The pressure relief valve of the jack should be closed. If it is open, you have to close it by twiddling the jack lever clockwise. Also, examine if there is a fluid leak or any damaged part. You should never use a jack that shows any sign of disrepair. A hydraulic floor jack is ...
ThePosiTestAT-MManual Adhesion Testerfeatures a manual hydraulic pump designed to apply smooth and continuous pressure with a single stroke, a pull rate indicator to manually monitor and adjust the rate of pull, and an internal memory that stores all the data of a pull-off test for up to 200...
It allows vacuum relief for dispensing operations, and provides emergency pressure venting n the event of a fire. Without a safety drum vent, a fire can turn a drum of flam- mable liquids into a bomb. In dispensing flammable or combustible liquids ...
if the pressure in creases too much because of a downstream blockage, the relief valve opens. A. 如果是由于下游破损造成压力下降太多,释放活门就会打开。 B. 如果是由于下游阻塞造成压力上升太多,释放活门就会打开。 C. 如果是由于下游反流造成压力上升太多,释放活门就会打开。 查看完整题目...