°F/°C 温度
°F/°C Temperature |
ASTM A 126
铸铁
ASTM A 126
Cast Iron |
ASTM A 395
*球墨铸铁
ASTM A 395
*Ductile Iron |
ASTM A 216 WCB
铸钢
ASTM A 216 WCB
Cast Steel |
* 这些等级适用于温度超过232°C,且阀内件是316不锈钢的情况。如果采用ASTM B 584阀内件,最高温度限制为232°C。
** 工程注意:按照ANSI B 16.42标准,球墨铸铁法兰额定为250 psi。然而,美国尼伯科希望表明,在150磅级法兰之间,这些阀门能够在285 psi压力下持续工作。
* These ratings apply when temperature exceeds 450°F and the valve has 316 SS trim. When ASTM B 584 trim is used, maximum temperature limit is 450°F.
** Engineering Note: Ductile Iron flanges are rated at 250 psi in accordance with ANSI B16.42. However, NIBCO's rating is intended to show that the valve is capable of sustained operation at 285 psi, in between Class 150 steel flanges. |