Buna-N, EPDM或Viton®可供选择
  Easy Operating Disc Mounted Seat in Choice of Buna-N, EPDM, or Viton®
• 完全与流体介质隔离的（干式）实心316L不锈钢阀杆
  Fully Isolated (Dry) Solid Type 316L Stainless Steel Stem
• 可反转的高强度抗冲击聚丙烯杠杆手柄，配置7个位置止动装置和内置锁定装置
  Reversible High Impact Polypropylene Lever Handle with 7-Position Stops and Built-in Lockout Capability
• 备选高效齿轮执行机构，其外壳材质为铸铝，手柄为聚丙烯并内置位置指示器
  Optional High Efficiency Gear Operator with Cast Aluminum Housing, Polypropylene Handwheel and Built-in Position Indicator
• 与美国国家标准协会和美国机械工程师协会ANSI/ASME B16.5 Class 150螺栓模式法兰相一致
  Compatible with ANSI/ASME B16.5 Class 150 Bolt Pattern Flanges
• 在水温23^oC条件下，压力等级为150 psi。
  Pressure Rated to 150 psi for water @ 73^oF (23^oC)

PVC材质阀门快速选型表
PVC Quick-View Valve Selection Chart