High temperature deformation and damage, must pay attention
When the bypass valve is open, the liquid is in the case of throttling in the pump constantly circulating, and the more the amount of oil cycle, the longer the cycle, the more serious the heat of the liquid,
If the pump needs to be very low in the oil temperature or high viscosity start, the screw pump should be in the exhaust valve and bypass valve fully open the case, so that the pump starts the lowest load until the prime mover to the rated speed,
Although the screw pump has a dry suction capacity, but must prevent dry rotation, so as not to scratch the working surface.
