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阀门结构种类、材质、认证 Valve Design, Materials, and Approvals |
![]() 美国尼伯科有限公司 |
Valve Design Choices 1. Multi-Turn a) 闸阀 a) Gate b) 截止阀/角-截止阀 b) Globe/Angle-Globe 2. 90o回转阀门 2. Quarter-Turn a) 球阀 a) Ball b) 蝶阀-弹性阀座 b) Butterfly-resilient seated 3. 止回阀(阻止倒流) 3. Check (backflow prevention) a) 旋启式 a) Swing b) 升降式 b) Lift c) 弹簧驱动式 c) Spring-actuated 4. 连接端口 4. End connections |
Materials 1. Bronze (up to 550°F at 150 psi/up to 600 psi at 150°F) 1/4"-3" 2. 铸铁(压力250 psi下温度可达232oC;温度37oC下压力可达500 psi),通径范围:DN50至DN600 2. Cast Iron (up to 450°F at 250 psi/up to 500 psi at 100°F) 2"-24" 3. 球墨铸铁(压力125 psi下温度可达343oC;温度37oC下压力可达600 psi),通径范围:DN50至DN300 3. Ductile Iron (up to 650°F at 125 psi/up to 600 psi at 100°F) 2"-12" 4. 不锈钢(压力125 psi下温度可达343oC;温度37oC下压力可高达2000 psi),通径范围:DN8至DN300 4. Stainless Steel (up to 650°F at 125 psi/up to 2000 psi at 100°F) 1/4"-12" Approvals 1. Manufacturers Standardization Society (MSS) 2. 消防安全认证(UL®和FM) 2. Fire protection (UL® and FM) 3. 州立标准和地方标准 3. State and local codes. |
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