The main components of the piston pump consists of two pendent penicillin vials, a section of hard plastic tube, two steel balls with a diameter of 8 mm and six pairs of penicillin corks. The teaching aids designed by the coastal city of Dalian Su Fu River, has repeatedly won the award. [Method of Making] Referring to Figure 5.16-7, the pump is made of a rigid plastic tube, and the piston is made by relative bonding of a pair of penicillin corkscrews with the appropriate size. Piston rod is selected from a threaded section of the driving spoke, through the above cement bottle stopper, fixed on both sides by a small nut. Two one-way valve is also a penicillin cork by the above method cemented and perforated, with a small steel ball made of. Pump and inlet chamber connected to the side of the tee, and the outlet chamber and the outlet connected to the side, with a pair of cemented penicillin stopper (the size of the valve used to do more), marked hole, and plug Into the glass tube, sealed. Tee pipe can also be made of hard plastic pipe. ã€Usage】 Before use, assemble the components according to Figure 5.16-7, then put the water inlet chamber, tee pipe and pump into the water, the water outlet chamber up, push and pull the piston back and forth to pump water. Run out of the various parts of open preservation, with particular attention to dry the steel ball oiled.
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