高度低、紧凑结构的真活接2000球阀具有最丰富的功能，对空间的要求且最小。完全可维护阀门腔也能够与美国斯毕尔公司活接头2000壁厚Schedule 80管道活接头相配合。无论是阀门还是活接头都采用锯齿螺纹活接头螺母，强度极佳。所有球阀都采用美国斯毕尔公司的自我调节浮动阀座结构，使用寿命更长。美国斯毕尔公司的Safe-T-Shear®商标的阀座带双重O形环阀杆密封，确保流体被隔离开来，以防阀门意外被损坏。可提供抗化学品和耐腐蚀PVC或CPVC材质的承插、法兰或美国斯毕尔公司特别加固（SR）螺纹连接端口。
　　The Low profile, compact design of True Union 2000 Ball Valves provides maximum versatility with minimum space requirements. Fully serviceable valve cartridge also mates with Spears® Union 2000 Schedule 80 pipe unions. Both valves and unions utilize Buttress Thread union nuts for superior strength. All ball valves feature Spears® self adjusting Floating Seat design for extended service, and Spears® Safe-T-Shear® Stem with double O-ring stem seals for assurance of fluid containment in case of inadvertent valve damage. Available in chemical and corrosion resistant PVC or CPVC with socket, flanged or Spears® Patented Special Reinforced (SR) threaded.
　　执行机构组件包包括用于阀门/执行器精确对齐并支撑在任何位置的聚丙烯阀门安装支架。高级电动执行器采用通过美国UL认证的双向类型电机，并内置热过载保护装置。齿轮传动机构是永久性润滑，标准配置包括强制手动操作装置。外壳是耐腐蚀聚酯粉末涂层铝，抗风雨的NEMA 4标准，DN15美国标准锥管螺纹NPT管线出口。所有五金件材质都是不锈钢。包括2个单刀双掷限位开关，预置电路为115伏交流电，60赫兹。
　　Actuated package includes polypropylene valve mounting bracket for accurate valve/actuator alignment and support in any position. Premium electric actuator utilizes a reversing type motor with UL approved, built in thermal overload protection. Gear train is permanently lubricated with manual override standard. Enclosure is corrosion resistant polyester powder coated aluminum, weatherproof NEMA 4 rating, ¹/₂" NPT conduit outlet. All hardware is stainless steel. Includes 2-SPDT limit switches pre-wired for standard 115 VAC, 60 HZ.

工程规格说明书范文
Sample Emgineering Specification

　　所有球阀应该是电动驱动真活接2000类型阀门，结构材料采用PVC类型I分类12454或CPVC类型IV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采用锯齿螺纹。所有密封托架应该是Safe-T-Shear®商标阀杆和双重O形环阀杆密封。所有阀门活接头螺母应该是锯齿螺纹。所有密封托架应该是Safe-T-Blocked®。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国际部认证可用于饮用水。在水温23^oC条件下，所有DN15至DN50通径阀门压力额定值为235 psi，所有DN65至DN160和所有法兰阀门压力额定值应该为150 psi。电动执行器应该在工厂安装，115伏交流电，并带热保护、双向电机，以及粉末涂敷NEMA 4标准外壳。所有安装紧固件应该采用不锈钢材质。执行器应该配置[从选配件清单中选择]，并由美国斯毕尔制造公司制造。
　　All ball valves shall be electrically actuated True Union 2000 type constructed from PVC Type I Cell Classification 12454 or CPVC Type IV Cell Classification 23447. All O-rings shall be EPDM or Viton®. All valves shall have Safe-T-Shear® stem and double O-ring stem seals. All valve union nuts shall have Buttress threads. All seal carriers shall be Safe-T-Blocked®. All valve components shall be replaceable. All valves shall be certified by NSF international for use in potable water service. All ¹/₂" through 2" valves shall be pressure rated at 235 psi and all 2¹/₂" through 6" & all flanged valves shall be pressure rated at 150 psi for water at 73^oF. Electric Actuators shall be factory installed, 115 VAC with thermally protected, reversing motor and powder coated NEMA 4 rated enclosure. All mounting fasteners shall be stainless steel. Actuator shall be equipped with [selected options list], as manufactured by Spears® Manufacturing Company.