1. Relevant procedures that should be completed before the installation of the electric ball valve, such as flaw detection, heat treatment, pressure test, cleaning, degreasing, internal corrosion prevention and lining, have been completed and meet the requirements;
2. The civil works related to the electric ball valve have been completed and passed the joint inspection of relevant personnel of the civil engineering and installation unit. During the inspection, the pipe support foundation, pipe bridge, pipe pier, pipe trench, cushion, valve well, as well as the embedded parts, reserved holes, waterproof shoulders, etc. used for the electric ball valve shall be checked according to the drawings, and must meet the design requirements and installation requirements. Both civil engineering and installation parties shall countersign for approval;
3. The inside of pipes, pipe sections, pipe fittings, valves, etc. has been reasonably clean, and no dirt or sundries are left;
4. The pipes, electric ball valves, valves, gaskets, etc. have been checked according to the design requirements, and their materials, specifications and models are correct; The prefabrication quality of electric ball valve meets the requirements;
5. Pipes, pipe fittings and valves have passed the inspection and have the required technical certificates;
6. Check the position and quantity of the guard plate for installing or welding the electric ball valve support and hanger on the equipment to meet the requirements for the installation of electric ball valve and electric ball valve.
7. The equipment connected by the electric ball valve is aligned and fixed, the secondary grouting meets the requirements, and the notice of piping permission is obtained. 8. For the electric ball valve with inner sleeve, the direction of the inner sleeve shall be consistent with the flow direction of the medium, and the hinge rotation plane of the hinged electric ball valve shall be consistent with the displacement rotation plane.
9. For the electric ball valve requiring cold tightening, the auxiliary components used for pre deformation shall be removed after the pipeline is installed.
10. It is forbidden to adjust the installation of electric ball valve out of tolerance by means of deformation of electric ball valve, so as not to affect the normal function of electric ball valve, reduce the service life and increase the load of pipeline system, equipment and supporting components.
11. During installation, welding slag is not allowed to splash on the surface of the corrugated shell, and the corrugated shell is not allowed to suffer from other mechanical damage. 12. After the installation of the pipeline system, the yellow auxiliary positioning components and fasteners used for installation and transportation on the electric ball valve shall be removed as soon as possible, and the limit device shall be adjusted to the specified position according to the design requirements, so that the pipeline system has sufficient compensation capacity under environmental conditions.
13. All moving elements of the electric ball valve shall not be blocked or restricted by external components, and the normal action of all moving parts shall be ensured. In line with the enterprise principle of cooperation and dedication, and users' peace of mind, our factory devotes excellent products and perfect services to our customers with the enterprise spirit of honesty, realism and pragmatism. Dongfeng Company is willing to pursue zero defect product quality with high-quality and advanced products, perfect after-sales service, and the business philosophy that customers are always God. We sincerely invite new and old customers to visit us for guidance, negotiation and cooperation, and create a win-win situation.