(1) Haidun is a V-type ball valve, knife-type gate valve, ball valve and butterfly valve. It covers most of the control valves and switching valves on the pipeline, providing customers with one-stop procurement services.
(2) Haidun has the design and manufacturing capability of the actuator at the same time of producing the valve, and has a complete accessory supply chain to provide customers with complete control valve solutions to reduce the procurement cost of customers.

(1) The company has set up a full-time quality inspection department, and has a professional and excellent quality inspection team. From raw materials entering the factory to process inspection, and then finished products are strictly in accordance with the standard requirements to ensure the pass rate;
(2) Conduct monthly employee quality awareness training, give feedback and quality rewards and punishments for quality problems in the processing process, and form “not accepting non-conforming products, not manufacturing non-conforming products, and not disposing of non-conforming products” within the enterprise. The quality of the three is not the principle, forming a layer of checks;
(3) A variety of testing equipment, spectrometer, wall thickness gauge, hardness tester, coating thickness gauge, various specifications test press, roughness tester and other testing equipment to ensure that each valve is qualified The rate reaches 100%.
(4) The product fully covers the IOS9001 quality assurance system, and has passed the TS Special Equipment Certification of the AQSIQ and the CE certification of the European Community.

Provide daily maintenance and maintenance of valves and common troubleshooting services; provide remote or on-site valve re-inspection, installation and use of technical guidance; user quality complaints, after telephone technical support, if further needs, will be professional after-sales service The personnel arrive at the on-site service within the first time; the user's technical quality consultation, reply within 24 hours; provide quality assurance period of 18 months after the factory or 12 months after installation: provide 24-hour technical support hotline; free of charge during the warranty period Provide various forms of after-sales service for users, provide products for life after-sales and paid service within the warranty period, and provide free supply of consumable parts within three years.