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Variable pump pressure adjustment steps

　　1) Adjust the pressure of unloading valve DA10, relief valve DB10 or DB20 to the minimum. 　　 2) Check in the slurry inlet valve and close the slurry outlet valve to the minimum, that is, the slurry flow rate of the pump is small at this time. 　　 3) Start the motor, slowly adjust the relief valve DB10 or DB20 to adjust the mud pressure to be about 0.1Mpa-0.2Mpa less than the required pressure. 　　 4) Slowly adjust the unloading valve DA10 until the unloading valve has pressure (that is, the pressure gauge corresponding to the unloading valve shows less than 0Mpa). 　　 5) If the state cannot be reached, adjust the unloading valve and the relief valve according to the above steps 3 and 4 until this state. 　　 6) After adjusting the unloading valve, tighten the nut. (Note: The pressure of the unloading valve should be zero at this time, if it is not zero, then slightly lower the pressure of the unloading valve, and the pressure will only be displayed when it reaches zero). 　　 ...
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Improvement of oil circulation structure of rotary vacuum pump

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Based on rotary vane vacuum pump oil seal type something in industry application, makes the general rotary vane vacuum pump oil seal type medium vulnerable to pollution, emulsification and failure, still can cause oil hole plugging and exhaust valve damage, resulting in waste of oil pump, pump maintenance rate increased pump damage, even cause significant cost burden to users. If switch to other types of vacuum pump, such as slide valve pump, water ring pump, oil ring pump or dry pump, or the same results, or the performance can not meet the requirements or the cost can not afford. In view of the above situation, the oil circulation structure of the general oil-sealed rotary vane vacuum pump has been greatly improved. The oil of the existing general oil-seal rotary vacuum pump is discharged from the exhaust valve and then directly enters the pump chamber again. When the pump stops, the oil is easy to return into the pump chamber, causing the next start difficulty and oi...
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COPPER SOLDER VACUUM BRAZING DIAMOND

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VACUUM BRAZING DIAMOND DESCRIPTION: Current monolayer diamond grinding tool used in the industrial USES electroplating products, mostly due to a combination of coating and metal substrate and abrasive interface does not exist solid metallurgy chemical combination, abrasive just mechanical embedding framed in coating metal, thus holding force is not big, in the high efficiency grinding load heavy homework, abrasive easily for grinding grain fall off or peeling off and cause the overall failure of coating and to increase the holding force will have to increase the coating thickness, the result of abrasive dust exposed height and the space of reduced, grinding wheel easily blocked. Abroad since the early 1990 s, the research use high temperature brazing instead of developing a new generation of electroplating monolayer diamond tool, its starting point is to use in diamond, when high temperature brazing filler metals with parent metal interface on the possibility of interactions, such...
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