Maintain a rated evaporation to 0.5t / h boiler, installed at least two safety valves; Rated evaporation is less than or equal to 0.5t / h boiler, at least install a safety valve. Separable at the economizer outlet, the outlet of the steam superheater safety valve must be installed. 2, on the explosive or toxic media pressure vessel, the safety valve must be exhausted medium and recovery system safety devices. Installation lever safety valve must remain vertical position, the spring is also the best safety valve mounted vertically V-ball size, so as not to influence their actions. It should also be noted when installing fit and concentricity of parts so that each bolt should be uniform force. Standard safety valve associated with the countries in the world is changing very large V-ball, and many 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. Valve installation and maintenance should note the following construction, installation points 1), the installation location, height, and export orientation must meet the design requirements, note the direction of media flow valve should be consistent with the direction of the standard Weifang arrow on the body, the connection should be solid close. 2), must be visually checked before installing the valve, the valve plate should comply with the provisions of the current national standard GB 12220 "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off valve in the main pipe high quality V-ball, before installation should be the strength and rigorous performance tests, passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal duration of not less than 5min, the valve housing, packing should be no leakage as qualified. Tightness test, the test pressure for the nominal pressure of 1.1 times; the test duration in line with the requirements of GB 50243 1. All kinds of safety valve should be installed vertically. Professional V-ball valve _ _V type valve models Everbright Everbright Limited provided by Shandong valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!