Public GB / T1047-2005 piping element DN GB / T1048-2005 piping components nominal GB / T11698-2008 Marine flanged metal valve structure length GB / T12220-1989 Universal Valve logo GB / T12221-2005 flange connection metal valve structure length GB / T12222-2005 Multi-turn valve actuator connected to GB / T12223-2005 part of the rotary valve drive connection by nominal (1) vacuum valve: the working pressure below the standard atmospheric pressure valve. (2) Low pressure valve: nominal pressure PN ≤1.6Mpa valve. (3) pressure valve: PN nominal pressure is 2.5Mpa, 4.0Mpa, 6.4Mpa valve. (4) high-pressure valve: nominal pressure PN is 10.0Mpa ~ 80.0Mpa valve. (5) high pressure valve: nominal pressure PN≥100.0Mpa valve. (6) Filter: PN nominal pressure is 1.0Mpa, 1.6Mpa Taiwan Toyama Valve Co., Ltd. Suzhou Watts Valve Co., Ltd., the Hong Kong _ valve (Online) _ valve provided by the Dongguan Science and Technology Co., Ltd., the Hong Kong valve. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ming Kong valve leadership with the staff warmly welcome all inquiries negotiations to create a better valve out of Hong Kong in the future.