... InspectionMSS SP81,MSS SP61,API598,ISO5208Type Of OperationGear,Electric,Pneumatic,Manual-Air-HydraulicDN(NPS)2"~24"PN(LB)Class 150LB91. ... not easy to block ash and deposition. 3, The valve is sealed with high quality ceramic, and has high mechanical strength ... ;designing, manufacturing and marketing advanced technology steel valves in a broadrange of types and sizes. Our products include various ...