在靠冷凝器的位置有一个气动蝶阀，将冷凝器与真空系统隔开。
A pneumatically activated butterfly valve is located close to the condenser to isolate the vacuum system from the condenser.
从主冷凝器的特性出发，对真空-凝水过冷度控制系统进行了深入地研究，详细阐述了系统的设计准则、设计模型及实现方法。
Based on character of host condensator, degree of super-cooling of vacuum-condensed water is researched. System design rule, model and realization method are illustrated in detail.
主要设备：预热器、蒸发器、冷凝器、糖度仪、真空系统、温度控制、液位控制、阀门管件、自动电气控制系统；
Main equipment: pre-heater, evaporator, condenser, sugar meter, vacuum system, temperature control, liquid level control, valve fittings, automatic electrical control system;
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