MAN21 / 31 manufacturers, inventory (certified), MAN21 / 31 provided by engineatlasllc. engineatlasllc (www.engineatlas.com) is specialized in the "diesel engines, generator sets, repairs, parts, accessories, project contracting, gas turbines, gas" of the enterprise, the company of "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Li Li. Valve and Valve ventilation mechanism by intake and exhaust valves, valve actuator, camshaft and camshaft drive mechanism. By the air intake and exhaust system filter, intake and exhaust pipes and mufflers composition MAN21 / 31 high quality, as well as for turbocharged diesel engine turbochargers and air coolers, their role is to work in accordance with the needs of the diesel cycle MAN21 / 31 outlets, timing toward the cylinder of an adequate supply of clean fresh air and exhaust gas after combustion cylinder dispatched. Structural features of modern large-scale low-speed marine diesel engines: 1, using a long stroke or long stroke; 2, using constant pressure turbocharging system and a high-efficiency exhaust gas turbocharger; 3, increasing the compression ratio, increasing the maximum explosion pressure Pz; 4, combustor components commonly used in drilling cooling technology; 5, using a rotary exhaust valve and hydraulic valve actuator; 6, using variable injection timing mechanism ---- VIT; 7, the use of thin wall bearing; 8, an additional damper on the crankshaft axis; 9, welded crank; 10, shaft generator ---- PTO; Chengzong Cheng screw valve camshaft bearing bushing sleeve (valve) fixed pitch bearing bushing ( valves) and install components tappet lifter ball pin ball seat assembly governor speed control drive housing assembly housing set screws M10 × 12