Screw pump pressure and the reasons for the low lift can not reach

the cause of the screw pump pressure can not reach, the cause of the low pressure pump, screw pump head low reason

screw pump outlet pressure is provided by the system for pump flow resistance. Reach the reason probably screw pump pressure or pump does not provide the desired flow, or the system does not provide the desired fluid resistance, this has the potential to be limited into the pump fluid ( The suction pressure of the cavitation or low) 。 Usually accompanied by noise and vibration at this moment, the flow of the pump can not reach the rated flow ( wear and tear, damage or driving speed is too low) , or pump flow around by instead of being transported to the desired system, screw pump pressure to reach the reason may be the discharge valve of the system is opened entirely, incorrect installation, damage or wear. If the pump is relatively new, and not in a environment with abrasive applications, the cause of the screw water pump pressure to reach the largest outlet flow around by. Don't want to like this branch is the most likely path: the system of the pressure reducing valve, leakage of branch voltage regulator, inadvertently open the bypass valve, the valve of any valve seat wear, not completely closed the valve stem, incorrect signal control, damage of spring, etc.

site inspection, if there is no branch interference or pump has correction and many pump can be up and running quickly. If by hand or with a small lever can't smooth pump rotation, then pump could really out of the question. Use visual check the interior of the pump, first need to remove the pump stator to reveal its internal situation, as well as the status of the rotor. At this time should be able to easily see enough to lower the pump pressure ( Fluid Ba loss) The wear and tear.

check whether a valve is sometimes not deserved the bypass is difficult. Method is to remove the valve, partial disassembly, check whether supporting seat, seat sealing surface wear and damage. Check all the spring to ensure that no fracture. If possible, turn the valve by hand of machinery, determine whether there is a resistance and damage.

if screw pump pressure can not meet the reason have not found, shall ensure that the speed of the pump drive has been achieved, and the actual pump shaft rotation at the right speed. For a start of the new system, which is particularly important.

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this paper keywords: reasons for the low pressure pump, screw pump head low reason, the cause of the screw pump pressure to reach

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