Because of its advanced technology, reliable performance, easy operation and maintenance switch has been petroleum, chemical, metallurgy, electric power, shipping and other departments as pipeline gas, liquid medium switchgear and widely used. The main performance parameters Nominal pressure: 1.6,2.5.4.0.6.4MPa Operating temperature: -29 ~ 425 ℃ (steel) -40 ~ + 550 ℃ (stainless steel) Nominal diameter: DN50 ~ 800mm Body material: 304.306.316L.WCB .HT200 Flange: JB / T79. GB913. HG20592 Medium: corrosive fluid action of the air, water, steam, oil and nitric acid, acetic acid, etc.: cut type, modulating valve, manual control supply voltage: 220VAC, 24VAC input signal: 4 ~ 20mA / 1 ~ 5VDC 0 ~ 20mA / 0 ~ 10VDC fill valve shaft ① As the pipe network in the pneumatic valve, normally not open and close frequently, requiring the filling in a few years of inactivity, not aging filler, long-term effects remain sealed; ② fill valve shaft should also bear When the frequent opening and closing, good sealing effect; ③ Given the above requirements, fill valve shaft does not seek to change or 10 years for life without replacement; ④ Packing For replacement Z641F pneumatic valve supplier, pneumatic valves should be designed to have water pressure replacement measures under condition. Pneumatic valve body material Weifang 2.1 standard quality valves, should be ductile iron, steel, stainless steel, 316L-based, and indicate the grade and cast actual physical and chemical test data. 2.2 Z641F pneumatic valve stem material vendors, and strive to stainless steel stem (2CR13), large diameter valves should also be embedded in the package of stainless steel stem. 2.3 nut material, cast brass or aluminum bronze, and the hardness and strength are greater than the stem. 2.4 stem bushing material, its hardness and strength shall be not greater than the stem, and is immersed in water conditions and valve body is not the formation of electrochemical corrosion. Z641F pneumatic valve manufacturers, Everbright valve (certified), gate valves 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.