• 1.Design and manufacture:API594,API 6D,JB/TB8937;
  2.Face to face and end to end:API594,API6D,DIN3202,JB/T8937;
  3.Pressure-temperature rating:ASME B16.34,DIN2410,GB/T9124,HG20625,SH3406,JB/T74;
  4.Inspection and test: API598,JB/T9092;
  5.Pipe flange: JB/T74~90,JB/T9112-9124,HG20592~20635,SH3406,ASME B16.5,DIN2543~2548,GB/T13402,API605,ASME B16.47. 

Structural Feature

1.Short structural length,only 1/4~1/8 of that of traditional flanged check valve;

2.Low volume,light weight,only 1/4~1/20 of those of traditional flanged check valve;

3.Quick valve disc closedown,low water hammer pressure;

4.Applicable for and easily installed for vertical or horizontal pipelines;

5.Smooth flow passageway and small fluid resistance;

6.Flexible action and good sealing performance;

7.Narrow valve travel and small closedown impact;

8.Integrated structure,simple and compact,in beautiful shape;

9.Long service life and good reliability.