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夾套保溫閘閥

BZ41H BZ40H BZ41Y BZ40Y BZ40R BZ40T BZ41T

保溫閘閥按照標準

1. 設計制造按GB12234-89
   Design Manafacfure According to GB12234-89

2. 結構長度按GB12221-89
   Face to Face ACCORDING to GB12221-89

3. 法蘭尺寸按JB/T79-94
   Flange Dimenaion Accoring to JB/779-94

4. 閥門檢查和試驗按GB13927
   Valve Check and Test According to GB13927