JB / T6900-1993 drain valve JB / T6901-1993 Closed glasses valve JB / T7245-1994 refrigeration apparatus / T7376-1994 pneumatic air valve Technical conditions JB / T7550-2007 air separation equipment with shut-off valve switching valve JB JB / T7745-1995 pipeline valve JB / T7746-2006 necking forged steel valves pneumatic valves and hydraulic pressure based on a certain air, water or oil as a power source, an air cylinder (or cylinders) and the movement of the piston to drive the valve Taiwan Toyama Valve Co., Ltd., general pneumatic air pressure is less than 0.8MPa, pressure or hydraulic oil is 2.5MPa ~ 25MPa. As for driving the diaphragm; rotary gas, liquid drive means for driving the ball, butterfly or plug. Driving force hydraulic actuator big Watts Valve Co., Ltd. Suzhou, suitable for driving large diameter valves. Such as for driving plug, ball and butterfly valves must be reciprocation conversion surface of the piston rotary motion. In addition to the use of an air cylinder or a hydraulic cylinder piston to drive, there is the use of pneumatic diaphragm-driven, and the driving force is small because of the trip, it is mainly used to adjust the valve. 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.