DIN Non-Rising Gate Valve PN4-160, DN50-1600, F4, F5 Series Design: DIN3352 Face to face: DIN3202, EN558-1 End flange Dimensions: DIN2543-DIN2548, EN1092-1 Pressure test: DIN3230, EN12266-1 The size of serial, valve connecting flange can be design according to customers requirement.