Common problems in plunger valve maintenance

Plunger valve is composed of valve body, valve cover, valve rod, plunger, hole frame, sealing ring, handwheel and other parts When the hand wheel rotates, the valve rod drives the plunger to move up and down in the middle of the hole frame to complete the opening and closing functions of the valve Routine maintenance of plunger valve 1 The plunger valve shall be stored in a dry and ventilated room, and both ends of the passage shall be blocked 2 The plunger valve stored for a long time shall be inspected regularly, the dirt shall be removed, and the processing surface shall be coated with anti rust oil 3 After the installation of the plunger valve, regular inspection shall be carried out The main inspection items are: (1) the wearing of the sealing surface of the plunger valve (2) Wear of trapezoidal thread of stem and nut of plunger valve (3) Check whether the packing of plunger valve is out of date and invalid If it is damaged, replace it in time (4) After the maintenance and assembly of the plunger valve, the sealing performance test shall be carried out.