直线形截止阀结构 • 配置用于差压测量的2个测试点 • 整体止动记忆
Straight Pattern Globe • Fitted with 2 Test Points for Differential Pressure Measurement • Integral Memory Stop

在温度79^oC下，额定压力为125 psi (当温度达到最高限度121^oC时，额定压力为85 psi)
Rated 125 psi to 175^oF (max. 250^oF at 85 psi)

S1709

　　合金腐蚀，称为“脱锌现象”，在1950年代已经在阀门产品上有效根除。但是，由于当今在美国国外一般生产的锻造和铸造阀门产品上，高锌合金的使用增加(通常被称为“黄铜”)，现在这个问题又开始回潮。
　　De-alloying corrosion, known as “Dezincification,” was effectively eradicated from valve products in the 1950’s. Today, however, this problem has returned with the increased use of high-zinc alloys (commonly referred to as ‘Yellow Brass’) in forged and cast valves typically produced outside the United States.
　　脱锌现象有选择的从合金中去除锌元素，造成多孔、富铜结构，降低了机械强度。应用中的阀门出现脱锌现象的物理特征是，在产品表面出现粉状物质或矿物污点。作为标准，美国尼伯科青铜/黄铜平衡阀由“抗脱锌”材料制造，是一种优质和耐用的密封材料。
　　Dezincification selectively removes zinc from the alloy, leaving behind a porous, copper-rich structure that has little mechanical strength. The physical attributes of an in-service valve with Dezincification includes a white powdery substance or mineral stains on its exterior surface. As a standard NIBCO bronze/brass balancing valves are made to be “Dezincification Resistant,” which is a seal of quality and longevity.