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API Standard B367 Gr.C-2 Worm Gear Operated Floating Ball Valve

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API Standard B367 Gr.C-2 Worm Gear Operated Floating Ball Valve

Titanium belongs to a metal material with relatively active chemical properties. When heating, it can interact with non-metallic materials such as O2, N2, H2, S, and halogens. At room temperature, a thin and dense oxide protective film is easily formed on the surface of titanium, which can resist the effects of strong acids and even aqua regia, demonstrating strong corrosion resistance. Titanium works safely in acidic, alkaline, and salt solutions, so many highly corrosive working environments require such titanium alloy valves.

    The density of titanium metal is 4.51g/cm3, which is higher than aluminum but lower than steel, copper, and nickel, but its specific strength is higher than that of metal materials. The strong corrosion resistance of titanium alloy valves is due to the fact that its base material, titanium, is a very active metal material with a low equilibrium potential and a high tendency for thermodynamic corrosion in the medium. In fact, titanium is very stable in many media, such as oxidizing, neutral, and weakly reducing media. This is because titanium has a great affinity with oxygen. In air or oxygen-containing media, a dense, strong adhesion, and inert oxide film is formed on the surface of titanium, protecting the titanium substrate from corrosion. Even due to mechanical wear, it will quickly self heal or regenerate. This indicates that titanium is a metal with a strong tendency towards passivation. The oxide film of titanium always maintains this characteristic when the medium temperature is below 315 ℃.

    In order to improve the corrosion resistance of titanium, surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation, and laser treatment have been developed, which enhance the protective effect of the titanium oxide film and achieve the desired corrosion resistance. A series of corrosion-resistant titanium alloys such as titanium molybdenum, titanium palladium, and titanium molybdenum nickel have been developed to meet the demand for metal materials in the production of sulfuric acid, hydrochloric acid, methylamine solutions, high-temperature wet chlorine gas, and high-temperature chlorides. Titanium castings are made of Ti-32 molybdenum alloy, and for environments where crevice corrosion or pitting corrosion often occurs, Ti-0.3 molybdenum-0.8 nickel alloy is used, or Ti-0.2 palladium alloy is used locally in titanium equipment, both of which have achieved a very good user experience.

    The new titanium alloy can be used for a long time at temperatures of 600 ℃ or higher. Titanium alloys TA7 (Ti-5Al-2.5Sn), TC4 (Ti-6Al-4V), and Ti-2.5Zr-1.5Mo are representative of ultra-low temperature titanium alloys, and their strength increases with the decrease of temperature, but their plasticity changes little. Maintaining good ductility and toughness at ultra-low temperatures of -196-253 ℃ prevents the cold brittleness of metal materials, making it an ideal material for low-temperature containers, storage tanks, and other facilities.


    - Size from 2” to 8” ( DN50mm to DN200mm).
    - Pressure ratings from Class 150LB to 600LB ( PN10 to PN100).
    - RF, RTJ or BW end.
    - PTFE, Nylon, etc.
    - The driving mode can be manual, electric, pneumatic, or equipped with an ISO platform.
    - Cast titanium material B367 Gr. C-2, B367 Gr. C-3, B367 Gr. C-5, B367 Gr. C-6, B367 Gr. C-7, etc.

    Additional Features

    Extended lever for easy operation and also available with gearing, motor actuators,pneumatic or hydraulic actuators for more difficult services.

    Split or 3-piece,split body& bonnet for 12" &small.disassembles easily for repairing components.

    Std packing multiple v-teflon packing, combined with live loading,maintains packing compression under high-cycle and severe service applications. Graphite packing is used for hightemperature situation.

    Blow-out proof stem design is a pressure-safe stem shoulder design that protects against failure under excess pressure.

    Anti statics design. A metallic contact is always granted between ball and stem /body to discharge eventual statics build-up during service.

    Fire safe designed to API607 or BS 6755 to grant their operation suitability in case of fire. Secondary metal-to metal seal acts as backup if primary seal is destroyed by fire. Valves ordered for compliance with API 607 will be provided with graphite packing and gaskets.

    Materials of Main Components

    NO. Part Names Material
    1 Body B367 Gr. C-2
    2 Seat Ring PTFE
    3 Ball B381 Gr. F-2
    4 Gasket Titanium+graphite
    5 Bolt A193 B8M
    6 Nut A194 8M
    7 Bonnet B367 Gr. C-2
    8 Stem B381 Gr. F-2
    9 Sealing Ring PTFE
    10 Ball B381 Gr. F-2
    11 Spring Inconel X 750
    12 Packing PTFE / Graphite
    13 Gland Bushing B348 Gr. 2
    14 Gland Flange A351 CF8M


    Titanium alloy ball valves have been widely used in many industries due to their excellent performance. The following are the main application areas of titanium alloy ball valves:

    1. Petroleum industry: widely used in oil extraction, transportation, refining and other processes to control the flow of media such as oil and natural gas.

    2. Chemical industry: used to control the flow of various corrosive media, such as acids, bases, salts, etc., in the chemical production process.

    3. Metallurgical industry: used in the metallurgical production process to control the flow of various high-temperature, high-pressure, and corrosive media, such as molten steel and iron.

    4. Power industry: Used in the power industry to control the flow of media such as water and steam, such as boiler feedwater systems, steam systems, etc.

    5. Environmental protection industry: Used to control the flow of various corrosive media in the environmental protection industry, such as wastewater treatment, exhaust gas treatment, etc.

    6. Food and pharmaceutical industry: Used in the food and pharmaceutical industry to control the flow of media with various hygiene level requirements, such as food processing, drug production, etc.