A Industrial Valves commonly used materials, gray cast iron, gray cast iron is suitable for the nominal pressure PN≤ 1. 0 mpa, the temperature was minus 10 ℃ ~ 200 ℃ water, steam, air, gas, oil medium, etc. Gray cast iron used brand for HT200, HT250, HT300 and HT350. Second, malleable cast iron: suitable for nominal pressure PN≤ 2. 5 mpa, the temperature was minus 30 ~ 300 ℃ water, steam, air and oil medium, commonly used brands are: KTH300 - 06年,KTH330 - 08年,KTH350 - 10. Three, nodular cast iron: applicable to PN≤ 4. 0 mpa, the temperature was minus 30 ~ 350 ℃ water, steam, air, oil medium, etc. Commonly used brands are: QT400 - 15日,QT450 - 10、QT500 - 7. In view of the current domestic technology level, different GeChang, users are not easy to test. According to the experience, it is recommended that the PN≤ 2. 5 mpa, valves or steel valves for safety. Four, acid of high silicon ductile iron: suitable for nominal pressure PN≤ 0. 25 mpa, corrosion medium temperature below 120 ℃. Five, the carbon steel: suitable for nominal pressure PN≤ 32. 0 mpa, the temperature was minus 30 ~ 425 ℃ water, steam, air, hydrogen, ammonia, nitrogen and oil products such as medium. Commonly used brand WC1, WCB, ZG25 and high-quality steel 20, 25, 30, and low alloy structural steel, 16 mn. Six, copper alloy: suitable for PN≤ 2. 5 mpa water, sea water, oxygen, air, oil products, such as medium, and temperature 40 ~ 250 ℃ steam medium, commonly used brand for ZGnSn10Zn2 ( Tin bronze) 、H62 Hpb59 - 1 ( Brass) QAZ19 - 2、QA19- 4 ( Aluminum bronze) 。 Seven, high temperature copper: suitable for nominal pressure PN≤ 17. 0 mpa, temperature & le; 570 ℃ steam and oil products. Commonly used brand ZGCr5Mo, 1 cr5m0. ZG20CrMoV ZG15Gr1Mo1V, 12 crmov WC6, WC9, etc. The body must be in accordance with the specific selection pressure and temperature of the norms. Eight, low temperature steel: suitable for nominal pressure PN≤ 6. 4 mpa, temperature & ge; - 196 ℃ ethylene, propylene, liquid gas, liquid nitrogen, such as medium, commonly used brand) Have ZG1Cr18Ni9, 1 cr18ni9ti, ZG0Cr18Ni9 9, 0 cr18ni9, acid-proof stainless steel: applicable to the nominal pressure PN≤ 6. 4 mpa, temperature & le; 200 ℃ nitric acid, acetic acid medium, such as commonly used brand ZG0Cr18Ni9Ti, ZG0Cr18Ni10 & lt; Nitric acid resistant & gt; ，ZG0Cr18Ni12Mo2Ti 、ZG1Cr18Ni12Mo2Ti< Acid and urea & gt; Ten, plastic: for nominal pressure PN≤ 10 mpa, temperature UPVC≤ 70℃,CPVC≤ 95℃,RPP≤ 100℃,PVDF≤ 140 ℃ PVC compatible food industry chemical solvent, used in industrial design service life of the transmission fluid plastic valve for 25 years. For the valve material selection, send a poem: the city buildings stand straight, tube road road. pipe fittings more modelling, appearance patent we brought. Working condition of cast iron plastic, stainless steel demand is yours. Hotline without wealth, if any selection to consultation.
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