When the pneumatic valve performance testing valve of a standard volume manufacturing Z341F pneumatic valve vendors, should be entrusted to an authoritative organization for testing the performance of the following: ① valve pressure in the working conditions of the opening and closing torque; ② pressure in the working conditions of pneumatic Shandong Z341F valve, the valve is closed tightly to ensure a continuous opening and closing times; detecting flow resistance coefficient ③ valve in the pipe-borne water conditions. Valve at the factory should be detected following: ① valve in the open position, the valve shall be subjected to internal pressure is detected twice the value of the working pressure valve; ② valve closed condition Z341F pneumatic valve manufacturers, both sides were to withstand 1.1 times working pressure valve value, no leakage; but the metal sealing butterfly valve, leakage is no greater than the relevant requirements. Pneumatic valve is a device in the factory manual should indicate the following data: Valve specifications; Model; working pressure; manufacturing standards; body material; Stem material; sealing material; valve shaft packing material; stem sleeve material; internal and external corrosion Material; Operation Starting direction; hoist pressure in the working condition moment;; factory Make revolutions; the date of manufacture; serial number; weight; connecting flange apertures, number of holes, the center of the pitch; the manner shown marked overall length, width and height of the control dimension; valve flow resistance coefficient; effective opening and closing times; valve factory testing of the relevant data and installation, maintenance precautions. Weifang valve, Z341F pneumatic valve, valve type Everbright Everbright Limited provided by Shandong valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) is a specialist in the "valve" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "Everbright" brand has a good reputation. We adhere to the "service first, customers first" principle, so that the valve Everbright won the trust of customers in the congregation ball, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you!