High Temperature Double Block&bleed Ball Valve

A: The structure of high temperature DBB ball valve is same as the normal DBB Trunnion ball valve with metal-to-metal seat. Because of the high temperature and pressure class, the seat insert will be greatly impacted by such extremely harsh conditions.

A: Firstly, you need to send the specification of this kind valve to our eamil: sales4@platinumvalve.com. Secondly, we will quote based on your requirements:material, working pressure, temperature. We will offer our price within 1 to 2 days. Thirdly, if you think our price is in your acceptable range, we will offer our for you to confirm the technical design. After confirming the price and desgin, we sign the contract and arrange the prodcution.

A: 1.Component： Stainless steel：Mian element is iron and it contains at least 11.5% chromium. From the perspective of its microstructure, it can be classified into austenite, ferrite, and martensite.For instance, austenitic stainless steel (such as 304, 316) has good corrosion resistance but lower strength, and ferritic stainless steel has a lower cost but weaker corrosion resistance. Super duplex steel:It is a high-alloy duplex stainless steel with a chromium content of over 25% (for example, 2507 contains 25% chromium), and it also incorporates elements such as molybdenum and nitrogen to form a duplex structure where the austenite and ferrite each account for approximately 50%. This structure combines high strength and high toughness. 2. Mechanical performance Super duplex steel：Super duplex steel performs better in environments with chloride ions (such as seawater and chemical media), and its resistance to pitting and crevice corrosion is far superior to that of common stainless steel. The tensile strength of super duplex steel can reach over 550 MPa, which is twice that of austenitic stainless steel (such as 316)And is suitable for high-pressure and high-stress working conditions.

A: TCC: The hardness is extremely high. The surface hardness of Ball valve with TCC can be up to 1050HV-1450HV( about 70 HRC).It has excellent wear resistance, but the thicker the coating, the lower the adhesion. CCC: Under extremely high temperature(900℃), Ball valve with CCC can still keep low friction coefficient and excellent wear resistance. STL:The hardness of cobalt-based alloy after spray welding is generally 38 - 52 HRC, while that of nickel-based alloy is 50 - 60 HRC. It possesses both corrosion resistance and wear resistance.