Double Flanged End Double Disc Check Valve is used for pipes under following conditons: nominal pressure 1.0 Mpa-42.0 Mpa, Class150~2500; nominal size DN15~1200mm; working teperature: -196~560℃. Applying different materials, it can be used for water, steam, oil, nitric acid, acetic acid, oxidizing liquid and carbamide etc.
First, the standards and specifications:
Inspection and test: API598,JB/T9092;
Design and manufacture:API594,API 6D,JB/TB8937;
Face to face and end to end:API594,API6D,DIN3202,JB/T8937;
Pressure-temperature rating:ASME B16.34,DIN2410,GB/T9124,HG20625,SH3406,JB/T74;
Pipe flange: JB/T74~90,JB/T9112-9124,HG20592~20635,SH3406,ASME B16.5,DIN2543~2548,GB/T13402,API605,ASME B16.47.
Second, the structural characteristics:
Short structural length,only 1/4~1/8 of that of traditional flanged check valve;
Low volume,light weight,only 1/4~1/20 of those of traditional flanged check valve;
Applicable for and easily installed for vertical or horizontal pipelines;
Quick valve disc closedown, low water hammer pressure;
Smooth flow passageway and small fluid resistance;
Narrow valve travel and small closedown impact;
Flexible action and good sealing performance;
Long service life and good reliability.