Product features 
· DN50-DN4500, PN6/10/16/25, 
·To DIN3352 or API609
· Face to face per DIN3202/ISO5752
· Flange ends dimension DIN2501/ANSI B 16.5/ANSI B 16.47
· Final inspection tests to API598/DIN3230.
Materials
· Body and disc: Cast iron, ductile iron GGG40/GGG50/WCB/SS
· Shafts of stainless steel 2cr13
· Disc sealing ring in replaceable NBR/EPDM rubber.
· Seat face weld with copper alloy, micro finished.
Corrosion protection
· Inside and outside epoxy coating
· Applicable temperature: -20°C--100°C (Different raw material for different work temperature )
· Applicable medium: Water, oil, gas and other causticity medium (different raw material for different medium)