Hangzhou Kaiwei Valve Group Co., LTD
Tel:+86-0571-88950660
Fax:+86-0571-88950550
E-mail:kw@kwvalve.cn
ADD:12F/B3 Shuangcheng International Mansion, Hangzhou, Zhejiang, China P.C310051
What is the applicable medium temperature for different valve body and bonnet materials?
The applicable medium temperature for different valve body and bonnet materials is as follows:
The maximum medium temperature for gray cast iron body and bonnet is 250℃.
Malleable iron body, valve cover applicable medium maximum service temperature is 300℃.
Ductile iron valve body, bonnet suitable for the medium maximum temperature of 350℃.
High silicon cast iron body, bonnet suitable for the medium maximum temperature of 120℃.
The highest service temperature for carbon steel valve body and bonnet is 425℃ (forgings 16Mn and 30Mn up to 450℃).
Cr5Mo alloy steel body, valve cover suitable for the medium maximum temperature of 550℃.
1Cr18Ni9Ti and Cr18Ni12Mo2Ti stainless steel body and bonnet suitable for the medium maximum temperature of 600℃.
Copper alloy valve body, bonnet suitable for the medium maximum temperature of 200℃.
Titanium valve body, valve cover applicable medium maximum temperature is 300℃.
The highest temperature of the medium suitable for plastic valve body and bonnet: nylon 100℃, chlorinated polyether 100℃, POLYvinyl chloride 60℃, polytrifluoroethylene -60~120℃, polytetrafluoroethylene -180~150℃.
Rubber diaphragm valve depends on different types of rubber, natural rubber 60℃;Nitrile butadiene rubber, neoprene 80℃;Fluororubber 150℃.
Valve lining with rubber, plastic, rubber, plastic temperature resistance shall prevail.
Ceramic and glass valves, their temperature resistance and rapid change difference, generally used below 90℃.
Enamel valve temperature resistance is limited by seal ring materials, the highest temperature of the medium over 150℃.