unloader valve RB80
unloader valve RB80 The main function of unloading relief valve is to automatically control the unloading or loading of the pump. In view of the function of unloading relief valve, there is a certain difference between unloading pressure and loading pressure. If the difference is too small, the pump unloading and loading action is too frequent; If the difference is too large, the system pressure changes too much.
The difference between unloader valve RB80 loading pressure and unloading pressure is an important performance index of unloading relief valve. Generally, the loading pressure is about 85% of the unloading pressure. The performance is the same as the relief valve.
Main uses of unloading relief valve:
Automatic unloading and loading of pump in accumulator system;
unloader valve RB80 High and low pressure pump combination of large flow low pressure pump unloading
2) unloading valve leakage is a big problem. The seal of the slide valve is not strict or the gap between the slide valve and the sleeve is too small, which causes the slide valve to be stuck and not in place.
3) The problem of slow valve closing after steam turbine opening. After the newly purchased unloading valve is installed, the unit opens the brake, and the valve is closed slowly. It is necessary to check whether the corresponding throttle hole is blocked, or when some manufacturers supply the crisis stopper oil hole with plug, causing the stopper oil leakage not to go, which will cause the slow valve closure problem. In another aspect, the problem should be analyzed from outside the whole EH oil system. There is blockage of the stopper tubing in a factory due to the high regulation door crisis, which causes the slow closing of the high regulation door after the unit opens the brake.
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