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1000+When the credit status reflecting a corporate credit situation is quantified as the specific value of credit point, plus the value of credit point accumulated in the course of longtime online trading, it is turned out to be the credit point for this company.
The advantages of the metal seal butterfly valve would be shown on the short structure, small size, light weight and portable operation. Or it can be said that this kind of butterfly valve would be with truss structure, high strength, large over-current, small flow resistance and energy saving. As a result, the functions would be expected to be more compact and be with reliable sealing performance. Generally speaking, it is suggested to select the a proper stainless steel sealing surface with characteristics such as good corrosion-resistant, high temperature and long service life.
Commonly, the manufacturing of the metal seal butterfly valve should be according to the GB12237-89, API608, API 6D, JPI 7S-48, BS5351 or DIN3357. And the flange sizes is regulated as JB/T74 - 90 (JB74- 90), GB9112 - 9131, HGJ44 - 76, SH3406, ANSI B16.5, JIS B2212- 2214, NF E29-211, DIN2543. What else, the length of the structure is designed according to the GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202. And all the products should be required to be tested before true running. The common applicable ones would be the JB / T 9092 and API 598.
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