is control unit in the pipeline fluid conveying system, used to change the channel cross-section and flow direction of medium, a diversion, globe, throttle, check, or the overflow pressure relief, and other functions. Used for fluid control valve, from simple cut-off valve to extremely complex automatic control system used in all kinds of valves, its breed and specification is various, nominal size of the valve from the tiny instrument valve to size up to 10 m industrial pipe with a valve. Can be used to control water, steam, oil, gas, mud, all kinds of corrosive medium, liquid metal and radioactive fluids such as various types of fluid flow, pressure Industrial Valves operation can be from 0. 0013 mpa to 1000 mpa ultrahigh pressure, working temperature can c - Ultra-low temperature of 270 ℃ to 1430 ℃ high temperature. The valve maintenance: 1. , long-term storage should be regularly check, for the leakage of machining surface must be clean, clear dirt, storage and ends when the ball valve should be blocked in an open position, gate valve, globe valve, check valve should be blocked and closed on both ends of the channel, neatly stored in indoor and ventilated dry place, do not heap or in open air. 2. Before installation, must be carefully check valve, the pressure of menstruation is in line with the use requirement, eliminate the defects caused by the transportation process, and remove the dirt from the valve parts. 3. When installation, the valve can be connection device in pipeline directly. In general, can be installed on the pipeline at any position, but need to facilitate the maintenance operation, should pay attention to the flow direction of medium cut-off valve is high, the longitudinal disc below lift check valve can only be installed horizontally. 4. Ball valve, cut-off valve, gate valve, when using only do full open or full close, does not allow for regulating flow, lest sealing surface erosion, accelerated wear and tear. On the gate and thread globe valve with arcane device, tighten the hand wheel spin first position, can prevent medium leakage from the packing. 5. Ball valve, cut-off Industrial Valves, gate valve switch application at hand, please do not use leverage or other tools, so as not to damage the valve. The handwheel clockwise to shut down, and vice to open it. 6. Packing gland bolts shall be uniformly tight, should not be pressed into crooked state, in order to avoid collision block valve rod movement or cause leakage. 7. in use process, often should keep clean, drive screw thread must be lubricated periodically. Find fault, should immediately stop using, find out the reason to remove fault.
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