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Cast Steel Check Valve

The Mecco cast steel check valves are designed and manufactured according to API 6D, API 594, BS 1868, GB/T 12235, and GB/T 12236 standards. Pressure ratings include CL150, CL300, CL600, CL900, CL1500, and CL2500 (or PN16–PN420). If additional pressure levels are required, the design can be based on ASME B16.34 or GB/T 12224. The temperature range is -29°C to 538°C.
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Hydrogenation Valve

Hydrogenation valves are critical components in petroleum chemical plants, especially in hydrogenation units. Hydrogenation units are vital in petroleum refining, enhancing light oil recovery per unit of crude oil, improving fuel oil quality, supplying high-quality raw materials for petrochemical units, and achieving desulfurization of oil products. As important parts of pipeline systems, hydrogenation valves control fluid flow, regulate pressure and flow, and prevent backflow, playing a key role in the safe and stable operation of hydrogenation units. The applicable standards and product scope for this category are consistent with the gate valves, globe valves, check valves, ball valves, and others mentioned previously.
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Needle Valve

A needle valve is a high-precision valve used for accurate regulation of very small flow rates. Its core design features a slender tapered valve core (needle-shaped) that fits precisely with the valve seat to achieve fine fluid control. It is mainly applied in laboratory instruments, hydraulic systems, gas regulation, and high-precision industrial processes. Domestic design standards include JB/T 7747, or it can be designed according to ASME B16.34 or GB/T 12224.
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Fully Welded Ball Valve

MECCO Fully Welded Ball Valves are designed and manufactured in accordance with API 6D and GB/T 19672. Available pressure ratings include CL150, CL300, CL600, CL900, CL1500, and CL2500 (or PN16 to PN420). For other pressure classes, design can be based on ASME B16.34 or GB/T 12224. Operating temperature range: -50℃ to 150℃.
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High-Temperature Valve

Valves designed for media temperatures above 425℃ are defined as high-temperature valves and can be of any conventional valve type. They are generally classified as follows: PⅠ: temperature between 425℃ and 550℃; PⅡ: temperature between 550℃ and 650℃; PⅢ: temperature between 650℃ and 730℃; PⅣ: temperature between 730℃ and 816℃; PⅤ: temperature above 816℃.
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Knife Gate Valve

Knife gate valves are widely used in mining, metallurgy, chemical, sewage treatment, and food processing fields. They are suitable for media containing solid particles, fibers, or suspensions, especially for handling slurry, ash, and other complex materials. MECCO knife gate valves are designed and manufactured according to ANSI/AWWA C520, MSS SP-81, MSS SP-135, JB/T 8691, and other standards, with pressure ratings of CL150, CL300, CL600, CL900, CL1500, CL2500 (or PN16\~PN420).
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Top-Entry Ball Valve

MECCO Top-Entry Ball Valves are designed and manufactured in accordance with API 608, API 6D, ISO 17292, and GB/T 12237. Pressure ratings include CL150, CL300, CL600, CL900, CL1500, and CL2500 (or PN16 to PN420). If other pressure classes are required, the design can be carried out according to ASME B16.34 or GB/T 12224. Operating temperature range: -29℃ to 150℃.
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Forged Steel Gate Valve

MECCO Compact Forged Steel Check Valves are designed and manufactured in accordance with API 602, ISO 15761, JB/T 7746, and other relevant standards. Pressure ratings include CL150, CL300, CL600, CL800, and CL1500 (or PN16 to PN250). If the customer requires CL2500 or other pressure classes, the valves can be designed in accordance with ASME B16.34 or GB/T 12224. Operating temperature range: -29℃ to 538℃. The standard configuration is reduced bore; full bore can be provided upon request as specified in the contract.
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Rotary Ball Valve

A rotary ball valve combines the functions and advantages of butterfly valves, segmented ball valves, gate valves, and globe valves, while also possessing its own unique powerful characteristics. Its main structure is similar to a butterfly valve, featuring a compact and short design. Thanks to this structural advantage, rotary ball valves can be manufactured in extra-large and ultra-large diameters to meet the demands of projects of various scales. MECCO rotary ball valves are designed and manufactured according to JB/T 14317 and other standards, with pressure ratings up to PN40 and suitable for temperatures up to 200℃.
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Forged Steel Globe Valve

The Mecco compact forged steel globe valve is designed and manufactured in accordance with API 602, ISO 15761, and JB/T 7746 standards. It is available in pressure ratings of CL150, CL300, CL600, CL800, and CL1500 (or PN16–PN250). If CL2500 or other pressure ratings are required, the design can follow ASME B16.34 or GB/T 12224. The operating temperature range is -29°C to 538°C. The standard configuration is reduced bore; full bore can be provided upon contractual agreement.
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Jacketed Valve

Insulated valves are specially designed valves with a metal jacket welded or clamped onto the valve body. The jacket is filled with steam, heat transfer oil, cooling water, cold air, or other media to maintain the valve body’s temperature under normal, heating, or cooling conditions, achieving insulation or cooling effects. This ensures normal operation of the medium, reduces heat loss, and prevents medium crystallization or solidification. Valve types include gate valves, globe valves, check valves, ball valves, and butterfly valves.
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DBB Ball Valve (Double Ball)

MECCO DBB (Double Ball) Valves are designed and manufactured in accordance with API 6D and GB/T 19672. Available pressure ratings include CL150, CL300, CL600, CL900, CL1500, and CL2500 (or PN16 to PN420). For other pressure classes, the design can follow ASME B16.34 or GB/T 12224. Operating temperature range: -50℃ to 150℃.
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