(1) Different welding rods shall be selected according to different pipes, and the corresponding welding process of non electric ball valve shall be formulated.
(2) Use lifting rings and suspenders to lift parts in sections and put them in place according to the drawing, so as to ensure the clearance and misalignment of the interface between each section of the non electric ball valve.
(3) Fix both ends of non electric ball valve parts on the air duct or pipe by spot welding to ensure the size and airflow direction.
(4) Each section of non electric ball valve parts shall be welded according to the drawing. For those with movable baffles, the movable baffles shall be spliced separately, and the movable baffles and other welding are not allowed (5) Clean up after welding.
(6) Prepare the sealing gasket that meets the temperature and pressure requirements for connecting n flanges according to the operating conditions and drawings, and punch the gasket according to the position of the flange hole.
(7) Install bolts, gaskets and nuts of non electric ball valve and tighten them repeatedly.
(8) Pre compress or stretch according to the size and direction of the non electric ball valve compensation.