... DN50-600mm 2.Pressure: Class150-2500LB,PN6-253.Material: Cast Iron,Carbon steel,Stainless Steel4.Operation: Hand wheel, gear, square ... and inspection: BS6755, DIN 3230, JIS B2003, API5983) Face to face dimensions: BS5163: 1986, DIN 3202 F4-F5, JIS ... working requirements.product use petrochemical, and other generally applicable to the food industry, cement paper, and environmental protection industries ...