Bitumen=asphalt. Some customers buy bitumen pump not for a long time after the failure, in fact, there is a large part of the customer caused by the phenomenon of short pump life, the following brief talk about how to prolong the service l

When the valve is opened for a long time and only closed for a short time, the normally open asphalt gear pump should be selected. And ensure that the installation of the body arrow should be consistent with the flow of the medium, not ins