Maintenance 1, for the rated steam pressure less than or equal to 3.82MPa boiler safety valve throat diameter of not less than 25mm; For the rated steam pressure is greater than 3.82MPa boiler safety valve throat diameter of not less than 20mm. 2, the valve should normally be installed exhaust pipe, exhaust pipe should be through a safe place, and there is sufficient cross-sectional area, to ensure the smooth flow of the exhaust. Valve exhaust pipe at the bottom should have received a place of safety posturing drainage pipe, the exhaust pipe and the installation of drainage pipe valves are not allowed. Shall be equipped with a safety valve between the pressure equipment Weifang any valve valve, for containing flammable, explosive, toxic container high quality V-ball or viscous media, for ease of replacement, cleaning, can be installed valves, its structure and through diameter size should not impede the normal operation of the safety valve. Normal operation, V-ball valve, globe valve seals must be fully open and add. Safety valves are automatic valves V-ball models, mainly used for boilers, pressure vessels and piping, control pressure does not exceed the value of personal safety and equipment operation plays an important protective role. Standard safety valve associated with the change in the world is very large, and many of them are part of the boiler or pressure vessel belonging to the relevant specifications. Just an overview of some of standards performance requirements, and the variation range of the basic structural details, but did not give specific requirements for size, and other aspects of the throat diameter. Others only with installation and application related. Cross each other in many markets using several standard safety valve is also very common. Shandong valve manufacturers, valve manufacturers Everbright (certified), V-type ball valve Everbright Limited provided by Shandong. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) Shandong Weifang, ball leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Everbright valve leadership with the staff warmly welcome all inquiries negotiations to create a better future for China Everbright valve.