... .Special design project 5.passed ISO9002 About factory: TIANJIN WORLDS VALVE Co., Ltd. is a production, sales and service as ... . Horizontal and vertical ascending working position, andVATAC Through Conduit Gate Valves are with Features as below:Available in Double Disc ... Manual, Electric, Hydrau-Pneumatic Actuator Design Codes API 6D, ANSI B16.34, ANSI 16.5, ASME VIII, API 6FA. Quality Assurance ...