| 摘要 |
A plunger pump apparatus for treating wastewater is provided to overcome a water pressure applied to a filter section and to flow backward easily a piston by moving the piston easily from the undercurrent space of the valve housing by operation of a pressurizing cylinder receiving a pneumatic pressure or a fluid pressure. A plunger pump apparatus for treating wastewater comprises a housing(142), a piston(150) and a pressurizing cylinder(152). The housing provides an undercurrent space(143) in which product water of waste water in which contaminants are disposed is flown from a filter section and has an outlet(145) ejecting the product water of the undercurrent space. The piston pressurizes the product water of the undercurrent space of the valve housing, and blocks the outlet and flows backward to the filter section(100). An end part of the valve housing is combined to the pressurizing cylinder. The pressurizing cylinder linearly moves the piston in the undercurrent space. |
