Safety valve opening and closing pieces by the external force is normally closed state, when the media pressure equipment or piping inside rises above a predetermined value, through the media outside of the system to prevent special valve discharge pipe or equipment exceeds the value of the medium pressure . Safety valves are automatic valves, mainly for boilers, pressure vessels and pipe valve manufacturers, pressure control valve does not exceed the value of Shandong, personal safety and equipment operation plays an important protective role. Nominal pressure: that the safety valve at the highest allowable under normal temperature with pressure, high-temperature equipment used in high temperature material safety valve should not be considered to reduce the allowable stresses. Safety valve is based on the nominal standard design and manufacture. Opening pressure: Also called the rated pressure or tuning the pressure relief valve inlet pressure refers to the valve under operating conditions begin to rise when A21H spring Weiqi threaded valve, safety valve under the pressure, began to have a measurable opening height, state media showed a continuous emission by visual or auditory perception. Valve Co., Ltd. Shandong Everbright valve manufacturer specializing in the production, welcome new and old customers to order our products! In the company of the highest quality at the lowest cost of production of goods and services customers through the complete elimination of waste in order to achieve "high quality, low cost, short delivery time" to meet customer needs. "Zero defect quality products to our ultimate goal," to provide users with a distinguished so satisfied with the quality of their products - Shandong Everbright Everbright Valve Valve Co., Ltd. welcome new and old customers call to order! Weifang valve safety valve manufacturers _ _ Everbright Everbright valve manufacturer provided by Valve Co., Ltd., Shandong. 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!