1.advanced lost foam casting
2.much experience in valve-making
3.quanlity control and CE certificcate

 components:

1.body:cast iron or ductile iron

 2.bonnet:ductile iron or cast iron

 3. wedge:ductile iron with NBR/EPDM/FPM

4.stem:stainless steel

 design

 face to face is according to BS,DIN,ANSI,AWWA,SABSstandard

test:

1.working pressure : PN10  PN16

 2.shell pressure :   1.5Mpa  2.4Mpa

 3.seat pressure:   1.1Mpa   1.76Mpa