I would like to ask about the working principle of the three-way temperature control valve!
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The make-up water inlet pipeline that cools the compressor cylinders is equipped with a three-way temperature control valve. It resembles a control valve, but it lacks a manual valve; instead, it relies on its internal mechanism to regulate the flow of cold and hot water, thereby ensuring that the temperature after temperature control falls within the desired range for the cylinders. I would like to know what the structure inside this valve is like And how is it possible to control the flow rates of cold and hot water using temperature? Thank you!
Thermostatic valves are divided into two-way thermostatic valves and three-way thermostatic valves. The three-way temperature control valve is mainly used in single-tube systems with bypass pipes; its flow division coefficient can vary within the range of 0–100%, offering a large degree of flow regulation. Its structure is relatively complex. The typical operating pressure difference for such valves is between 2–3 mH2O, with a maximum not exceeding 6–10 mH2O. During operation, the range of preset values for the temperature control valve is specified to prevent noise generation, which could affect the proper functioning of the valve. When there are two or more valve sizes available for the same KV value, controlling is achieved by giving priority to selecting the valve with a smaller diameter.
The three-way temperature control valve is mainly used in single-tube systems with bypass pipes; its flow division ratio can vary within the range of 0–100%, providing a large degree of flow regulation. It works quite simply: after the hot medium exits, it splits into two paths – one path passes through a heat exchanger before returning to the main line via the three-way valve, while the other path enters the three-way valve from the bottom without going through a heat exchanger. The temperature is adjusted based on the degree of mixing between the hot and cold media inside the valve. It is commonly used in reboilers at the bottom of towers