Because of its advanced technology, pneumatic valve, 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 Weifang valve, 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 Applicable medium: air, water, steam, oil and nitric acid, acetic acid and other corrosive fluid mode of action: cut-off, adjustable, manual control supply voltage: 220VAC, 24VAC input signal: 4 ~ 20mA / 1 ~ 5VDC 0 ~ 20mA / 0 ~ 10VDC 2.1 quality standard pneumatic valve pneumatic valve body materials Z641F vendors, should be ductile iron, steel, stainless steel, 316L-based, and indicate the grade and cast actual physical and chemical test data. 2.2 stem material, 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 Z641F pneumatic valve manufacturers, with 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, Everbright valve model (certified), pneumatic valve provided by Shandong China Everbright Limited valve. 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.