JB / T2775-1992 PN16.0 ~ 32.0MPa nut JB / T2776-2010 PN16.0 ~ 32.0MPa lens pad JB / T2777-1992 PN16.0 ~ 32.0MPa nonporous lens pad JB / T2778-2008 PN16.0 ~ 32.0 MPa fittings and fasteners temperature mark JB / T5298-1991 Pipeline steel plate valve JB / T5299-1998 hydraulic butterfly check valve JB / T6441-2008 valve compressor valve actuators disadvantage is complex structure of Taiwan Toyama valve Ltd., in a damp location is more difficult Kaiheng Valve Co., Ltd. in Guangzhou, when used in explosive medium, you need to use explosion-proof measures. Valve actuators driven by different types of valves Shanghai Guanlong valve Machinery Co., Ltd., Z and Q can be divided into two categories. Output shaft Z type valve electric device can turn out a lot of laps, suitable for driving valve, closing valves, diaphragm valves, etc; Q output shaft type rotary valve actuators only 90. Suitable for driving plug, ball and butterfly valves. According to their type of protection are common type, flameproof (expressed in B), heat-resistant (represented by R) and triple-type (ie outdoor, corrosion, explosion, represented as S). Tianjin Tanggu valve limited liability company, the Hong Kong valves (online consultation), the 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.