工程规格说明书范文
Sample Engineering Specification

　　所有热塑性塑料阀门应该是旋塞闸阀类型，结构材料采用PVC类型I，ASTM D 1784分类12454或CPVC类型IV，ASTM D 1784分类23447，配置聚丙烯阀盖和高强度抗冲击聚丙烯手轮。所有阀门应该是不升杆（暗杆）阀杆和旋塞型聚乙烯闸阀， 并配置应变力平衡的螺纹。所有阀门部件应该是可更换的。在水温23^oC条件下，所有DN15 ~ DN50通径的阀门压力等级应该是235 psi，所有法兰连接且通径DN15 ~ DN150的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 Plug Gate style constructed from PVC Type I, ASTM D 1784 Cell Classification 12454 or CPVC Type IV, ASTM D 1784 Cell Classification 23447, with Polypropylene bonnets and high impact Polypropylene hand wheel. All valves shall have non-rising stem and Plug-style Polyethylene gate with Strain-Equalizing thread. All valve components shall be replaceable. All ¹/₂" - 2" valves shall be pressure rated to 235 psi and all flanged valves ¹/₂" - 6" to 150 psi for water @ 73^oF, as manufactured by Spears® Manufacturing Company.

快速阀门选型表
Quick-View Valve Selection Chart

特点 - PVC，CPVC
Features - PVC, CPVC

　　美国斯毕尔公司旋塞闸阀采用圆柱形“旋塞类型”闸阀结构，具有更加均衡一致的密封和积极有效的关闭性能。低高度，紧凑型结构和不升杆（暗杆）阀杆节省了空间，因此能够满足大多数应用环境的要求。美国斯毕尔公司应变力平衡阀杆/楔子结构结合改进的聚丙烯阀盖，使得这种闸阀成为目前市面上最可靠的热塑性塑料闸阀之一。这种闸阀采用PVC或CPVC阀体材质，承插和SR螺纹连接方式的闸阀其通径范围为国际管道标准IPSDN15 ~ DN50，法兰连接端口的闸阀通径范围为DN15 ~ DN150。
　　Spears® Plug Gate Valve utilizes a cylindrical "plug-style" gate for more uniform sealing and positive shutoff. Low-profile, compact design and non-rising stem saves space for the most demanding applications. Spears® Strain-Equalizing stem/wedge design combined with improved Polypropylene bonnet makes this one of the most reliable thermoplastic gate valves available. Valves are produced from PVC or CPVC bodies in IPS sizes of ¹/₂" - 2" with Socket & SR Threaded or ¹/₂" - 6" Flanged end connections.

• 耐化学品和耐腐蚀PVC或CPVC材料结构，带聚丙烯阀盖
  Chemical & Corrosion Resistant PVC or CPVC Construction with Polypropylene Bonnet
• 聚乙烯旋塞类型闸阀提供圆柱形内部密封
  Polyethylene Plug-Style Gate Provides Cylindrical Internal Seal
• 不升杆（暗杆）阀杆，配置专利的应变力平衡螺纹
  Non-Rising Stem with Patented Strain-Equalizing Threads
• DN150通径阀门内置位置指示器
  6" Valve Features Built-in Position Indicator
• 高强度抗冲击聚丙烯手轮
  High-Impact Polypropylene Hand Wheel
• 采用维修组件完全可在线可维修，或者完全能够内部更换阀筒
  Fully Serviceable In-Line with Repair Kits or Full Internal Replacement Cartridges
• Buna-N, EPDM或Viton®材质O形环密封
  Buna-N, EPDM or Viton® O-ring Seals
• 通径DN15 ~ DN50阀门压力等级为235 psi @ 23^oC
  Size ¹/₂" - 2" Pressure Rated to 235 psi @ 73^oF
• 适用于真空应用
  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
• 可提供2英寸方形/T形操作螺母供选择
  Optional 2" Square/T-Style Operator Nut available.

旋塞闸阀O形环维修组件
Plug Gate Valve O-ring Repair Kit

　　所有组件包括阀杆O形环（2件），阀盖O形环（1件）
　　All kits include Stem O-ring (2), Bonnet O-ring (1).

旋塞闸阀内部更换阀筒
Plug Gate Valve Internal
Replacement Cartridge

　　内部更换阀筒包括完整的、完全能够组装的手柄螺母，阀杆O形环，阀盖O形环和能够直接插入现存阀体内的闸部件。
　　Internal Replacement Cartridge includes complete, fully assembled Handle Nut, Stem O-ring, Bonnet O-ring, and Gate for direct insertion into existing valve body.